All sources I used as reference for this pack

Block Textures:
amethyst_block - Snapshot 20w45a
amethyst_cluster - Minecraft Live 2020
big_dripleaf_side - Minecraft Live 2020
big_dripleaf_stem - Snapshot 21w05a
big_dripleaf_tip - Minecraft Live 2020
big_dripleaf_top - Minecraft Live 2020
black_candle_lit - Release 1.19
blackstone - Snapshot 20w15a
blackstone_top - Snapshot 20w15a
blue_candle_lit - Release 1.19
brain_coral - Snapshot 18w10a, Snapshot 18w09a
brain_coral_block - Snapshot 18w09a
brain_coral_fan - Snapshot 18w11a, Snapshot 18w09a
brown_candle_lit - Release 1.19
bubble_coral - Snapshot 18w10a, Snapshot 18w09a
bubble_coral_block - Snapshot 18w09a
bubble_coral_fan - Snapshot 18w11a, Snapshot 18w09a
budding_amethyst - Snapshot 20w45a
calcite - Snapshot 20w45a
campfire_log - Snapshot 19w02a
campfire_log_lit - Snapshot 19w02a
campfire_side - Snapshot 19w02a
candle_lit - Release 1.19
cartography_table_front - Snapshot 18w44a, Release 1.18.2
cartography_table_side - Snapshot 18w44a, Release 1.18.2
cartography_table_top - Snapshot 18w44a, Release 1.18.2
chain - https://twitter.com/_LadyAgnes/status/1060854320516788224
chiseled_deepslate - Old Grimstone Color Palette
chiseled_nether_bricks - Snapshot 20w15a
coal_ore - Release 1.16.5
cobbled_deepslate - Old Grimstone Color Palette
copper_block - Old Copper Color Palette
copper_ore - Snapshot 20w45a
cracked_deepslate_bricks - Old Grimstone Color Palette
cracked_deepslate_tiles - Old Grimstone Color Palette
cracked_polished_blackstone_bricks - Snapshot 20w15a
crimson_door_bottom - Snapshot 20w06a
crimson_door_top - Snapshot 20w06a
crimson_stem_top - Release 1.17.1, Snapshot 20w06a
cut_copper - Minecraft Live 2020
cyan_candle_lit - Release 1.19
dark_oak_log_top - Release 1.17
dead_brain_coral - Snapshot 18w10a, Snapshot 18w09a
dead_brain_coral_block - Snapshot 18w09a
dead_brain_coral_fan - Snapshot 18w11a, Snapshot 18w09a
dead_bubble_coral - Snapshot 18w10a, Snapshot 18w09a
dead_bubble_coral_block - Snapshot 18w09a
dead_bubble_coral_fan - Snapshot 18w09a, Snapshot 18w09a
dead_fire_coral - Snapshot 18w10a, Snapshot 18w10a
dead_fire_coral_block - Snapshot 18w09a
dead_fire_coral_fan - Snapshot 18w11a, Snapshot 18w09a
dead_horn_coral - Snapshot 18w10a, Snapshot 18w09a
dead_horn_coral_block - Snapshot 18w09a
dead_horn_coral_fan - Snapshot 18w11a, Snapshot 18w09a
dead_tube_coral - Snapshot 18w10a, Snapshot 18w09a
dead_tube_coral_block - Snapshot 18w09a
dead_tube_coral_fan - Snapshot 18w11a, Snapshot 18w09a
deepslate - Minecraft Live 2020
deepslate_bricks - Old Grimstone Color Palette
deepslate_coal_ore - Old Grimstone Color Palette, Release 1.16.5
deepslate_copper_ore - Old Grimstone Color Palette, Snapshot 20w45a
deepslate_diamond_ore - Old Grimstone Color Palette, Release 1.16.5
deepslate_emerald_ore - Old Grimstone Color Palette, Release 1.16.5
deepslate_gold_ore - Old Grimstone Color Palette, Release 1.16.5
deepslate_iron_ore - Old Grimstone Color Palette, Release 1.16.5
deepslate_lapis_ore - Old Grimstone Color Palette, Release 1.16.5
deepslate_redstone_ore - Old Grimstone Color Palette, Release 1.16.5
deepslate_tiles - Old Grimstone Color Palette
deepslate_top - Minecraft Live 2020
diamond_ore - Release 1.16.5
dried_kelp_bottom - Beta 1.2.14.2
dried_kelp_side - Beta 1.2.14.2
dried_kelp_top - Beta 1.2.14.2
dripstone_block - https://twitter.com/Xilefian/status/1390661653969133568
dripstone_block_top - https://twitter.com/Xilefian/status/1390661653969133568
emerald_ore - Release 1.16.5
exposed_copper - Old Copper Color Palette
exposed_cut_copper - Minecraft Live 2020
bubble_color_block - Snapshot 18w09a
fire_coral - Snapshot 18w10a, Snapshot 18w09a
fire_coral_block - Snapshot 18w09a
fire_coral_fan - Snapshot 18w11a, Snapshot 18w09a
fletching_table_front - Snapshot 18w44a, Release 1.18.2
fletching_table_side - Snapshot 18w44a, Release 1.18.2
fletching_table_top - Snapshot 18w44a
frogspawn - Beta 1.18.10.24
gilded_blackstone - 20w15a
glow_lichen - https://minecraft.fandom.com/wiki/File:JE_1.17_Dev_Glow_Lichen.png
gold_ore - Release 1.16.5
gray_candle_lit - Release 1.19
green_candle_lit - Release 1.19
grindstone_round - Snapshot 18w44a
grindstone_side - Snapshot 18w44a
hanging_roots - Snapshot 21w05a
honey_block - Minecon Live 2019
horn_coral - Snapshot 18w10a, Snapshot 18w09a
horn_coral_block - Snapshot 18w09a
horn_coral_fan - Snapshot 18w11a, Snapshot 18w09a
iron_ore - Release 1.16.5
jigsaw_side - Snapshot 18w46a
jigsaw_top - Snapshot 18w46a
kelp - Snapshot 18w07a
kelp_plant - Snapshot 18w07a
lantern - https://twitter.com/_LadyAgnes/status/1060854320516788224
lantern_bottom - Release 1.18.2
lapis_ore - Release 1.16.5
large_amethyst_bud - Minecraft Live 2020
light_blue_candle_lit - Release 1.19
light_gray_candle_lit - Release 1.19
lightning_rod - Snapshot 20w45a
lightning_rod_on - Snapshot 20w45a
lime_candle_lit - Release 1.19
loom_top - Snapshot 18w43a
magenta_candle_lit - Release 1.19
mangrove_door_bottom - Old Mangrove Color Palette
mangrove_door_top - Old Mangrove Color Palette
mangrove_leaves - Snapshot 22w11a
mangrove_log_top - Minecraft Live 2021
mangrove_planks - Minecraft Live 2021
mangrove_trapdoor - Old Mangrove Color Palette
medium_amethyst_bud - Minecraft Live 2020
mud - https://www.youtube.com/watch?v=DAfFKNE6us4
muddy_mangrove_roots - Snapshot 22w11a, https://www.youtube.com/watch?v=DAfFKNE6us4
nether_gold_ore - Snapshot 20w11a
nether_sprouts - Snapshot 20w06a
nether_wart_block - Release 1.15.2
netherite_block - Release 1.19, Bedrock Release 1.16.0
ochre_froglight_side - Beta 1.18.10.26
ochre_froglight_top - Beta 1.18.10.26
orange_candle_lit - Release 1.19
oxidized_copper - Old Copper Color Palette
oxidized_cut_copper - Minecraft Live 2020
pearlescent_froglight_side - Beta 1.18.10.26
pearlescent_froglight_top - Beta 1.18.10.26
pink_candle_lit - Release 1.19
polished_blackstone_bricks - Snapshot 20w15a
polished_deepslate - Old Grimstone Color Palette
purple_candle_lit - Release 1.19
quartz_bricks - Snapshot 20w15a
raw_copper_block - Snapshot 21w15a
raw_gold_block - Snapshot 21w15a
raw_iron_block - Snapshot 21w15a
red_candle_lit - Release 1.19
redstone_ore - Release 1.16.5
reinforced_deepslate_bottom - Old Grimstone Color Palette, Old Sculk Color Palette
reinforced_deepslate_side - Old Grimstone Color Palette, Old Sculk Color Palette
reinforced_deepslate_top - Old Grimstone Color Palette, Old Sculk Color Palette
scaffolding_side - Snapshot 18w45a
sculk - Minecraft Live 2020
sculk_catalyst_bottom - Old Sculk Color Palette
sculk_catalyst_side - Minecraft Live 2020
sculk_catalyst_side_bloom - Minecraft Live 2020
sculk_catalyst_top - Minecraft Live 2020
sculk_catalyst_top_bloom - Minecraft Live 2020
sculk_sensor_bottom - Minecraft Live 2020
sculk_sensor_side - Beta 1.16.210.56
sculk_sensor_tendril_active - Minecraft Live 2020
sculk_sensor_tendril_inactive - Minecraft Live 2020
sculk_sensor_top - Beta 1.16.210.56
sculk_shrieker_bottom - Minecraft Live 2020
sculk_shrieker_can_summon_inner_top - Beta 1.17.30.23, Old Sculk Color Palette
sculk_shrieker_inner_top - Snapshot 22w13a, Beta 1.17.30.23, Old Sculk Color Palette
sculk_shrieker_side - Beta 1.17.30.23, Old Sculk Color Palette
sculk_shrieker_top - Beta 1.17.30.23
sculk_vein - Minecraft Live 2020
small_dripleaf_stem_top - Snapshot 21w05a
smithing_table_front - Snapshot 18w44a, Release 1.18.2
smithing_table_side - Snapshot 18w44a, Release 1.18.2
smithing_table_top - Snapshot 18w44a
soul_campfire - Snapshot 19w02a
soul_lantern - Snapshot 20w06a, https://twitter.com/_LadyAgnes/status/1060854320516788224
spore_blossom - Minecraft Live 2020
spore_blossom_base - Minecraft Live 2020
stonecutter_bottom - Snapshot 18w44a
stonecutter_saw - Snapshot 18w44a
stonecutter_side - Snapshot 18w44a
stonecutter_top - Snapshot 18w44a
stripped_crimson_stem_top - Snapshot 20w06a
stripped_dark_oak_log - Release 1.17.1
stripped_mangrove_log - Old Mangrove Color Palette
stripped_mangrove_log_top - Old Mangrove Color Palette
stripped_warped_stem_top - Snapshot 20w06a
tinted_glass - Snapshot 20w45a
tube_coral - Snapshot 18w10a, Snapshot 18w09a
tube_coral_block - Snapshot 18w09a
tube_coral_fan - Snapshot 18w11a, Snapshot 18w09a
verdent_froglight_side - Beta 1.18.10.26
verdent_froglight_top - Beta 1.18.10.26
warped_door_bottom - Snapshot 20w06a
warped_door_top - Snapshot 20w06a
warped_stem_top - Release 1.17.1, Snapshot 20w06a
warped_wart_block - Release 1.15.2, Release 1.16.5
weathered_copper - Old Copper Color Palette
weathered_cut_copper - Minecraft Live 2020
white_candle_lit - Release 1.19
yellow_candle_lit - Release 1.19

Item Textures:
acacia_boat - Release 1.18.2
acacia_chest_boat - Release 1.18.2, Snapshot 22w12a
acacia_door - Release 1.17.1
acacia_sign - Release 1.17.1
allay_spawn_egg - me
amethyst_shard - Snapshot 20w45a
axolotl_bucket - Minecraft Live 2020
birch_boat - Release 1.18.2
birch_chest_boat - Release 1.18.2, Snapshot 22w12a
birch_door - Release 1.17.1
birch_sign - Release 1.17.1
black_candle - Snapshot 20w45a
blue_candle - Snapshot 20w45a
brown_candle - Snapshot 20w45a
bundle - Snapshot 20w45a
bundle_filled - Snapshot 20w45a
chain - https://twitter.com/_LadyAgnes/status/1060854320516788224
cooked_salmon - Snapshot 18w08b
copper_ingot - Old Copper Color Palette
crimson_door - Snapshot 20w06a
crimson_roots - Snapshot 20w06a
crimson_sign - Old Sign Texture Style, Release 1.17.1
crossbow_arrow - Release 1.18.2, Minecraft Dungeons, https://www.minecraft.net/en-us/article/meet-pillagers
crossbow_firework - Release 1.18.2, Minecraft Dungeons, https://www.minecraft.net/en-us/article/meet-pillagers
crossbow_pulling_0 - Minecraft Dungeons, https://www.minecraft.net/en-us/article/meet-pillagers
crossbow_pulling_1 - Minecraft Dungeons, https://www.minecraft.net/en-us/article/meet-pillagers
crossbow_pulling_2 - Minecraft Dungeons, https://www.minecraft.net/en-us/article/meet-pillagers
crossbow_standby - Minecraft Dungeons, https://www.minecraft.net/en-us/article/meet-pillagers
cyan_candle - Snapshot 20w45a
dark_oak_boat - Release 1.18.2
dark_oak_chest_boat - Release 1.18.2, Snapshot 22w12a
dark_oak_door - Release 1.17.1
dark_oak_sign - Release 1.17.1
disc_fragment_5 - Old Grimstone Color Palette, Old Sculk Color Palette
echo_shard - Old Sculk Color Palette
glow_item_frame - Release 1.17.1
gray_candle - Snapshot 20w45a
green_candle - Snapshot 20w45a
honey_bottle - Beta 1.14.0.1
honeycomb - Beta 1.14.0.1
iron_door - Release 1.17.1
item_frame - Release 1.17.1
jungle_boat - Release 1.18.2
jungle_chest_boat - Release 1.18.2, Snapshot 22w12a
jungle_door - Release 1.16.5
jungle_sign - Release 1.17.1
light - Snapshot 21w13a
light_00-15 - Snapshot 21w13a
light_blue_candle - Snapshot 20w45a
light_gray_candle - Snapshot 20w45a
lime_candle - Snapshot 20w45a
magenta_candle - Snapshot 20w45a
mangrove_boat - Old Boat Texture Style, Old Mangrove Color Palette
mangrove_chest_boat - Old Boat Texture Style, Old Mangrove Color Palette, Snapshot 22w12a
mangrove_door - Old Door Texture Style, Old Mangrove Color Palette
mangrove_sign - Old Sign Texture Style, Old Mangrove Color Palette
music_disc_5 - Old Grimstone Color Palette, Old Sculk Color Palette
nether_sprouts - Snapshot 20w06a
netherite_axe - Snapshot 20w06a
netherite_boots - Snapshot 20w06a
netherite_chestplate - Snapshot 20w06a
netherite_helmet - Snapshot 20w06a
netherite_hoe - Snapshot 20w06a
netherite_ingot - Bedrock Release 1.16.0
netherite_leggings - Snapshot 20w06a
netherite_pickaxe - Snapshot 20w06a
netherite_scrap - Snapshot 20w06a
netherite_shovel - Snapshot 20w06a
netherite_sword - Snapshot 20w06a
oak_boat - Release 1.18.2
oak_chest_boat - Release 1.18.2, Snapshot 22w12a
oak_door - Release 1.17.1
oak_sign - Release 1.17.1
orange_candle - Snapshot 20w45a
phantom_membrane - Snapshot 18w07a, Release 1.19
phantom_spawn_egg - Snapshot 18w07a, Recreated in Blockbench
pink_candle - Snapshot 20w45a
purple_candle - Snapshot 20w45a
raw_copper - Snapshot 21w14a
raw_gold - Snapshot 21w14a
raw_iron - Snapshot 21w14a
red_candle - Snapshot 20w45a
seagrass - Release 1.18.2
soul_lantern - Snapshot 20w06a
spruce_boat - Release 1.18.2
spruce_chest_boat - Release 1.18.2, Snapshot 22w12a
spruce_door - Release 1.17.1
spruce_sign - Release 1.17.1
spyglass - Snapshot 20w45a
warped_door - Snapshot 20w06a
warped_fungus - Snapshot 20w06a
warped_sign - Old Sign Texture Style, Release 1.17.1
white_candle - Snapshot 20w45a
yellow_candle - Snapshot 20w45a

Entities:
allay - A leaked texture on the Minecraft Merch Store that has since been taken down
aggressive_panda - Beta 1.8.0.8
axolotl_cyan - https://www.minecraft.net/en-us/article/minecraft-live-the-recap
axolotl_lucy - Minecraft Live 2020
boat\mangrove - Old Mangrove Color Palette
chest_boat\mangrove - Old Mangrove Color Palette
cold_frog - Minecraft Live 2021, Minecraft Now May 2022
hoglin - Minecraft Live 2020
temperate_frog - Minecraft Now May 2022
warm_frog - Minecraft Now May 2022
phantom - Snapshot 18w07a
salmon - Minecraft Live 2017 (silhouette seen here: https://www.youtube.com/watch?v=mAapz_nIC_Y&t=808s)
signs\mangrove - Old Mangrove Color Palette
strider_cold - https://twitter.com/Xilefian/status/1432379731668873225
wandering_trader - https://www.minecraft.net/en-us/article/meet-wandering-trader
warden - Minecraft Live 2020
warden_heart - Minecraft Live 2020
warden_pulsating_spots_1 - Minecraft Live 2020, Snapshot 22w13a
warden_pulsating_spots_2 - Minecraft Live 2020, Snapshot 22w13a
zoglin - Minecraft Live 2020, Release 1.19
zombified_piglin - Snapshot 20w09a (slightly modified)

Particles:
nautilus - Snapshot 18w15a
sculk_charge - https://twitter.com/gnembon_mc/status/1487086433324212229
sculk_charge_pop - https://twitter.com/gnembon_mc/status/1487086433324212229
sculk_soul - Old Sculk Color Palette
sonic_boom - Snapshot 22w15a

Armor:
netherite_layer_1 - Snapshot 20w06a
netherite_layer_2 - Snapshot 20w06a

Misc:
spyglass_scope - Snapshot 20w45a

Mob Effects:
bad_omen - Snapshot 18w47a
hero_of_the_village - Beta 1.11.0.1

GUI:
pack.png - me
panorama - Seed discovered by Minecraft@Home: -1696067516
report_button - Snapshot 22w24a

Sounds:
allay - Snapshot 22w13a

Block Models:
bell_between_walls - Snapshot 18w50a
bell_ceiling - Snapshot 18w44a
bell_floor - Snapshot 18w44a
bell_wall - Snapshot 18w50a
big_dripleaf - Snapshot 21w05a
big_dripleaf_full_tilt - Snapshot 21w05a
big_dripleaf_partial_tilt - Snapshot 21w05a
big_dripleaf_stem - Snapshot 21w05a
blackstone - Snapshot 20w15a
blackstone_slab - Snapshot 20w15a
blackstone_slab_top - Snapshot 20w15a
blackstone_stairs - Snapshot 20w15a
blackstone_stairs_inner - Snapshot 20w15a
blackstone_stairs_outer - Snapshot 20w15a
campfire - Snapshot 19w02a
campfire_off - Snapshot 19w02a
cartography_table - Snapshot 18w44a
fletching_table - Snapshot 18w44a
honey_block - slime_block.json
jigsaw - Snapshot 18w46a
kelp - Snapshot 18w07a
lectern - Release 1.19.2 (slightly modified), https://twitter.com/Dinnerbone/status/1052917362482122752
mangrove_propagule - Minecraft Live 2021
mangrove_roots - Snapshot 22w17a
scaffolding_stable - Snapshot 18w45a
scaffolding_unstable - Snapshot 18w45a
sculk_jaw - Minecraft Live 2020
sculk_shrieker - Beta 1.18.0.22
sculk_shrieker_can_summon - Beta 1.18.0.22
small_dripleaf_bottom - Snapshot 21w05a
small_dripleaf_top - Snapshot 21w05a
smithing_table - Snapshot 18w44a
soul_campfire - Snapshot 19w02a
template_hanging_lantern - https://twitter.com/_LadyAgnes/status/1060854320516788224
template_lantern - https://twitter.com/_LadyAgnes/status/1060854320516788224

Item Models:
campfire - Snapshot 19w02a
crimson_roots - Snapshot 20w06a
pointed_dripstone - Snapshot 20w48a
soul_campfire - Snapshot 19w02a
spyglass_in_hand - Snapshot 20w45a
warped_fungus - Snapshot 20w06a
phantom_spawn_egg - Snapshot 18w07a, Recreated in Blockbench

Entity Models:
allay - A leaked model on the Minecraft Merch Store that has since been taken down
Axolotl - Minecraft Live 2020
chest_boat - Minecraft Live 2021
frog - Minecraft Now May 2022
hoglin - Minecraft Live 2020
phantom - Snapshot 18w07a
piglin - Snapshot 20w07a
piglin_brute - Snapshot 20w07a
salmon - Minecon Earth 2017 (silhouette seen here: https://www.youtube.com/watch?v=mAapz_nIC_Y&t=808s)
zoglin - Minecraft Live 2020
zombified_piglin - Snapshot 20w09a

Colormap:
mangrove - Minecraft Live 2021

Random Entities:
pig2 - Release 1.19, Technoblade's skin
piglin2 - Release 1.19, Technoblade's skin
piglin_brute2 - Release 1.19, Technoblade's skin
strider2 - Release 1.19, slightly modified

Texts:
Banner Pattern\Piglin - Snapshot 20w15a
Bamboo Sapling - Release 1.15.2
Chisled Grimstone - Snapshot 21w07a
Cobbled Grimstone - Snapshot 21w07a
Cobbled Grimstone Slab - Snapshot 21w07a
Cobbled Grimstone Stairs - Snapshot 21w07a
Cobbled Grimstone Wall - Snapshot 21w07a
Cracked Grimstone Bricks - Snapshot 21w07a
Cracked Grimstone Tiles - Snapshot 21w07a
Crimson Fungi - Snapshot 20w06a
Extreme Hills - Release 1.17.1
Frog Egg - Beta 1.18.10.24
Giant Spruce Taiga - Release 1.17.1
Giant Tree Taiga - Release 1.17.1
Gravelly Hills - Release 1.17.1
Goat Horn\Resist - Beta 1.18.30.26
Grass Path - Release 1.17.1
Grimstone - Snapshot 21w07a
Grimstone Bricks - Snapshot 21w07a
Grimstone Brick Slab - Snapshot 21w07a
Grimstone Brick Stairs - Snapshot 21w07a
Grimstone Brick Wall - Snapshot 21w07a
Grimstone Coal Ore - Snapshot 21w07a
Grimstone Copper Ore - Snapshot 21w07a
Grimstone Diamond Ore - Snapshot 21w07a
Grimstone Emerald Ore - Snapshot 21w07a
Grimstone Gold Ore - Snapshot 21w07a
Grimstone Iron Ore - Snapshot 21w07a
Grimstone Lapis Lazuli Ore - Snapshot 21w07a
Grimstone Redstone Ore - Snapshot 21w07a
Grimstone Tiles - Snapshot 21w07a
Grimstone Tile Slab - Snapshot 21w07a
Grimstone Tile Stairs - Snapshot 21w07a
Grimstone Tile Wall - Snapshot 21w07a
Illager Banner - Snapshot 18w45a
Infested Grimstone - Snapshot 21w07a
Lofty Peaks - Beta 1.16.220.50
[Mob] Bucket - Snapshot 18w10b
Mountain Grove - Beta 1.16.220.50
Mountain Meadow - Beta 1.16.220.50
Polished Grimstone - Snapshot 21w07a
Polished Grimstone Slab - Snapshot 21w07a
Polished Grimstone Stairs - Snapshot 21w07a
Polished Grimstone Wall - Snapshot 21w07a
Reinforced Grimstone - Snapshot 21w07a
Tall Birch Forest - Release 1.17.1
Sea Grass - Snapshot 18w07a
Shattered Savanna - Release 1.17
Snowcapped Peaks - Beta 1.16.220.50
Snowy Tundra - Release 1.17.1
Soul Shard - https://www.minecraft.net/en-us/article/minecraft-snapshot-22w14a, https://twitter.com/corruptnnn/status/1511736164293791760 (It was initially called the "Soul Shard" in the changelog, but they quickly changed it)
Soul Fire Torch - Snapshot 20w06a
Soul Fire Lantern - Snapshot 20w06a
Stone Shore - Release 1.17.1
Tall Sea Grass - Snapshot 18w07a
Turtle Shell Piece - Snapshot 18w07a
Warped Fungi - Snapshot 20w06a
Wooded Badlands Plateau - Release 1.17.1
Wooded Mountains - Release 1.17.1