Leon Chang is an artist, musician, and prominent online personality associated with Weird Twitter, where he is known as @leyawn. In 2017, he released Bird World, an album designed as a soundtrack to a
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dfee52d81bd6515de428c2930a549c9d7110291e6df6138eb9648f6ef45f4f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bc6c67f-37a8-4be3-b477-bf295f5f9093.json and https://artists.proofprofile.net/proofs/artist/1bc6c67f-37a8-4be3-b477-bf295f5f9093.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b9bc7cd2dd35c0d8c78387961410546a109197049fbea17151ae9537e72782. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa37f027ad7dc190bd0ec7e37fe9325c6054f0f4a7e5545f92cd684f3a49b691. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:01:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c32593fe435ce6067630d5a5da80e648538fc917f83fe94d236a0d063303329. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124b5e8bbd20ab830e0b8a43feb33613c5aba198ca21e6a100545d62a58cf04c. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15939fa5c941452922fff76677ac55a761df9ed08089d447c9571b1801f95fa2. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4000437d9ffd9cbf04db5670404a7be73dc00adaa4afba54f4c649f02d33da4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05d4008f6ca6433e96c5b3c77bba6e2f80a6ec1e47843fa52d44b809acf4093. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4a473d91759e572cfd9c3abf9ef226c0a72c8de78d494a1e405cf71a4dee37. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f1e4a5d34b6a2b1bda3a2e6b907e671981cf2cdea3625997132cfba8aa8918. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451e2ad80073f42c6b6a82a279d00b330be0a64e4333561f0dd9aca5ab8b6693. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f45b3bee8dd1eb3c2fbd080fbedfcc6b5984d375cbeb6aed3689af12a0d03f0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fb724584f17dda0bd9a11919c56db2f7933234f9a20ff7eb875b3286e16a99. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227c74c47c278eaa08f3f7b10b78a9b8186ce630b865c17b6376be931eb784a9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567d3b20c69b2f09d5648e6091c452fed9a7e018b3756ad0bd119449fbc3b0af. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e91c6d8ae65385bc97886c6a3f79fef2acf4aac6c0bc9f946de7c2cdb40f682. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:52:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4a9562f8bac0cec4831ec815c5ee278de0cb26bacc9d782d081c0c155eeec1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:17:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45c54663eaf321a42fd27bf3ee141a97ceab33a8118b6dc1434ee28142cfaa2. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7756b5be7020c5ff5622fc7445cf38b7787ad48265c41072a730e8afd386d5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:46:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67953d71a2ffdba67aea6127b8fe6f24d85ee2b77bdc1b434adc1c7f53b20656. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71826287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb491c1a1a803571ea8b3318a3ed192144121c8bfd5dc014078a370144134fb9e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES61831534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685b924f41654d51dcc6b9227b35995ad7cbd4875925a87bccd311ef5b2a266b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES61831535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b8f93288bcc66d721092a62f142950753dcd30fcdba01c7d67d20ee107eeb7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES61831536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5a6b30edc88f28cfef984b0c971aa4ecd9458a4c515328876d5f480bee5eca. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:54:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES61831537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cca0f72350bbecf5514d59ccd38279895c0579ade33e2b843d1129a56c0bffd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2017803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4f7f8267b91bc20b9eabf71313267a2d3e13d8e6f026f803b64a1d0c556b15. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2017805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ae500596eaa05e5cc56a09e260b8829ee99a75172da9193756fb024e6f8f1d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2017806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3697ab2d2c588bbc60e60bf1bfe775daa983dbf8a81db04c5292d64ee8e29343. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2017808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dca8d280cffcd948d24fed9c91cb208d01b049709eb080ed496c12a34da3c10. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6L2124698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3953f074bfcf0e649c58b4a3cb03c0d7bd26ee8b3c133c1819a54818b29d6453. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6L2124700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cc2f2e7018411bbfc5859f5ac7310133109c83e02b5a1a19114031d12c9a82. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB62236135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979f5f3dd73cbe34e10ea6dd54d434242953f7520d3eb03668f56da67580a251. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB62236137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4816557dbf9baa9a0257c262ad89111e63560a9fc090c7c338614a163da9caf2. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB62236138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e706791de12481be446a69845a883f7f6dc19d84d2b3186da3c9573a9b6722. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB62236141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273dc795f8b5f95fafc73f86eabaf8082be5066c17530ef83cdc0c8ff845a87a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB62236144.
i spent the whole summer playing video games
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1947f17d6fe7d4e44dfab62ca302b70ebe4e3dbec5b8d3ca2b05bb2ffb4f6da. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2397227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91389f098ce2b9a75ad3a30b23039b1ae546517fc6959e5e4bed813ce9ff622d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2397228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541a9a821f257de2f8b9ebabcfa7e5d69ee595c6b14cd23a05656b946be7d366. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2397229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979723068b1a97294568309c92c224dbcb4cff4fdec2f08bea7cdbb22d8462b8. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2397230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90fe1b38a87b775c68baccc5105cb49f6c8fb07326532dfad4506f11f82322e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2397235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81db63ec55fd7601118bf13814eedf60b1ff095f738bfb1cc1d7d12d5de4cc14. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZH6S1900604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93aea97c952d18bae1ae8cd7eb9c0a32482163fc795c77089d06b36133b4ac7e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZH6S1900616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa1e4cdb49c0243b0ad37b694c3a7426c1afd50b2872ec2c0c7418c124998fc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU4003110.