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 0xe8e22a797951e265026adff55755024f8b7f4d8f093ecb4cced10f7bc90ff62e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4029352-6bdd-481e-b7d4-9dc78a3042cc.json and https://artists.proofprofile.net/proofs/artist/b4029352-6bdd-481e-b7d4-9dc78a3042cc.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 0xdb812871d38a5f2236d2d10700a9f719b2cc6e39401c1e658dcd64490e8e292d. 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/QZGLS2303770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fe8f7d6db72bce5bc32f3b70a88b4691a200f7abc9de107d579e825e20db38. 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/QZNJV2342509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ef404632abfa534d605c3af61c07e0814584ad03affd803525d760e2a79187. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJY2430348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fe14780ff0a32f6bc0d0f5e4b4fbf982d30fb380941091ad285dad75e4211a. 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/QZNJY2430386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02461fb442e2a740a38f562d79c52d1ef9db9af4186ae4d225a6c3993b64aea5. 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/QZNJW2441606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47c3b2fbbb6a706f3e0c653a9731145ee1255b0c95528167d9b52fe68b7501b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGLS2493912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70f5726144449ce552efd8705031aca80ba2b5526d11ce88287dd291ee96c1d. 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/QZGLS2453408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7c4e60f14684200d68a45ed2e6b5ad743eb6464c94b5516ce5b7216b1fd5c9. 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/QZGLM2498300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1ace41ebaad3bde40cc6ffdfe9d4ac742a5a1f18599f93fa2e67b49fa74730. 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/QZZ662455061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae6c233a59a7b840266aaadde378c2528f07621faed7f2bf6952fac3c6ed1bd. 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/QZZ662422953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f2609ca085fdfd4124d32f70f512f7054959becc8b7ee200f18aada90e0b20. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ662401199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61808e8b0a8ade7bf1369719eb4e639a304d0dade70a43d34e422a43f0933fc2. 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/QZZ662401186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480297c0ca13ecedbb7c00445c1ce17a6f1f4b09cfe41021a03b45a5622d9096. 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/QZZ662351351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2b21837893ed0578afdbf642aa3e0d9643f0a7971781f56c0576446b88037b. 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/QZW9L2314291.
Me Perdoa / Shouya Ishida (Koe no Katachi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b5a35169e1e9aa3564c0d417cf93bbbf503f91a17b6be188585fb2d7485a69. 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/QZW9L2314285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fadd4ad928a54d1a4551fd8a5ab41d5bb0f7036d1904c7d5575eaa139df34bd. 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/QZW9K2351670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356be09d45a1b3107998180caadb03cfb89ca99969898be1fa4a3ddfc72ca5ce. 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/QZW9K2318071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146319205a535c7f21d5b4da29d5110c5e005fba9705bb62a163ec787eedb9a1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTVM2364531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9323405ae97ab2398a1fdf9ec0cca4272040abd9d1aa61f38f31a459849de0. 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/QZNJZ2385851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fadd097a900abb623ffa8be036841813b28631dd6ce4d9dd652c29243d148bf. 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/QZNJZ2386165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f34238b942be96d7eedfaf7ba30188b4c13b73872f20420a9c00b7c6bf26bb0. 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/QZNJX2382388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2621a32a6f2474db6efc7e2da74140aefee3df6b24e5d27a6696c644d34c3180. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJW2315339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01eda99c8f5d0ca6d614e475e1af6b001bbdc0e60489fbe299f9b6904745893a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJV2342505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c17f916492620a7107e76a58db4343edb4036e6961d26dd9a3bb858ed6269d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJV2342507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673981a2067a23e343542cf90049b9ed842f553d9c01f0ee9bda9df21b3e01ba. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMZ92360270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7c96bbb0a855bb86fa6e2b8d4fa943a67c565a585fb4172d2c55594393ece5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BKTOK2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92768c5ff5d42f016c88ea18e3708605eb09dc030854103f7b671d3551b7326f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKTOK2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b06ff252d50c3b2aac41037cf7b4c33e39041165902bbea9b3b4e724469048. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLS2324629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650f38ac18d052b93ce967fb4d02382e6f4e8d9e18209ece61069af06e2c13d3. 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/QZGLS2399120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd873adf4495801df7ac04e483d5b8b23856c81d3050efe4f1711be102e175a80. 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/QZGLS2332486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe242d520ad98384eeba97aab5354bfc90929d589d0a5ccde583601ffb3d8d351. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5AB2302501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7d6e438cce16b72d1e7201507eac0f164074056b5f1da697441de814b13141. 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/US7VG2347840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7608afeec792d93522121245354908d70ca7aea3864576ede1ae3622a2829dfd. 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/US7VG2350532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f61dcf1a603f1f02648de9895d34f956ac00e4322b0c9f4352aa7cabea17f8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9M2295954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceca50fdcc2ac4965bf50c59e47cd96649ef2ca64d336a9d0228c7ae15148bc0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9L2274162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59bd10cf084ec9598edc101b1528bda5356b2b5d422513dc5c21b537046ed0e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9L2273382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424c2650af5eb1af97a92d8e7d101d702548e0ff9695a3b68554a523fb8f73c2. 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/QZW9L2273806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae090fdc662e9378092dd121663aa23a69a2afccf205ca3f0653ff1aa6a886d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZW9L2262266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465dc6d0200caf67cf1b6e726f92acf89b3d4ad8813e04ee92707126f00c0906. 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/QZW9K2274237.