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 0xea1271e2ff48310bf6d192b0508394f0c1577c56233558b69176647c6f4fdb4e. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e035fae-98ad-4e57-9d26-2091f7747099.json and https://artists.proofprofile.net/proofs/artist/6e035fae-98ad-4e57-9d26-2091f7747099.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 0x03f8287cf6370e7ebca068552953baf00d78d6effd5f5882583186f95babe0ae. 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/TWAN76890131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3311caa1ec0db432c53b3f4d1cfe7772d842fd4629dcca4b871b11389abec8. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/TWAN76890132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06757c731b8c413817284b84db151dcadf8cefb0b5e7f529012ec324857720d8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWAN76890135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac73a07319aba2783da493c3458d929aa0c80200a56e956863bf05212de711a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TWAN76890136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2a941aa7bc483ef4cdc12b6d0f7a8788f5b129e6f1b8d2625ee340d5442e21. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWAN76890138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fede27a2f4f684d10a7b00f0c83528057dd842dd62220444fd6d8b97326cc9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:35:56Z), 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/TWAN76890130.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b85b80a28e553b590fe8c733b1a33e1be01bb97c861f3b35eea0e34aa6fbda5. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:56:06Z), 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/TWAN76890133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0649b55b1e69db9837f614be07b9798920f073ebd0336355085cbad294033a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:39:33Z), 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/TWAN76890139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d68a250e35d6f3ed631dd1261ea936ec56fe253b06b768be84a085c76a4f321. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TWAN76890134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8392ae81198782f2d8dc38c41ce5ef6902f7dd9a42e270ed576df2dd56fab1. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/TWAN76890137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c195f8e58b4784623a2f3d95a75f0978a22ae721507c848e801f538389f227. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/TWAN76890140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edb88f12c8a8268d90c0fa5a04a2d663b69148eccb595fd9198bdccbc87609c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWA310507204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a32004040b6e20151190fa6ca571b9d68988755fb5d598034063d9abaae7f0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA310507205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f829011a1a8a034588b0f53b43d810e3d429f7efcab53bf66e4d1d484aef5e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA310507207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b31751119e70369af3ca5f16dfd8c51b667dcec911f45169a53ed75fa22051. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWA310507208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e02ee2303ac5089c95cc5fb73dcf3910aef60e79e2a57fa2202a8e5a8bc5131. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWA310507212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c719c3d71f82c00e3d8dae7384d4dea16f761302059e126a2e230bcefc254ba. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWA310507214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d414de557ecca563c7f9bcf6581c783c1e14ac24868ed5bbf1b67fb48802e2f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWA310507215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eddff5203ea845ad644612220090de8d1c3bc60feedd6c1b61a296beae2765. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWA310507218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae19e6e8d7a70ae5de3ed5c10bc3adb7bd60e5677a595739890967334aa8511a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA310507220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7518bae790ede33b47b0a54d7d4a4eaa0a9d0c42a32cdb8f3393ae3c3a43c3c9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TWA310507202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1dba2511b421180807d6280cf77e9db643238c17b4b20fc364df57134a7985. 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/TWAN77110035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12be6e9e8bf88e9bb088120aae23aefdbde45545e2cd943449b88511c9608eb9. 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/TWAN77110037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ee193e652bd9fcaed0208368cbcf635c022d33d56336379bd4a901fdefbd8c. 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/TWAN77110038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807f17594b706a488f0bc022d52364aec98dfa50b3883b4299fb534d767377b4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWAN77110036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3389723458a73d4fcaea3bcf6314ab8944f33d38031014e4cab90e9359cd5a7a. 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/HKA610000880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0034ff0480b18141e6d2c568361781a0aacf7d0cee83d40ab7c5c6dcebb0a9. 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/TWA310510502.