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 0x00732bd8b2583d49797d1285f5338dcf33f13188eba41adc9dc15d284817f952. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/963f3bd6-d196-42e6-b9b0-0f84cdb852cf.json and https://artists.proofprofile.net/proofs/artist/963f3bd6-d196-42e6-b9b0-0f84cdb852cf.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 0x1a67807c2a0668761c86ebb3164d9021f9e9c65f59a8ff462bf18c7b63859c80. 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/QMDA71589957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890431e6910cdc9aabbb2add70adf2c0475036d1cf315934b194c6943230b29e. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T18:56:26Z), 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/QMDA71589960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7ddf4716358d09e83270e93d985d5718379680535b861c67702222c6a9d3d3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMDA71589961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92f902e74b38eb6707029cfae57a69b24a902ccd7793bbe93a0cc17b2a5626d. 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/QMDA71589962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a2ee5a001859ff46dca18ee74da468d5b397b18ee8503eeeeb2ba04b24a7cf. 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/DEAF40100307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cba40a0de60ad1a1522790c0f0cc383b0b6e0a2076b764f4c90593fe5aac39d. 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/DEAF40100308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e62dda388c8db1c05e6fca1d5135bce762848b0c0292a0a521ecbbcf160fdf. 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/DEAF40100312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced66138f998171973cbc5c68126f3b169e8c51f4d44ede972c676ed0e9cb35d. 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/DEAF40100314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3f3291ebc2e0d2dec4b315f72362c22fa90cd66b60529679d6525d08bf7cc7. 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/NOVBE1801030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362b844d0d3a0cbb4b74d27be9487831d5bb4938d4db36f1bafff8bd9c6aecf6. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NOVBE1801060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6802a8552b71180da0028908600da4247695f98cd28641cba836ecb8b3605c. 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/NOVBE1801080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8989d5e480f26df77dccbd419777fa7297d8c33916add333ffffd4334b79a68b. 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/NOVBE1801110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0edd4a7f4aff11b0eb458ae2fad7232aa80946e92fde44dd165b4c8c76b6cf9. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NOVBE1801010.
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 0x5a922bda004aad752b0927ef97d7482472286d5d261619c50a54dd62484c8043. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NOVBE1801020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e11b81ec5e9732dea94f357a544ed968a6278af14e8bb86de7e712bfed35a84. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NOVBE1801040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4e0f1b58ceeb84ad67a27b57df8a2a359f8216ba2c2f1bb5d8ae4902be2c44. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NOVBE1801070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178a96a558524d028b7f0541a3da0bbea176d0ecd1d58803d198127ca66896ae. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NOVBE1801090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35be2f06824225ded89295ba7e41d399331388ceeb463b27cb8379e0ce981352. 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/QMFMG1566264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb394de6eb7fa4a6429b28d79c927d77d82ed19e1d6a2f461c1518434cb54c7d. 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/QMFMG1566215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd2e9413ca67449621fbeb576ec33a89b42be5f8a3c3afd4bc98ba1cb151557. 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/QMFMG1566216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc572d036ffa4d3d9346a209fb6d4ad4594c87f702e6d06f3405577dbe87d3f7a. 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/QMFMG1566217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e324a620ba206c28af21d9e6f2faec009e182811317db6bfaa63639e90c0396. 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/QMFMG1566223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786bd12423cdba194731caf47b382e53eb5b6927a662bd71f25bbff65c6fb7d1. 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/QMFMG1566224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8666979918e37f5de9639593cea852f671af67c7eb4769e278c9b5a894ac6f4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMFMG1566219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23426d7864319e7e6d3d35a4df1ee12f16d6d53f0023eb34ff0b34e8a7290c64. 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/QMDA71589933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa260a9f823602f7b7cd3b31c516a76577ad7c22e9ebac1b4a0d60d0aa43580ae. 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/QMDA71589936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1da5064abacdc89e617ab92d9f5a130f63f20953a8e8945d60471f7e3b0fdd. 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/QMDA71589937.