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 0x4703a4582350a998ba8c41496c24c8c3c81bbbf4170a84a93b4223c9e323d087. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81bce08c-d826-48da-b4dc-c0eadb688d9d.json and https://artists.proofprofile.net/proofs/artist/81bce08c-d826-48da-b4dc-c0eadb688d9d.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 0x53a4f34b8e6f776cd71336f1ce417979452661696e9618c0175a2d73bbbe14b0. 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/FR2X41916361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a12528e44d9a9fbe673d232539685157f2899fb0aff2410346eddd894df75b9. 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/FR2X41916366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0c698efa458d457c8837d27dbed7274975792594007cdca7c5cf8ac8a8ac6a. 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/FR2X41916368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d8f2137f9ea2e1380c3ad7f0295b3367d77ccbe5e8cca01d7c0e74a0f83de5. 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/FR2X41916369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd26c2229e471818eac96a2920d52ec9de3db9fa25e99ebe239f70cd44d9bef7. 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/FR2X41916370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffb55d6bd28cf4c6074b96aeab8ef6477a2473af580f252949e981ebc554eb8. 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/FR2X41916375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d161b6e36c65b08213331e9ad7c18b1febb0bce7313763eb84796cd391e0f6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR2X41916363.
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 0xa82f6b17f907dd778bd7061b4188dbfad5d3319115a2472388e8bddbd27af294. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FR2X41916372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3836bebc4d3670910f79994781ce167db254a0f09fc04dfb19084850de4adad1. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR2X41916374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a735371a55ad1b4095b0011c467324612dd4fb25779548746c4468ce74074f. 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/FR2X41916381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9034584e72a1473514b6b51a0b77cc8473d2f3f79d746946905caabb32aea866. 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/FR2X41916388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3803b7dd289268353a032a42ca0855e606d96374bb00911b1a47ddbbc941a08e. 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/FR2X41916391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d08453ec2220af2ec74b58a8448a7ddb5ccc8f8d364df3cd7f8e2c5251d5bf2. 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/FR2X41916392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0526d50192bc232e34d56acd229341f1b2a43ece91e5703cde1ab908ed1f22. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR2X41916382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cb72d1671d2d9d907d5383b288dea51b0f067bd71322dd7456ac95bd81b88c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR2X41916383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53686f196d91b0dbdfbb1209d78e9218e39b894cd3644f50ff78d34323b8c01. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR2X41916384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb155b1c1fa0d6e0bf484ce8a0707c476c295df990f87ce1cbe3ee29ec820969. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR2X41916385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6d2162fb6332b1c78602f85676307cfc3824ab94ee91a870b5c6a8a21e5d76. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR2X41916386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7550299010db8501045133bceb49748b29ed62f57791096f16b14c3b9f476a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR2X41916387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48310637bf5805f257e0fc2f78d3a8bb832d613ea890c4b6ed8c5b8ed903a6df. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FR2X41916389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e0570bfafdd3380caf9c350b644ad861347730058a307a5576af6768a40dbf. 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/FR2X41916390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd216894a86b1271363d81f5dcca136e213fcba138ad48a7279338e3f743a3567. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR2X41916393.