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 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 0xa5110320689970c9bedb345ac9fa923b9b1496fd85b52a7a3103b7a6a798e2c7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7092e32a-7dd8-4363-988c-0ac922d17fd0.json and https://artists.proofprofile.net/proofs/artist/7092e32a-7dd8-4363-988c-0ac922d17fd0.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 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 0xd4a90b72a938f5ab854330e889f26ac4bb26a9560b4f9f58879041b7f9f3eb70. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCO91463705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf159db01fd613464a999c0ac33a9060ce68e0bc576fb692a4500aa7e9dde8e8a. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USCO91463706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2cca1a6818373cacabdcadab51514c131f26a68f8e07ef09cc03154f53e42c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USCO91463707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf502433bbc997ee7dc4fc55c9e1a43f587baf4aad0642a16667b93cdbb819166. 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/USCO91463709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491bb5716a4bb31e9d6ccca494c10d0ebd5f9970b9782d7dc937325f0418bcc1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCO91463710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b878c2ece1a17f9e8a59d46c341ed7d966df05681ebed8f7f8d66d9d1c0efdf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCO91871801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716c8ccdae50c1ab33b33d5eb09e0724faee2c279beabbfd8a5135a8f01d6ff0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USCO91871802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bfd606c49d27dd17554f39a4dedac7861ae37d7a52bc890ce9eb6168c93bb7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USCO91871803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4fd1844ec0b74aeb925287808bb2e9899e52bb25c3aebf344015e5a92540f2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USCO91871807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5576f00b157d99d864d76432ac84cde52b17e1f8b10d4dc1c442c8947d07bab7. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USCO91871809.
Honeysuckle Blue (from 'Let's Go Dancing' the songs of Drivin n Cryin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be7d829d7e4cfe6233b3d9ddd1fc1355fd722fad8687ca726d392db5974efa2. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAHG2308887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70b8f01e5f1f1c518d704d8723f57f23a46b1517be625c2cccfefccb676900a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/USCO92483302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f9ee60dc8648323e9d1bac6a9d1a9be3af2a81cbc4c66217a2e19989fff159. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHV62500255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ad2df9974ea1fa21b947ab874540b19ef507c84876941b75b5cd55e7a1ea27. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZHV62500263.