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 0x3e269b56845f282d1ab420bacf3294cdde8e14230285d09f870feb993b81f188. 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/5209c99b-c092-444d-aafa-11bbba43008a.json and https://artists.proofprofile.net/proofs/artist/5209c99b-c092-444d-aafa-11bbba43008a.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 0xd8c0a6b87aade926d7420b77e5f217c914cf7f7d4b8875b33a2d7bc762f80d6b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/HUA611401367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51963b0ab53d1b4ad85354a955c89589c1ebf1fdc5790126d6489102bcfa709. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HUA611401368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8d7be71549c0611d0002983b5c90877241d512e58dd5b7551521ddbbb992c7. 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/DEOT31400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078fde47173a3487ab75ce6b1dba1b109712c4a7a93f61cdff5a255e87351d15. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEOT31600190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca4f56135d4d45400e9791a5d918d37818dfbbc6039e34017524ab52ed8dcf2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DES562014501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6021c5407cad8b491f17073ba119ecf05741f9bf0e6571df0b10e1cdbbf29d3. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DES562014502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee10181c6df378cf9337f78885add5f8db66fc51e7478a0dff49418b0e390e8. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/DES562014504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a81af25adb2bc2b1a5cdd62984eff1d6bf598b517bddb5c0789414d9e6e5da. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DES562014507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcada13b58013ab33d9fb874b934580b88cb6d75076989105541f4cddce53cb02. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DES562119601.
Black Nail Cabaret & Friends - Woodland Memoirs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5317f7e56fca119bd7b287201ac3e9bc087221a13cbfc0346e5d6fa461b0a4. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/DES562411397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2d0ac86fc23b96546f0ee34a04b5967d3d18f839f0a4e6fc20b4063a3edf9f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DES562411398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d78a1c61e7ad18c7cc6ee2facbcbc5920214d6abfb06f553540467e2aca072b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DES562411399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fd9d0ac3c1a775229ad90feb90128e6ae24dfa947e36aa3b1138d732eacdf3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DES562411403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49b06e7781d12beb1bf46b6fffcbc3af3961a1a1a6c7f7da1c74979969c9d47. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DES562411405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925e0cf4add4183929e3389b23e243cf3fb73b836940ae8974386f46dc96e624. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/DES562411406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b056dd72b50b0792cf5e3d60ba6bc5d266ef510c3142586320492c4eb94041. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DES562411984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c71956eff19db5bd00d4a6d35b93e339d61272bc0065c229d026d5fde5a187b. 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/BEC262186633.