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 0x5b81d267d513e5931e675acd5441abe7a4cc20c989ad2b097cc151d321564a63. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd6774e7-1f1b-4dec-8806-492cd46ff160.json and https://artists.proofprofile.net/proofs/artist/fd6774e7-1f1b-4dec-8806-492cd46ff160.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 0x69862a7c0e00acb4a56fcc16fd961a2705aaa1d63c1058ba58c06e01c0833715. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPK2062318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05ccb61baf4ef90b7e7cca741abb7c0296885457646d613084448a89581861d. 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/TCJPK2062320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b821a635125bfd3fb292d513fa47c24b2d8d0f24d84dab37364777bef67c702. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPK2062323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a2f3fa0d483bc1bacbfda7f9e1a6bf013fa706784cad093d8a008c60d48472. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TCJPH1883212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af6bfb4c4776d36ecd6bc5eb74a0f0c79f6f99cc5cf8c915e29611b9702dbd5. 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/TCJPH1883214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e93781283e515bc934c66b0ea7f37d671882f1ac2528a8d8c700f2071b767c. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:30:21Z), 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/TCJPH1883216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934e7f63bb34946ba3d63c21abb91adf7aa9612ce7ba6fef29941663fedcb194. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPH1883227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ba12d711cc63dee907fd1d6a215188d077604d16b6ad54d92171e02a23bdc8. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TCJPK2062346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145586a17a387718fd9c35219fb8a5b4090134e47d238b87f9c48b2abbaef0ae. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPK2062348.