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 0x2a2526ff9d796a21011bcce04e24a1d0e6eac1570063ceb95b2430a756c4ef91. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8e084b7-7759-4868-add5-3b956a7c9ee9.json and https://artists.proofprofile.net/proofs/artist/a8e084b7-7759-4868-add5-3b956a7c9ee9.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 0x72c9184b3bba5cc60849be2657f7f7641cca34279e06ed9583f8fe9044efcf90. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCJPH1837868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b225faf194d670b0031acfaea1c86271ca505f1995d12b48c67f94702a7b18. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:53:59Z), 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/TCJPH1837987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08104ea927e59d2dbb5efbc354f5be15ad70bb9957efdc1b6c73b5fa316acf0c. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCJPI1824968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d286318cbe90df6f548303f4905e4f8c0132661153f04f62f480a5e564f7ae. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPI1824981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda92e84fcd03541cad2a0ffa4389cfafc42c616634584debc7b7d767c8df5dbf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCJPW2352968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bf84b4c88d07491aa46809ca4d0d759eab8ebdd92036038dc21acf3421a150. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPW2352972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063ef4e55762cb63f62fa19e8c7397e746e410b883dafa684757a7b0087dfc12. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCJPW2352980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3255623d3514979ebe9a9821a9b0b98fdb3e20fcf4419631575441b454cf0f1f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:08Z), 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/TCJPE2520376.