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 0xad75509a6dae3bf479ae42a88a16b3a2671b460112a137b002f7843171ae99ff. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cc1994b-25ca-49ef-a16d-931cd4c049b1.json and https://artists.proofprofile.net/proofs/artist/3cc1994b-25ca-49ef-a16d-931cd4c049b1.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 0x620a254085b8ad2f69bf24f7ec81a4f871f155846c2325430ace3f68e1d314c8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:11Z), 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/NLRD52417762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6273b424dfd57eb0b041790a4855ea45fb07edf40dbdb4fd80a4e9f02ce2be33. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLRD52417782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05df14bc31fbad5f9ed13a7e610cab638e5b9c0482c7c31dbae8ed5a8a0a22a8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLRD52417840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3c84d676c54f0fa5cf4774ce6042b820b23d10e538a1c1dfc0702b5215b3de. 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/NLRD52419245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb612b9779bf43cfcbb8705c098779c6804496cd1f9f9bb66d9ddd8e0bc190b50. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL3M12407729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a1a1301e102c47068662e0211a9e52f6a6bc3895ec498d877c8c7055e9aa4a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:05:26Z), 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/NL3M12407769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9812f6154432f5c8fb07c195811b9de2deb82fbd8bdea024c77fd07bef56660d. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:54:53Z), 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/NL3M12407809.