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 0x67111b0fd53e96a66b4d5523e0a27f0ff8c10be227bdad7bda3d4720c620dadd. 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/97078e8c-fa77-49f1-bd53-da35b37414f4.json and https://artists.proofprofile.net/proofs/artist/97078e8c-fa77-49f1-bd53-da35b37414f4.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 0x9f26d70ab0a83d719b4c49b7692e51de5b34df18ca294c3c38b3d27eed7e99be. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLCK41052461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4047c07fb5c7e616b7be3f7361c8cd486e8894fb66cb6b8574e074a0ef10f3. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/UKN6K2100589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcae23a783604223cb921640d6caed37e84f77be567da3d5263b032912e3bc6c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/UKN6K2100591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe566e81271f9fb670587bed7d42751a5dcc82d4aec87b5084321e3c0eab4f29b. 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/DEMM42201073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6befb92da93826e0523d091f728ee1d5c3326ae226be21ceb35ae30c730d59c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:46:20Z), 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/NLCK42405925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd728f12a0fa5d8b6afcdfbd9ce43b4ef5cfb26b91f8de8365a0881d9a19208. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:19:47Z), 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/NLCK42405926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd728f12a0fa5d8b6afcdfbd9ce43b4ef5cfb26b91f8de8365a0881d9a19208. 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/NLCK42405926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d95b9b6468406b6c5ab49aca6afc43f6f3d36e1fe25efa6c2f29d8d8b1b0586. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/DEH742502171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fe8a5c35c2da9c4586584069fbd29fc97649f12d8c10b8367e6fca4664e34e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BEC292447036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bd8addea3666d2cfca9461944ef720e6009ed141b69e9e7cd5d4af455ea079. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLCK42501414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a84b2b46d7588488eb0dad4fc6961da4d0db735eafe7dc38e7686f836bd7a9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/US2392100108.
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