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 0x0e539e404e8af89028d32bb718410f971c8dc72414850faa792d4ee7c8889ea3. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ef29c0d-f523-43e2-a4b3-210f4494c3cd.json and https://artists.proofprofile.net/proofs/artist/9ef29c0d-f523-43e2-a4b3-210f4494c3cd.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 0xd267e13c3899c5341c22fcaecaf8f1dbae1cebe008530a59a4751c69d94dcf7e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:46:35Z), 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/FR59R1732110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0790bfd89f53be27fbd3f9acfc6981824d3279009d567ffc21a253b7694683f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FR59R1732111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f5faab1cd9b0181d8b1aa3e663eeebe8963c8d1b2f7601851ee10c9e072b8b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:45:53Z), 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/FR59R1732105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024884aeb190e090feecd4f4d6648f15b96126f4eeca496b89961f7109a2fc41. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:46Z), 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/FR59R1732107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed17da74fb5f099c43906ffd87a5a007e2c014ceacde8a1c2bcd3a9f9231fbed. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/FR96X1973249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5bc211e0e7821ddcd5b13ec85af00b610892e26d2db5dda5c8b9dc815ab610. 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/FRX282386305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae176a733a31862a280fa34629626d0312837f447a52b4f8832fd34ad5fceec. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX282386307.