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 0x9141087772f4c30163919985b29d3ee1da99d5efe38fee827c2d4ea1fe4966e8. 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/d095f599-de00-44fe-bdea-48826d721ae3.json and https://artists.proofprofile.net/proofs/artist/d095f599-de00-44fe-bdea-48826d721ae3.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 0x72e77fd2b9c46ba3602fb45c13ae5f7abaea34631b5dfb3beafc6204062c6342. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCABR1387874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3004c15e6a50b972e56d587a6709ae964dbff9f0a85cf94e97f33fef5eb79205. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:55:11Z), 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/TCABR1387875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72de3b5e4c1976239fe6e473bf7aca24a90cab900ac13cae80dec9cba6693bb0. 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/TCACQ1664553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8193bb0b5b7056f8e9201fa4b8887d368eb03de366a6892ffc51bce565bcb5b. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCACQ1664560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237bc10ba6f3a4de14c6c5c5614daaa6705f2801a0bd4f3f316db5f7a1966f7e. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCACQ1664562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e03d8d55e4364254b0f0721f15d98351e4f5496d11d6a3acd27b6045843370. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCACQ1664563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f2194a8f2a3f1547b4b8be7665349731d632a3e8eb0badb4808c589dd3cd97. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCACQ1664565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048b59526d2211213d295f4a1fc2584d481b16b85f58aed1d156131d27b6ce87. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:31:24Z), 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/TCACQ1664567.