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 0x444d5d390487cd686937fc4376b08623378df74f657d51fb603607605e70cc55. 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/77419e8b-10ed-4b6e-ac49-20bad906cc60.json and https://artists.proofprofile.net/proofs/artist/77419e8b-10ed-4b6e-ac49-20bad906cc60.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 0x9e018e61a5b5fd736466418bdba9e2bbc4b4c19e68038e11caba77a9833b63a5. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/USDY42310759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe492b5ee3295dc860c11c5924d4ca08bb691dfff285a222125c53ce7b7fc9736. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USDY42310761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f64d5359380be246bb8070de66a1bb2f3811c547bb52d002cc91246e72f10a8. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USHM22364841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb50d697f6905615b863ee26d4f3aaf9d4fa8dff162b7a0bb51d876ee77fa70c. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/USL4Q2350098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ef7502b1dd8fd35960671ea9371ca5f3361e25890817bbb3cb50d14cec8c72. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/USL4R2345880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba4318e01b535fd3bc2f5a3bc43227df64d76ed8f43702a47966606d3c2e206. 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/USL4R2345884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73d9c6ffd58317351ed2b9d6c9a6c7a25a94148c56ec066eb9d21a12af6cd21. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:55:42Z), 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/USDY42406238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b12c134d63b08080e529a20390bd2f9d9b3b73aa5fc608d696ee308c3b68b5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:45:08Z), 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/USHM82512834.