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 0x7d75532942dfe39308dc0e249a3a7097b17dfb6e3c317c184ed868f29322b762. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1472fe36-210d-4d13-b523-d450ccbad83a.json and https://artists.proofprofile.net/proofs/artist/1472fe36-210d-4d13-b523-d450ccbad83a.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 0xbed917c18b85fed47e1d767d048e17fb998bad956efc570e10832ee7f7cae400. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJE2535184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378bc5a7a600f25168e71e31bb0f81408699e803f848e4adb9486172ff94d87a. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJE2535192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b227a77b9205b39778085ebda1e4f61a35fb2f9fd18d42274ef1c9a83d22d2d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJE2535193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4e5746370acfe237660f3989af8c8163eac750bf300011952f1fb89e5ba4a5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAJE2535195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69fd6643db2feacb839aebff0e2e35ad7396931ec35dc775d04858fe332000c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJE2535196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85445ef8490237bb356d8e7d2584753d347052afca7351b29dcfc1d6a08dbb2d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:50:18Z), 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/TCAJE2535199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e72c06af2d00e223f82f5278f0dfdbf0520cb1c507c2f493c1890d577ef3545. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJE2535201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc860f7f498635ba31b6bc50c196a364dbe974dc3bc3e53c5bb29d0edc6930016. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:11:43Z), 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/TCAJE2535203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9389bacba6cb3d97c92b2c0afd0eb81333bbc943bdb5de309da7c31cd9bf66bd. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:22:17Z), 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/TCAJE2535207.