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 0x7c438c2d4b255364e27ea0af0a323ca8e21fd7dcbb2d21993384f6e8a886565a. Chain 2 (Bitcoin): anchored in block 953600 (2026-06-14T06:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d72a7a9-d3f9-4020-bd35-517eea62eb18.json and https://artists.proofprofile.net/proofs/artist/0d72a7a9-d3f9-4020-bd35-517eea62eb18.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 0xfea8a9df9bacfabaab9c76ba819d3c5cb2738c85cf397265561e37bd5d4d3943. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GXBDT2388261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3fa22a633fa2b0c9bfb94a77fb3f639fb588ae348ca5fde15d17a04c51ef32. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GXBDT2371324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe214add0c08c67f4fab87c4f24b0eaba687ae14b64b269d7a5d1e7040665603. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GXBDT2376854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafdc06ab7d1e0620907074e94a40c611ecd8b1bbac848771dd54ca3e8d1fc08. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:59:48Z), 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/GXBDT2361590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8af8ab90dc5ae05d52962b8a0760c72c026f9d2ce9d49ad45f92eff8ba184e1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:48:06Z), 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/GXBDT2300756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a88f081c32432a884ddf0fc9ebb914b320ccf1ae0fad93b9324716de9d9adf. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GXBDT2354197.