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 0xb9cf613662d50613757f4f745068f1c6fe29d1dcf696046deee29c4cc1335a3d. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19a89582-e9b7-48ce-93e3-8c314c19faa2.json and https://artists.proofprofile.net/proofs/artist/19a89582-e9b7-48ce-93e3-8c314c19faa2.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 0xf12cc0847505eaabc8db773a0b24153d3a43ec46e145ab738afc2d48a02e5ad5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB82484753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3d3d97a770c27255bb1a3d6eee2570f37567c93f10f34ce459cfe6dcff384a. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:40:54Z), 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/QZTB82481012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6dfeb1fce3a1b62038a7e199aed039d7664719751ae3202753a1646b5802f5. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:40:37Z), 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/QZFZ72514452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bb10974ade36e709db67f3132c87ac456ba70825d45d6b2b47b4eec76170b6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZRP42574500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb76fbe6af6b4a2a767f180b52db247d746598b99c1a9e68487a1060f12b12a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:37:22Z), 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/QZRP52588605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc484f1db3456d3fa532ca6e21db54fa5051ec0a7b0a5079e74bd4836db168bee. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAU2505574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b85fceb07d3e8786ad9510372cb1ceee0c5b827fa91e3970825c246582725a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:03Z), 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/QZTAW2574308.