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 0xb546c965960a8bf09ccbb1ccd90601b7dd6ca70f4666365cd783dad46d7a852b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d23f6556-0226-4f98-b08c-ddbaa98a09ba.json and https://artists.proofprofile.net/proofs/artist/d23f6556-0226-4f98-b08c-ddbaa98a09ba.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 0xd83d363349bb4a388b81453bdf4a8838d588dadd22f2ee0dec055fce18242b39. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE6SA2494211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5d10662b23bad0bd3032839cee38dadd188d10540a24932c74c22de8cc4c91. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE5BU2511751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5d10662b23bad0bd3032839cee38dadd188d10540a24932c74c22de8cc4c91. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/SE5BU2511751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28629ee4c6ae86d5535cc4321959bf1cdc81bdd4dba0d0bc5f272b589d3d493. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:25:03Z), 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/QZNWY2509896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8d504ee99daadd6386bcb481b7dd3cc0fb534886cc20493d73cfa13cd71240. 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/QZTAW2577720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b836d41eecf2e26e040a17aed63afd1037fe04388f0506d97e8f80be7d69ba. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:27:18Z), 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/QZTAW2580820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ba72f671e2aafff88644fbe9969829e31f0d885a9c33baa88f157f8d8cf077. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFL2546347.