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 0x27f865f60266ec2e259d78aa3fd5de186497f8b90286cec348d8bdc4b444d718. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73a8462b-45ff-403a-9942-7fd8193532db.json and https://artists.proofprofile.net/proofs/artist/73a8462b-45ff-403a-9942-7fd8193532db.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 0xd520daa327d1d8bb2e037f222c619481fe9b3a7427fa8def344c415665d068dd. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/RUA1H1801326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456bafb75b10aea3a0a890d18ca8598157a8f405bcb9ce353b1665f64052fc92. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:04:20Z), 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/AEA0D1893048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab4145164c0c003cadfec28b4cc7524f1cda2a6587749ead0e4aac0a975b1d9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AEA0D1893052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cf7ff2b217e71cdade6c56f8cadf7bb60bf71b29d34edf8160293553bc2338. 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/SMRUS0065364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d154283d7360753d4c0117a6950af6b8f63d21414cbf174f4eb5ab3479a72e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/SMRUS0065367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee3b87d679d1b2360488a730a83881b9a4a3614d932b9b36cd5e9ed9c5467ea. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:03:03Z), 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/SMRUS0076891.