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 0x54177b0d4f62db0f5d6dd4b7b4a2f66bed1044addba248bef1f48f0af936cf65. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0cb7dbf-d92e-4294-961e-8bb4e11c6025.json and https://artists.proofprofile.net/proofs/artist/f0cb7dbf-d92e-4294-961e-8bb4e11c6025.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 0xcbb7291c3f0f0ae2c2458dc59c1ad289dc220e4a80d808e633b1e8fc487cc3d7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:58:34Z), 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/CA9B71200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f04d256c23cd7e3dc85f0eae7f96126690e2b69091968a8679998282aabefd1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:06:55Z), 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/CA9B71200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9da7dadc69bb7223d1cfd39f6f7e3500243c80ff2e01aaa3f1592e33b943ab. 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/CA9B71200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24f0742a716732fcd83c59bc49a41c8014d87ebe98e8636af838340705c0c09. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CA9B71200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1000fd4e1ed0b0f9bb82b7637ce2ac08cc24f1f17f416d5eb633d03836c0b5fa. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:08:12Z), 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/CA9B71200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee226e96cf7f141f0c65d32262bcd5d4f433f777b6892f32e981caab52631ccb. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:50:07Z), 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/CA9B71200008.