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 0x4e136a0deabaa5cd24af11de2ad42171e7d00918209c177eeaf6ac3bb0fba45f. Chain 2 (Bitcoin): anchored in block 953627 (2026-06-14T11:43:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2fb62abf-c37c-4a21-abf5-ebd480f164d7.json and https://artists.proofprofile.net/proofs/artist/2fb62abf-c37c-4a21-abf5-ebd480f164d7.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 0xff9d9015c49833f6f90944546aeb57d1f9fb626e6ade4ad1a846a6e60f1cf249. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZS662250414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462b6c4d06f06ecf2090f92ce01ceecf51acca8608f4a478c86226a56e7dc1db. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:49Z), 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/QZKDK2245884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cce3dd3301a926ee383a31ad3cbeccb5da5a4d3b05e3e04fa32f4909524dacf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM42K2233610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ebdc18226d2268f801946d6187f6140fbaa8358c10ebf472b17b848e5e19d2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:16:18Z), 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/QZS642327437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de423607b2b05ee36acbfeb672490a016ee7e84296c8a9277c0f833333f53cc. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZK6G2376466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47994782fd25e869cafb0c81ebaf6e5906a83afa46cae3bb6f3dfc9c3540d0b. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZES72475168.