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 0x4e1b4e2bb097dae54cf823d0809d402bec0b56e963befe0053bb43cc890c3414. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1f5004d-98c9-4f27-9bb6-a39989a6ec89.json and https://artists.proofprofile.net/proofs/artist/a1f5004d-98c9-4f27-9bb6-a39989a6ec89.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 0x40b31f7706983c8616207259fb6b784e40ff502935ef8aca1a0bb956a901348d. 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/QM4TX1845629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3e5ff875d399795344422295efaba8bc5403cfeaa272659a2a3bce8cd10946. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEFR11900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c542276a530d9a052c466e7a570092d653d11956c10b7573b60c22421d271df. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEFR11900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c0648b5d8555cef5eaa6402f6d1a895629d35cdb65a13fde2dbddcd73f1ef8. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:29:46Z), 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/DEFR11900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c6758cfb9ce5ad0fda9afb927a1f29d13750439f677ba139d0ed25ab20dbfd. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:28Z), 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/DEFR11900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b4b7a6e39c3807cd4ea103140fa76558fcf96efcf03c92be66707c62e49816. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEFR11900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9b5d55300ef9346d2ffbbcde7ba00e0f41a42894abbc20ebaadcce3b49238e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEFR11900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2db56a47daf5b2f659ac82ae67cbe3a168f6563cb49620af7802f351cfd1e7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEFR11900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dda98127adf93dd377452c1e4f523e156e65483ee3daa747f4141809272a0b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEFR11900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7462dc771a1ca0c1896f7e04256d2c55abde04141a22f5aec01d4efa8d35b7b6. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:18:34Z), 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/DEFR11900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bca9110e8be510a17ee9061fca822cd889064dd3d3fbdd26468ad1d2f4a42a. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/DEFR11900069.