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 0x243846126311d4b7139a8c358aae9d75e8fa89688128175176622fd06f818a85. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26c52648-246d-42a9-b005-6bb15604e8a4.json and https://artists.proofprofile.net/proofs/artist/26c52648-246d-42a9-b005-6bb15604e8a4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The best of les frères déjean de petion - ville, vol.1
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 0x480a33321daf989cfebaf2dcbe006a8dff63d1d51be638d371ca4004e4aa5cac. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QMHUY1553362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622909010dd8043274063535cc3f0ac414b05a481e99c7a822bd5308627cee46. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:36:12Z), 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/QMHUY1553363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ff874c2819ef10d197c6831452b01dc55d44b84c0b0742522941a47ee7f9b4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMHUY1553364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc81509af3a5120036375a6380338c24a25b17cb8ef53535bbe8c466a936f595. 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/QMHUY1553366.
The best of les frères déjean de pétion - ville, Vol.3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08da76d639cc8e77f4c5fef419ff6ec702390652822cb68039ec86f2530d6179. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QMHUY1553383.
The best of les frères déjean de pélion - ville, vol.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1271bb82a587a03f916372c7008bf8301952e711933bcc2c00b28589d25d5154. 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/QMHUY1553374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a8dc476c90f2f5e3880893d3bbf6716aa83c1aaa7620b9b09505d75585ef1e. 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/QMHUY1553376.