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 0x77d49b32e375e73b9e55f4c42cb27cbe248ca045c0ae38d196c04f9266e28ead. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0cb561be-9da9-45f3-be48-c17066815718.json and https://artists.proofprofile.net/proofs/artist/0cb561be-9da9-45f3-be48-c17066815718.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 0xdc522195fc37e2ee859b13b148345c38fd849d1c8d89925d76b67702a7a26c97. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:43:22Z), 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/US7VG1598930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc74634412e6577c4bc0232931430e20dfb2414628e2127af999c6eb2317e53. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:32:31Z), 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/US7VG1598936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f140449e984cad3080f914ec4476400c3eb4ce3c3168efb1c353a806de6f2d1. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/US7VG1598263.
Os Sinos Tocam Blém-Blém-Blém - Playback
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc321f0e248fa814347602f5710856c80869e0be8e8f8ba575aa484eebdd1bec5. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/US7VG1598268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6904c319ce601c3be143d5ce0983d9b76a35df1884e897205d9cec85fcc041da. 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/US7VG1597443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43f534ff18b6cd48d3c768ace47831791fb27e9687bbb7638f0a00d9186742d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/US7VG1597449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1bea5118e3c27d176043f8319349beade563b1bdc90e3685b0fb33bb59abad. 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/US7VG1598237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b83ae981a02f69a62cd335c8ff673b074da159acc9c6b72de8b1b7de2a24db. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US7VG1598240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db8073727e35d0e99d6ccaedd888677b98f052e0b8216d2ff2d196776be0de5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US7VG1598242.