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 0x09662a0a4c23aa3a416d225f2d760c231540a29eef72996d69d40ab5c9f0ea99. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a57ca40f-a48f-43f3-8cd4-805ceba2aa0f.json and https://artists.proofprofile.net/proofs/artist/a57ca40f-a48f-43f3-8cd4-805ceba2aa0f.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 0x9e31a06ddba2b895ca515aceef5ff8c09fe867df0ef068880a5e84d8da8d2080. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:05:31Z), 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/CH6541644271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b102a7a05a305201f262a5821a16553d667aab5fe49e45c5eeae4ef68186d1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CH6541644273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213ce7b805cb3d8c2f900227b3176f29225723e1381bc3da27f6a90283f042ba. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CH6541644247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb729674f33b81a76843a3992046bc5edfb1eee9d13608e39df5004102787725. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH6541644248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbcaae0bb05883b32ecce4a3398cddccda35b5f0973d49430d058a1cf89a5b9. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/CH6541644249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df560bfa40f11d27e48e57d067049e6207e1aa79c90ffef0823c3cc9693d2b9. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/CH6541644272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2e149f8e79028b43c34dd32d9e5dcfd08824a986c8ab04deb8773ab063fce7. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:42:53Z), 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/CH6541644270.
Oi! Ain't Dead, Vol. 8: Chaos in Nederland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1858662beb2686159c982182d6d1bd1f17c1058f1e28b978d22583031e9b69. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CH6542371235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36293edef09fe0a4eb5116681b8265e1d0ee4f0252719c08a595bdb10551564. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6541919610.