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 0x27ccb9cdd38ea55f813641ddeced09350c48047f9aed12e224617df85affcad6. 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/bb79d546-c06c-4ce7-8aa4-912c19cae702.json and https://artists.proofprofile.net/proofs/artist/bb79d546-c06c-4ce7-8aa4-912c19cae702.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 0xc786a0eacd9b374cc216e2793da0f297aa2f87629b3f7bd80bfda8cc5d8335a6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZN252000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1651f6755ce395bb187c176639d31aa5c3efeb8da7e4d185e2a17d1b806ed00b. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZN252400063.
Drinking & driving (feat. Pietro Fichtner)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281f6ae14f35a4ecffc532cc0d0a6608f74a12dc4198506470a8594901d85b6d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:31Z), 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/US38Y2409527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7068e9f0123387c3e08ea71ec223fe62c4cb5f006007579cd1bca31398a250d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/US38Y2411388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc74934253cb0f787a1bd58eec7d8ba1311ba7203ee40c562fa187c790a37a0. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:27:29Z), 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/US38Y2411389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ea9c4b36e5c10186e16eed4a5941d74c6897a758f5442437f0c8d17cdbc530. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US38Y2412629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3547227eabaaeaa675a96c5e6c8ed596b5a002e01e05b1abe4de5a5757b3b1f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBA2572030.