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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aeaeb517a334fd90c4d7ba6376d7d2fff1bf5a8050280b0ad02c4f3ee4132e4. 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/29a595b7-985e-4cea-9f9f-833f51ec5325.json and https://artists.proofprofile.net/proofs/artist/29a595b7-985e-4cea-9f9f-833f51ec5325.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea64cf652bf904b73bda2ab2a4b801cf405c004c3694129cae8bc66cd1fc21d6. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/DEZ651607335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259e4b9ffe045352e4a1977926e849818e46cb7fc6ebd6e041f804dd9be57e5c. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DEU672400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9def93d0c654da7087f50c49ab8dab34bba0d881d6b0e0f9a3c5c8fd9b715300. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T05:00:46Z), 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/DEU672400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728d8888e1fe9ab2d366f88ff13431ab4faeaf1c17673a4eee4a015169067c4f. 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/DEU672400059.
43 Katzen tanzen auf'm Tisch - Acidbogen (Pt. 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441ae900319eb4e2c11471d10cd082fa89b34ca905e514995fb209b46f0c8d3d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DECY52003252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5dbc47a64d2b8849e0c1a30fa9407cdeefab0f46398d3d4e925813313a1b10. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMBZ92011741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548d35d61229440dbefb005429ac126e01b0c0536cc2640a40ff16139819f823. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEPQ61800661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa249b464a2f4b7a4e9845cdffe160a13a9a9298a2e2bdd545aff0fd138fff729. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCCW1610978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96af41fe0731f6d6954200704cb901a4c78e1f08a05a3acf715140dae4f464f9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAET2052090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb552b73e03052bee9c84d9fdf2d38f588c8327bc237f0a7f971019475be9632f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US83Z2512602.