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 0x38c6034239219ac9aa5208f44cfc9e3290f84043436bc119354746a048bee65b. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0786dbbc-f5f5-4e81-9781-65f9d2f4c4ee.json and https://artists.proofprofile.net/proofs/artist/0786dbbc-f5f5-4e81-9781-65f9d2f4c4ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Histoire du Soldat, Pt. 1: "Voilà un joli endroit..."
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 0x0ff030fbb83db491e7b74715dcd0cd13daa631995dd5e3138bfb1ad6e2b661a8. 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/FRZ139610510.
Histoire du Soldat, Pt. 1: Marche du soldat (reprise)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cbdacf3af4880f365f2df863d50f40f2d33b1bd353a3119fa417eb523c900e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ139610540.
Histoire du Soldat, Pt. 1: Petits airs au bord du ruisseau (suite)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da1cc8e58e3c500f3c3d940ef534d21bda771d91b1c9813c1552d4ed9169151. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRZ139610600.
Histoire du Soldat, Pt. 1: Marche du soldat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25347601ca14ce5e984e383fe8333883043809dd7b470ac811aaff0a926c7f37. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRZ139610500.
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
Histoire du Soldat, Pt. 1: Petits airs au bord du ruisseau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7df34b239c25a3231d85f2fa29360c723bb99c1aa91e935a9945bde296753b5. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FRZ139610520.
Histoire du Soldat, Pt. 1: "Donnez-moi votre violon..."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfffad84564bb0c7ded2376c735071d1a6cec3502bfffef9ea14f47744ba251. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRZ139610530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2812715cb5d84f3ceeaeffc848697e1fae381ac87dfbc2f6c34de8bdc4f43b4b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRZ139610560.
Histoire du Soldat, Pt. 2: Marche du soldat (reprise)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965da4f7319b22f138d631d28ca8279647c07dfb42436161bbeb68440611019a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRZ139610610.