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 0xa72ced862d9ebdf68089262e2d463ff2de92232d458dbffdbb9270ff8a0048d1. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c41146a6-33f0-4d4f-8d43-0efe04f30ebf.json and https://artists.proofprofile.net/proofs/artist/c41146a6-33f0-4d4f-8d43-0efe04f30ebf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Idomeneo, re di Creta, K.366 / Act 2: "Corriamo, fuggiamo"
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 0xf2164d49a8a326c6c192191ba97713b581b3f6f9c3506bfa6d6bb247a894f63a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEF059431832.
Idomeneo, re di Creta, K.366 / Act 1: "Godiam la pace"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81415a7b1f16cb100a205b114becc9235678d6e2417cfd485aac75e083a6f2b0. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEF059431807.
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
Idomeneo, re di Creta, K.366 / Act 1: "Pietà! Numi, pietà!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed23db035b4146106a6a5f3db95976fe8019e3c95b0a452b067d040ae926aff. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DEF059431811.
Idomeneo, re di Creta, K.366 / Act 1: "Nettuno s'onori"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647eb76ba8afb3183be622d1d7dbf1580c1f0ad5d90a2756ef345ac9d340de01. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEF059431817.
Idomeneo, re di Creta, K.366 / Act 2: "Placido è il mar"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b32cb279e8b8636132c77217736556131e8423fa56874f0dbcb3c5383f74ad. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEF059431827.
Idomeneo, re di Creta, K.366 / Act 2: "Qual nuovo terrore!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d94edb5603c30ca83cc7858bda492405f0ae0304f9ec7616a0f8b5a4a32e9f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEF059431830.
Idomeneo, re di Creta, K.366 / Act 3: "O voto tremendo"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa992a34265bc1a55e83fb05b033b8d3a63ac8db2301c2c393152336475e06366. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEF059431843.