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 0x6f9502967d8daa3bf223c2383ce7401e17e62e857bdd86d03b6400b2b9ed816c. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d409498-2cfa-4733-8dc2-8ef0a94fcfc1.json and https://artists.proofprofile.net/proofs/artist/7d409498-2cfa-4733-8dc2-8ef0a94fcfc1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La troupe de l'Opéra de Paris : Andréa Guiot
Bizet: Carmen, WD 31, Act 1: "Sur la place" (Chœur, Moralès, Micaëla)
Orchestre du Théâtre National de l'Opéra de Paris
Bizet: Carmen (1964 - Prêtre) - Callas Remastered
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 0x820c98438012eed7db348c0ce6eec5789ec1d825b0ef014c3fad0eafea8bae49. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAYC1401096.
Bizet: Carmen, WD 31, Act 1: "Parle-moi de ma mère !" (José, Micaëla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad902a8e12491afdbb59b18ff5505328bf5564606be8dd5bf6790dfcff25938. 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/GBAYC1401103.
Bizet: Carmen, WD 31, Act 1: "Quels regards ! Quelle effronterie !" (José, Micaëla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecf9c8e40476f570ff239e7515c14ac1febb9077d279203d67dfad5e4805a97. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBAYC1401102.
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
Bizet: Carmen, WD 31, Act 1: "Reste là, maintenant, pendant que je lirai" (José, Micaëla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cdc6883ba43eb3aea9ebfb4c43c616a15cfeb3e3b0ea59bb20ab5803535301. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBAYC1401104.
Bizet: Carmen, WD 31, Act 3: "C’est des contrebandiers le refuge ordinaire" - "Je dis que rien ne m'épouvante" (Micaëla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1129c5bb7e3b7aae2799b706a90bb64466923d633a77ecbf8ffaf25a21223e. 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/GBAYC1401127.
Bizet: Carmen, WD 31, Act 3: "Quelques lignes plus bas" - "Holà, holà ! José !" (Escamillo, José, Carmen, Dancaïre, Micaëla, Frasquita, Mercédès, Remendado, Chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f0e08928a3f964a783bff4d3106d5194e39b13e20a209c3991aad423f3fac5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBAYC1401129.