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 0x2f12129eb17b9b34a8579557bc1e7bfb05420dd9e1db58cc3ef6e317c8b1b2b5. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc35e7cc-2406-4976-87fb-ca2e448a1c89.json and https://artists.proofprofile.net/proofs/artist/bc35e7cc-2406-4976-87fb-ca2e448a1c89.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Puccini: Turandot / Act 3, "Nessun dorma"
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 0xb1e219b8eedc938ffd39080e35a9d1f3abb44e7b8460a7a8f6da2fc65d4f07f3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEN961800330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ecf2397762cd0e3bbb1d2d473901dad20e735065a30a5cc0b1a15dd1ee5dd7. 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/DEN961800320.
Non ti scordar di me (Arr. for Soprano, Tenor and Orchestra by Giancarlo Chiaramello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f7a60ef7cbc55bf1d7847a9797e9f472235838653238376947ed0a86d5c1d5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEN961800310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92f257da19becda39ffc31f1f6c0a2d2411ea7bc9f290cbebdb7a45a8019072. 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/DEN961800340.
Orchestra dell'Accademia Nazionale di Santa Cecilia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081d9e1b75d2199aa21fd15a7081747fe5f9f5d07f20be1217ce5d5777745cc2. 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/DEN961501950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7498ee4582ede8f1c9d6878a004927c5375fafc354ff35ef3254cd5b7a825c71. 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/DEN961501900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058767e2fa119eb3b440f795aad3c652a84426f2e7192dce8f2285a51dfdb565. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEN961501890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb1ff64ad4b732e94791295396b6fd5db97850cb8a488b1084f3578b5d4e969. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEN960730311.
12 Songs, Op. 21: 7. Zdes′ khorosho (Arr. by Michael Rot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5817c745fb22b5ac369d21c8d2a17397fa646bdefd9a9bc2432798d05bae112e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEN960630902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd200dc80cea5d9cfa053b6af970522e74240820738ad57a8e88e4946f80e2c0e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEN961700290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3354320c921f9084395bd5d194831b50e031fe0d312f67a1b828f7a5702c213e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEN960800320.
Lakmé: Viens, Mallika, ... Dôme épais (Flower Duet) - Excerpt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ded58f74d2a481619d9a51c5d27aa0a389796678da3caab6ad9cbd4870f5a2. 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/DEN960730815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db1855457f830d103133174cb7d46a67aeb0960309f79dafa24e9d3d1b7c02b. 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/DEN960730816.
Les Contes d'Hoffmann: Barcarolle - Excerpt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3469182194c9dd52fb4a55aa916d511332be8bd82bedb685f6a7d23fdd17c3ed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN960800301.