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 0xc8a05ad8330646dbb5af88690683c582f93fa3fb86b7caf2cc0b9f0267a1acb9. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93f2edf8-ed23-4327-97e3-8e6737517f63.json and https://artists.proofprofile.net/proofs/artist/93f2edf8-ed23-4327-97e3-8e6737517f63.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Preludios (Ausz)( Nr 7 A-Dur) - 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 0xc431a112f1929aeda06430b519034f972c77f5c0c1e37675d2bebebb3960722d. 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/DEXO81906099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf564b6a2e543db52243f2faf95586ff37960807d47e97443d6aa197304fd6179. 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/DEXO81906079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219a0289a805569af63a2b473b556b9c852c28be1be7d274921a38c46776038b. 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/DEXO81906080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa711c38d1bdab31068a1b20f3898c3411099cc7b6d4a32a834268e387aaaeb09. 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/DEXO81906082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea460dfc002c9c10dc15cdbc578b49429014b4cc4586ae34b370e4e7bc4e780. 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/DEXO81906084.
Scarlatti Sonata in C Minor K 11 (L 352) (Transposed to e Minor for Guitar) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14a7caea52646dd377281f6558c23ba487c4dd0b1fa0f58791eacbe1de4a138. 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/DEXO81906088.
Sonatine in a Minor I Allegretto - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9ee3fd5aca3419799befbff332cca051a7906590c5a90ca16124d7f897304a. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:05:30Z), 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/DEXO81906110.
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 0x136dc2a31048355e8a02fae679726d0a3d9a60d6a0d5cc0cd6eedc736723945f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEXO81906077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad0fb7da4376a58abd2ee3bf0d591f82f31dd77c8a4cc89a7513f67e9435f24. 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/DEXO81906078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993c170a717dd62d46f6caee5800994ea7a9ca252934251abd8a3ff7af9183bd. 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/DEXO81906081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2d3fee970abd5a10454c14eb2d22ed0f96f0a5180e505691337747ca69f3d5. 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/DEXO81906083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bf199d6fdf3201360a744593666eeccb1ffc73ece6a9afeb425394846f01bf. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEXO81906085.
Sonata, Op 15 (I Allegro Spiritoso) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccb81190d87f7f825230318c9e3c96df289145416d42e2b246ac988f5d18a4a. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEXO81906108.
Guitar Concerto Nº 1 in D Major Ii (Op99 Ii Andantino Alla Romanza) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8077636e2da839edcc38d620cc6b9565fdbcd5903990a08dc42bd364b817148c. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEXO81906089.
Hommage a Boccherini, Op 77 - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bb408ef4a21d7d4ebe5b3ec38a050ba27eca9c0614d9867db0ab44e661136d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEXO81906092.
Suite for Solo Cello No 3 in C Major, (Bwv 1009 _Excerpt__ Iii Courante) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c997cdc847813d5c01b3c99e6b713300f478a2b73228d6404266cc95ac8a2d5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEXO81906093.