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 0xe4389f5cd2b908e5b74ddb04db66f5268f650fd67de6b03c97e92515028b29b1. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ed34da4-2e0a-466e-8380-cf1750d646ac.json and https://artists.proofprofile.net/proofs/artist/4ed34da4-2e0a-466e-8380-cf1750d646ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Visions of Michelangelo for Viola and Orchestra
Slavonic Dances, Series I., Op. 46, B. 83: II. in E minor. Allegretto scherzando
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 0x8bc51188f5065a31c07966d916e5d41f0de5d4b399d3102c7535acc974a2dad6. 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/CZA162300763.
Slavonic Dances, Series I., Op. 46, B. 83: IV. in F major. Tempo di menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838a9aaeac6808e6eb3fd76fca242cf8f12f6aab15fe58cb2f58d7a521d83521. 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/CZA162300765.
Slavonic Dances, Series I., Op. 46, B. 83: VI. in D major. Allegretto scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593c7ec4fd5a26bb1c25088c9cc1d627376bdd2e28337d8691d6c287d801484c. 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/CZA162300767.
Slavonic Dances, Series II., Op. 72, B. 147: II. in E minor. Allegretto grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535757c1249892a35af6eab6ad97d5c8054b5ed6396bf30711df0ce0f304c4dd. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CZA162300772.
Slavonic Dances, Series I., Op. 46, B. 83: I. in C major. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fba889b3518b5a35572b833fb6cae0b37fd7b78a988470352e0d990f1b0fc7f. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/CZA162300762.
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
Slavonic Dances, Series I., Op. 46, B. 83: III. in A flat major. Poco allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90bf8f5a626e57cdff9e991f41fe5216a4db92745b19086784bb9467676ed7b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CZA162300764.
Slavonic Dances, Series I., Op. 46, B. 83: V. in A major. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0022c3cd7f4f9f3521a825d0283398fd286f9c77894a21ffb80a1cd8c4c0ae9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CZA162300766.
Slavonic Dances, Series I., Op. 46, B. 83: VII. in C minor. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0444e46c4e510cbb40c7b88c44874239098e108e5f5f42d44c180fc5415af57b. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/CZA162300768.
Slavonic Dances, Series I., Op. 46, B. 83: VIII. in G minor. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fe12ef3d769b54a422e8dc49351bdd422697744735fd2fb663fddb9db9b4f2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CZA162300769.
Slavonic Dances, Series II., Op. 72, B. 147: I. in B major. Molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb5bbfbb818f140873087dba96a675ef307fdfb19e311b81b867170848ff600. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/CZA162300771.
Slavonic Dances, Series II., Op. 72, B. 147: III. in F major. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3d4c8ac16acb0808e6f1784fcf1012f7e152d6887c00315f6d489022ef831c. 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/CZA162300773.
Slavonic Dances, Series II., Op. 72, B. 147: IV. in D flat major. Allegretto grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198869b94477fe190d19a114b7d7d59851e80f08759f2b650f649298e201e68a. 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/CZA162300774.
Slavonic Dances, Series II., Op. 72, B. 147: V. in B flat minor. Poco adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c06dd4fb4a1bea212047dd99afda452791eff1f54f82bb368e58c9fe0d8903. 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/CZA162300775.
Slavonic Dances, Series II., Op. 72, B. 147: VI. in B flat major. Moderato, quasi minuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fe3f2b0b1c1202d09d500e25acf75ea227a51bbf498ec7f198fed5a8dbae41. 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/CZA162300776.
Slavonic Dances, Series II., Op. 72, B. 147: VII. in C major. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9928f7d017aad814e8b318a19ce41d77e10f86baadfc3effc51100c6799ec09. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CZA162300777.
Slavonic Dances, Series II., Op. 72, B. 147: VIII. in A flat major. Lento grazioso, quasi tempo di valse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2638299fe31d320c27bfcab0adf8516a9dba601f6aae50669215c964ecab0969. 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/CZA162300778.