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 0x107bb9fdbe21b0347a6de3d8615720f1a9a5eb67cef86b8a667de0e60e5c1380. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/824a4135-ed27-4501-b0f0-3e36fc7df524.json and https://artists.proofprofile.net/proofs/artist/824a4135-ed27-4501-b0f0-3e36fc7df524.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
C.P.E. Bach: 3 Sonatas for Viola da Gamba
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 0x25097ed17f2622a8fa7e321f70454b71d1c4de7abf407121877f8fda40c711c2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES7141500005.
Tenore del passo e mezzo & La romanesca (Arranged by Javier Núñez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336f32a2063f88e4c57d25c141790ad8c60ddf9ee687dee113562527c5d4d523. 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/ES7141500002.
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 0x4caebbe5f76a019f0e2a45c2d8083d75bfc39129276168c8cc33b898cc6f6be7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES7141500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730332abe9294e1ba853ec713b24e64b5a624a674d2be3cc2ce1ab62166d60b6. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/ES7141500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e972d4258a682a834459f5271aabca9b2755b9e39b6604b14b72cba9684589. 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/ES7141500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4588058ad76f6fb5b42d6021f1ca2fdaef7d16a7b0adc980a2ed4549efaf50a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES7141500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e073d68121ece3116b3010ca566db5beb32bbd42171fd7db39cc31d520d5ea. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES7141500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09048bf812f05f34885c1723dbfd30796dc14a7cc1c7853faa820cc90e666dbc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES7141500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a21c77d68e314f58ae5a675c32d2d25bf446d30bf6b07f621dc5a3fb2c3b31. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ES7141500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7092b5eace6b377813d8b2ec237c14b128f3525851be9942041d99e30a585082. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ES7141500012.
Sonata di basso solo per cimbalo & arpa ò leuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d453a8ba77f557e1f58cad843c4a0e5a501ea7d2ff238c4ac740321a3d3cee. 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/ES7141500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f406e5487c45f51999db148210664f000c96eb3d03cb911b33d751c96fbc06. 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/ES7141500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f527e83c8b78875632b64347a03400737ced6b3e0a7c909026b62b4cfd39b2. 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/ES7141500016.
Pièces de viole, Livre V: XVI. Prélude en Harpègement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc907b09f1689d12b31a9eb29f8a45382b06056ee831e5d10526be2a828f18f7c. 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/UKGFN1900179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d80710428e4ebee81ae89c70192561682adf721ff29645fba0caa6e2a8a776. 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/UKGFN1900181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472096066116471eab2fa2e8c41a8ee086bd664e622cd5f1a5931b25d9b0c85d. 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/ITR551317765.
Christmas Jazz Night 2022: Finest X-Mas Smooth Jazz Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a78caf0b9669b05b2c98cdc6ba6d888b04fd9a08ae2184fae87a1cc82b2164. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITR551415093.