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 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 0xb619812347792dfc430cac3b4bb712944203a1ce00fff2052e8bdf36047402f8. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb7ca328-042d-4e65-954a-be25060de3d1.json and https://artists.proofprofile.net/proofs/artist/cb7ca328-042d-4e65-954a-be25060de3d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x02af5862edebb16c5cb8e98a21e0cb385f7cd4aaaaf461118408c7c673751061. 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/BER181435501.
Anchor che col partire - Based on Cipriano de Rore's Work
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4f8f264b139a9348c3a791312b084429a61475c221ef1e8474e39ca98fb347. 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/BER181435502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474385ec7fca8f92205e6b4fd734bdf213d426b2706220c671cf9c4270846637. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BER181435506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9108534b9f612fc918a4962bb529769b5bcbcaf13813f707a0f34fa68a5f68f5. 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/BER181941501.
O clemens, o mitis, o coelestis pater, BuxWV 82
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbe3d4f532edb335a69e8a5efb53fbe30d4d57a6ca728b96b6446bf3013fe79. 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/BER181941502.
Dos estrellas le seguen (romance a 2,3 & 4)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc514f5abda36beacc4c5dc267a364c04b4f02906fa881a92563b5765292a1772. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BEE641416905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bda565eaf20b56bd5230e5ddde9c2d09fae520fa7bf0b552aa9689da210e6f. 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/BEE640800418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fe8dbbc2c5e94ff7c6fec2ad2e400a5fc8e580f5ab9e324ff8acf9633cd03b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BEE640815616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08389bff25981d9daf8d4694dd04c25c0d93de421e34f78b21c61ac1ceddaa5c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BER180930001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b1a97c5ada6063f74bb6cc089c0e9782653d8a2b373ee14362a2e3b6feb64c. 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/BER180930002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3663ed78c7e12b25ed598f3253b4d76e183e9ab03e2eb4db252c9efc415a4ae0. 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/BER180930003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f586165f2edceeb67376e5dac659b23cd5773102b3eb8a8b45d419ec8449c1. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BER180930004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ec13d6d1a8390a998d5162ac90690bb64329f2c7bbacc98eb28196ac3a719d. 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/BER180930005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee181f9c9316227d94d21abd8ece816ab9073511916397483e515ea233de98b6. 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/BER180930006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570ec105733668080cf5901d03125bab309498d0c7cf90af89112a94a45ea897. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BER180930007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bf4fc89645eb110c5c6de9a072badbbbcb2caee26d9dccfa4b245a733da5ee. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BER180930009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f918d7dee723e87d40a2850c4669940aa32c0fb38840171f602c0fec5767025. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BER180930010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5f2328f9e21ce46cee4234c422a47b8d85dea18c42f703bcf8ebb63456acb5. 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/BER180930011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e486a3733880cef9885120e9373107c1626b8523956f6f90652e33f6727fe51. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/BER180930012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a760e1717b4c3be54b983080ca97e801e707417b7f869b8c664c1542864454. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/BER180930013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9526c23971ead692bf0efdd17045d73a8a522aaef2b24d1fb52b8caa96d1a9. 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/BER180930014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c0595175d72a95744676324dc1ec2428451012f52f4497cbdbf1b02d20acb8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BER180930015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0023292080b009e6ceeb40694006105354bc33a3c3529f26ee295edfd1146c7a. 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/BER180930016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08db1c6cd795d6122e341df9a3e921ca9c2c85f959c8032bc545c8831fb71105. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BER180930017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0944d79d0ca5b79dc12962ef565159416fd45b593d21ebbc6fc44c7410710d1b. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/BER180930018.
David Pohle: Complete Sonatas & Ballet Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8694cf63051198a3c194d8580a4f68b6872bd3cbab34339972d0548dbc95ae. 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/BER182346015.
Jean-Marie Leclair: A Portrait, Sonatas and Dances
5ème Sonate pour violon et basse continue en la mineur (4ème livre) Op. 9 No. 5: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf22a32a8de93afd191cb578ef619756c9a31d9622d0dcdfac8ee49dbe72a359. 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/CH1262002605.
5ème Sonate pour violon et basse continue en la mineur (4ème livre) Op. 9 No. 5: IV. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab49717c5fc702019596febcf4aa31bccc3ae2d7ae86c1a42ca215589ce86d47. 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/CH1262002606.
3ème sonate pour violon et basse continue en ré majeur (4ème livre) Op. 9 No. 3: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2d399ff5f15bb4ef196f561d3fd6e16bfd14d285aa31e1da5064cd342ce1c2. 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/CH1262002609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed88199e9137f1fbd95fb735a0ab634da325cdbadcec2e7b1a9308309a9b031. 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/CH1262002613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c6e1d280395c979203cab66dfa1d5fcf3ee10d491c14f78ac73907c1566539. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CH1262002618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb580ad80af21643a3dbed0baeeb217fd17ae9cb52d3acf0957ad8aa1b92df962. 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/CH1262002619.
Sinfonia decima settima a quatro violini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035eecd59532a55fd0991f391321a8818f6b6743fbd3df19d4b2de65ff54d1ae. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BER181840401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf572e6b91c2856846fda9e0c68a69de4a7e0f1ff469e576ffa0470666461395c. 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/BER181840404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5de112fb98ef7287cd9d35acfe8006797c0a74edda409d37f77f0f50fff1851. 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/BER181132601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b840ddcfd3bdcaca1627539b33324a9bdf6b8c33de0eee77199e289f793416d. 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/BER181132603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa44b3b863383f0443cc07dfc81bb834d50074c12a0b299435437e4bf640214. 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/BER181132604.
Sonata prima in La Minore: Grave - Allemanda - Corrente - Minué - Canario
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc790f7af3c4f7a1e2673cf523ceaed3d0877f659aca542087857c647eb7f5da. 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/BER181132608.