thumb|Couturier at his concert with Anja Lechner in the Stadtkirche Darmstadt on October 11, 2015 François Couturier (born 2 May 1950 in Fleury-les-Aubrais, Orléans) is a French jazz pianist. Biogra
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 0x6c31bfeaa6c48a7019dd759d8eb942d6fe41b789827016fd94a27ed911867be9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60ed20f5-4a53-4422-9c28-ca6e21261f11.json and https://artists.proofprofile.net/proofs/artist/60ed20f5-4a53-4422-9c28-ca6e21261f11.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 0x3bc18eb2016c9e6114b4d4b46c13c273befd916b786b21cacf135bf17a78cc15. 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/DEB331968201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595ea72652c5f06082c94ca7a42ad24883ab34e340dc165139b46e63ce92ea81. 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/DEB331968202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6d324095d097143fced60fb9f3587d70b9a561ed3c10789c3477374057fa45. 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/DEB331968203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346a03d309a1b0316255f1e4d61b453bda4a7c5dff8f0b75a06db65f5e19f827. 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/DEB331968204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceb3aec3073ce648310e50ae007ebc15126e0cf4d0225dcc0650f95c25d54ef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEB331968205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f1c3cb3d5e2cd8fb4d965befe71da19f4c621b7148bb5e3458908f692a0853. 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/DEB331968206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b98a6cfac4ee8e1fa6f646465345af401a68423645677671606f5f8f3d9079e. 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/DEB331968209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7aa94b1f0119979bbb5f9cd5572ee55d5d9fd984f89c57db2349045004e8b3. 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/DEB331968210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4f59eb1cd62599d458fe36a48e8d93f0616f65e77c404a57fd27aa946795ea. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEB331968211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098a0af45532ef0ea9e332222f19f7747a1bba3515b7e647efe7e22c21fd90f5. 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/DEB331968212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac06b84da6c9942cf155da7a6fd51e0ad9e19155f5ffe2ab7dadcdc6da6c5b2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEB331968213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ec9766887822c7be7e6fb31c486dcceae73394809edf7ef745683284a23868. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:25:45Z), 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/DEB331968214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825c4ab4af91d3ea675246a0f1d8ecf74a533e1104ed7eb51e8757b404633e64. 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/DEB331968215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eeabd00b2c64f1209b04c0a6ec60adc4fe8a579fcef91903c38e6572931fbd8. 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/DEB331968216.
Komitas / Gurdjieff / Mompou: Moderato cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec1519d91efd8091b9ca978793ce712b72a8af39b52733fcc43a0090a5da1f6. 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/DEB331336701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718fa113114c1b86296fc0f0e95cc65fa15d5ca98512d2918ee52ef5bd94ca20. 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/DEB331336702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c49dfa8f762ab1d47ca076cf7be7067c18366ce3b5deb27efee9730e66f5b7c. 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/DEB331336703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64652928a1ea7ffb8b9001c9bcd5d2faca1221cabc0c14a538a0b09b187e4c9. 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/DEB331336704.
Musica callada XXVIII / Impresiones intimas I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f201f96c43c5e3bff858ce25df21846421c3a5ccfde29456f4b2868eb4c96b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEB331336705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a65bc175dfe3c6a1613c66773614b40eb267598402f8e89ebf450b9d45d1f2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:06:42Z), 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/DEB331336706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174273d2ca860d72fe4f445edafb23b844bd4108281ba1b8bc8c7541fc68b3ab. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:47:25Z), 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/DEB331336708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f59a735d8adcb785e50329a346ab6051a2db7c2368408987fb74a0a78d4a9a. 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/DEB331336710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098a0af45532ef0ea9e332222f19f7747a1bba3515b7e647efe7e22c21fd90f5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEB331968212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346a03d309a1b0316255f1e4d61b453bda4a7c5dff8f0b75a06db65f5e19f827. 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/DEB331968204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6737460c2b9c16073bd0b282c92e2de68e12d454cc8d49587b3cb6f6137db4. 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/DEB331652401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3757da25ebe619329b3044d92abea48a40627049b793c7bb8afb5c0f1068b3. 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/DEB331652402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a281a2dca52d4af7dfbfc8004b23e57bce977d005f4b6b85c49331f1610c4c. 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/DEB331652404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe232eb520bb5db350547032f4230f0d9f1f9f5da15b4290edb58fcbe007124dd. 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/DEB331652405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4cc6ff518845aa0a8c003521cb7729c5e86b9dd36e9e9e603b9505dbbef871. 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/DEB331652406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cec186ea7fb392c1a1bf3667a75a98b8375cfb5d49cba20b08e553b754392c. 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/DEB331652409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135f89b9a938769a56bc7b266040fb776a0d82e8cea6d9c69c496b3bf59dda81. 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/DEB331652410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf824aec1df2fac0a094462277d42d03de2e06c847801c8a33173b4cdf8fd8b12. 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/DEB331652411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb337581833a4efc9cd3673d27ec1678bdc15eda213ddb3a6b3abcf9900fb35. 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/DEB331652416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eaf802cfe116e6f17bf95121c126e53725bd340efe4b398ca3e2a32042a05d6. 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/DEB330597903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b9f5852d50cf999f3c5ae932b94379790f600b3f977712d2a8fde243402ce6. 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/DEB330597912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc49f9691e78005f70b377d9c05e8dff3d002a633acab7e60367205a1b40e79f. 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/DEB330915901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59503a01ab1d2a92a33040aba175f3448438d11e4f18656efc6658b995f67a8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:04:50Z), 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/DEB330915902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21023bf8d4d54afe9168fe4d5b96e39d5bdfc56e6c7dfc03f4635494aafeed8c. 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/DEB330915905.
Train Traveller: Berlin-Hamburg, Hamburg-Berlin (1 Hour and 39 Minutes of Musical Pleasure)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c58ed6b1c0cf6500f42ccb8a9f17f9250dc76c1ceb0827f4107f6511bbfc18. 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/DEB332381901.
A Nightingale Sang in Berkeley Square / Les ombres, Pt. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1aeb32250897310d5bc5684a6ebef6be5a5f9f9a14a7ad173e79b2478ef6a9c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:49:03Z), 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/DEB332381903.