Didier Squiban (born 23 September 1959 in Ploudalmézeau (Finistère)) is a French pianist and composer. His musical work is a combination of traditional Breton music, jazz improvisation and classical
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 0xce5d6303655c899774e8901422f5c92cbd1af95d80b65efa8fe9821afc0b24bb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca04163e-2c72-4304-becd-4fe831b01df7.json and https://artists.proofprofile.net/proofs/artist/ca04163e-2c72-4304-becd-4fe831b01df7.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752d0e9b6c62c132a862fbb0669316b893328b804b92affcfd5ac61e5ed00d61. 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/FRX612000518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4ee5ef55943f88790e180e235497c2ce6379097f8dfbe79214b5d4234cbea9. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/FRX612000250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b52d52f47a58f758b78c500afedf9109de07e6a95ce486458fdef1bfa6d844. 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/FRX612000251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c134a9db3ded8cb01a80ba3da88303687337c612b61a7ebe59a23464d9acb8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX612000252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d9468aff41e24f242b86654be1c79ad784f45f3ab96c3fbe4dd57734222caf. 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/FRX612000253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636110e074a12f26da205aa4c84f033621500ce442ce8706618d2902dd7fa65a. 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/FRX612000259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a37dfd814643289643b5f784cab958abb3145b4c304d9a4cd3ea658501454f. 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/FRX612000260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba461bc92335bdb02ac2291179025dbd1178f4e051b544d59380209dae5582c. 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/FRX612000776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1655fe3f6c4bdeb9b7824e3145d11ae293bc15ee1b562c49e85dba51d3b20843. 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/FRX611900400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb894a6a9e27dd35f8792e4e2c6c4f452c27d8586ebe3e1a45d34dae1f0b5a0. 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/FRX611900401.
Suite No. 1 "Tri men": Suite d'an dro du pays vannetais
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2011f2f04ace915a22e2a4299a5b2f63d0ca262d355c71024c817a8e3454839. 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/FRX611900402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0b8b9a2a374b9b2800d685e0d3c96485b1df346e9eb4be768a79f5eb4db9f7. 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/FRX611900403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0f70745e3da3cbfb86a355fa85fe9e16c13e265fbe44f5e15975fe8f8b029a. 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/FRX611900404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaa698474e21cc76171b771ce0e1a10a6f869c2103d89a123d926eb3e3a809b. 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/FRX611900405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a84213be4da7a02f884eb65ad0d6ec3cee1b4871be21fcba41d78ed17a6c3ee. 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/FRX611900406.
Suite No. 2 "Ker eon": Suite de gavottes des montagnes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034a86aa085c95f9b33ec29fa3539a539d0146e76d51243408ea493a5e5f17fa. 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/FRX611900407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dfdd47445d1192018e30a2e6450949f4725d11d74590c2e9a54394c85701f7. 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/FRX611900408.
Suite No. 2 "Ker eon": Trugerekat men dous
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebe0ebe98a8879708388d54bdfc87a2066942bfccad45afd5320fbc0ca51c7e. 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/FRX611900409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f966514acc3dbb36a684b131f9ba7948fe554104f24854cc7f4526f06a3246. 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/FRX611900410.
Suite No. 2 "Ker eon": Kerzhadenn - Pedenn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e41879aa058355da3a4ec51b5e43639f6a13cb8efa7c5a4e5674c013f2ead2. 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/FRX611900411.
Suite No. 2 "Ker eon": Variations sur laridés à 6 temps
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef57bb513888d1feff40ed376434e010bc58b0195840773fa5fd39958dacc5d. 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/FRX611900412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fa7c369fc32b6fb3653cc1f4747210b644b981b2140326716dee27537d6902. 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/FRX611900414.
Suite No. 3 "Bannec": Me 'zo ganet e kreiz ar mor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b67db19b4f60b3967cd728bb3d1a5a407c44165a875c003235d1b5be0e461d. 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/FRX611900415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19fa00be54e62835d4c400bd22a7219700524eda5dca7608eaba94b260a9ab9. 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/FRX611900417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674732d18d08c2ea8fe997ed702ac1abfd04e2cfdf192fea10add4ae0832adde. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/FRX612000230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0fb030260fe6449b881da960a524a2258705587dbb04116917e43aac99c7f2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:29:48Z), 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/FRX612000231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f1c57977cafe8aa52967a15b075c9a9e6f85e1d6048c06e3d5afb1716a01a1. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/FRX612000234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63d3f4d82910dc1decc0afb2a93bc28f8976a45a9585aaf670325845ebe4c17. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRX612000247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4508ff74bc0cdd09eef69ef600825901c8463c4fc0815cbdeecd083e271fb5. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:58:00Z), 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/FRX612000480.
Concert Piano Solo Au Festival Interceltique De Lorient (1999)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5566ffa1618ef075208e5ecaeb3e475172a994f0cd3edf42bca7efd3409752d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FRX611807280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc9258ae2b56f5f5b7165dd9159a515abcce7d0deef71404cc81bb419977e85. 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/FRX612000794.
Didier Squiban: Suite No. 1, "Tri men" (Arr. for accordion by Viviane Chassot)
Didier Squiban: Suite No. 2 (Arr. for accordion by Viviane Chassot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1655fe3f6c4bdeb9b7824e3145d11ae293bc15ee1b562c49e85dba51d3b20843. 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/FRX611900400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be1bd662f528f66f3ec2390e3fc104aac23e0f507ce8ddaef7593add74a3fe8. 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/FRX612200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe793dc966e65e386744c1f2648f7a2c1aaf7952303a51858dd7a130f3569ee. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:23:11Z), 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/FRX612000804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64bca9ab299c409d7f7d9dd1070fab7606cd05773c7a2c03dfa1a612232bd5a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX612400510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf468e67d7f8ed0b98e7b95c9a5c27ad5d1569873a433f930e8730b0f08cd806c. 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/FRX612200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263d192ebc9d3c27239fd78f7ba5dd9f44654013aab5bbfc5978ab66e9bde677. 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/FRX612200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7518cdb4db9526284b751aab6c58c521ba1bb361604f35c490e54d1bdf6b344e. 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/FRX612200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b518262ed239c86cb3daaab7ee3f362ec70e9dfcd2a76b01bbc25e95e7861c8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX612200009.