Michel Sardaby (4 September 1935 – 6 December 2023) was a French jazz pianist. Background and career Born in Fort-de-France, Martinique, he moved to Paris, where in March 1967, he was one of the pian
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 0x17959a2c8dcaf592fd9f42e6be3ffae7f222b3e0f4843be83f48d73658b1fb3e. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d6ee0b9-ee4d-4582-8038-d7861edd2311.json and https://artists.proofprofile.net/proofs/artist/9d6ee0b9-ee4d-4582-8038-d7861edd2311.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 0x70f501318063538973157511a43f5f77b19993ab3652b99abec28c73c618ad76. 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/FR6V80006404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9c6567a7dc7cc622181dab2005b350d01c39c689dd353a7a3a18490c0e506a. 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/FR6V80006405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97193351a39a9c68fa957534239570911838707f529b1c6e4eafedcfe37560e3. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FR6V80006406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cbd1aade7fc7de582bd635a075c940dca027e91bdc5ef2c77eed957d83cd15. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FR6V80006407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b5a978048f41a9363ca864ff2add4985aacb7e4e0cfb9d6c4ca837e70cbb11. 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/FR6V80006408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f0746721a30161ec06d90f15ef19e6222a8a2dfb619db727b9239381d3c394. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FR6V80006409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc76ee60a6177c5bb90f64f58323baade2375bb7080e6d5186b48aeca82c4743. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR6V80006410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26148e5af0c7cd1f7390f70576b8ef83be841d80e8ce06b20aa346d7431e9ac. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR6V80006411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dec6bbff0b4e99f508109424a141bf677fda837a128621972fc30889bafc15. 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/FR6V80006412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aad553249aec788b8250b192d632df7167498ff13f453196a6ba28cd47e9863. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FR6V80006413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1df656844e6f21b4f652430990a728430b52074d64e0c6c7960f40b9e24a758. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/FR6V80006414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33acdaa9aafa4e1760c250316b35826914d68117e12eeb63d910277d9403edd5. 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/FR6V80006415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6846b528e783d8056cf0cb4fe98403cf6b9492024df08035977464cf9115b4b. 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/FR6V80006416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbbc9e7242d5077048aedbd293b38108cde3860821d0be77eeeb376606c1550. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRX190802126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475d6f6ca30edec3148909cdc2e1f3aa244fef62058df382d4944c8c2f768dff. 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/FR6F32231380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9980de69ee319ae909cb4e1141c086c0f4a13bdc09c6cb22c507d9445a402a. 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/USTR80800114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47045e9ad4ed97db08a853e240b76a49c09832d8e694ecb63341d779da9f1096. 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/USLNH0505601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eba5c3ffdbb39b763c1cc036ae7bf08460d0aa806c6445d8274d38334a895a4. 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/USTR80300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf04da9b399ae78d99de2bb711f39bac567ef8fbe286257f91fbb3c38e60b56f. 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/GB03A1600172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5ee70a97a187421b45a79d9ae47fb22f01a2bf73a40e470b487453f1a4a238. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEPI81400590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d52dccb9598df1cf52ac1c17c606452dcdbcff83f71688001a785bb6d3febc9. 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/DEPI81400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c7eced1290788ff81cba4f1e241ecab167fea3c532442bb3a6cb039114d9c2. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FR6F32231390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc87f1e8cae411145393ef6f9d366bb6a14aefb751d0c70e8ba1e64c31d38643. 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/ZAC031907197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c089b8d79424d126731ee828a168503e50d5cf301ae3331277684c0c5b50cf. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBHFE0629808.
If Music Presents You Need This!: "World Jazz Grooves" Compiled by Jean-Claude & Victor Kiswell
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1528d2d61e9a502206a1c9fc17f7ed320bacc30605b1066e250ca429f0c16b64. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FRS707288969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16949fa8c242161aa019556f514000368112bea9120f6d799d8062f6b56e2370. 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/GBEQT1800252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b740cee06e34087c93cd0d77390bc09d598b03e05fa19fe79cee75b92e3b4c8. 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/GBEQT1800254.