Charles Tessier (ca. 1550 – after 1604), also known as Carles Tessier, was a French composer and lutenist. The use of the name Carles suggests he was from the southern half of France, although there i
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 0x0cdeceb75121e0bc5c21f1498eac583dbbcf1994d383bce46ae2bade9864a65c. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e2cc39a-6a60-4997-9206-7a27ef5cbcad.json and https://artists.proofprofile.net/proofs/artist/5e2cc39a-6a60-4997-9206-7a27ef5cbcad.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 0x0241208f8ac3c61c5dd4ce6169d5eb03867bfaa1a51ecf2d6bccf35b8ed3d9f9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR50X0510010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea8b9ee75cc364eda1db76801772b7160b9edb1294770f07e3c180f83bc997d. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FR50X0510002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6cab0e8ddc198420b00e6469f94e09a462c4ddef8f26ff5e3f5e9baac49227. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/FR50X0101912.
Chansons turcquesques: Hel vel Aqueur & Tal lissi man
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89c04152552e4a550f58b9814fe26aacd88d1801cd66850d5836298e3e1e619. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/FR50X0510001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89c04152552e4a550f58b9814fe26aacd88d1801cd66850d5836298e3e1e619. 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/FR50X0510001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea8b9ee75cc364eda1db76801772b7160b9edb1294770f07e3c180f83bc997d. 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/FR50X0510002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7694f14f80c88b63c49d970973483fe0f61ee2bdaeb782e98b1d0072272f33. 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/FR50X0510003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2eddb64bc1df9b9d13aa75c80057bd975c0970d418628301605d50059833d3b. 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/FR50X0510004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9125aa8f656e9cd39f49094b3bee29fc5b3d69b1977a0541dc2cb9c9c0a572da. 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/FR50X0510005.
Villanelles italiennes: Madonna di Coucagna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc9717b66e162e9ab5125c4a02f7e5f8e243368689cb418ee27fa95ced8d854. 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/FR50X0510008.
Villanelles italiennes: Vita ti voria dar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a53b4df149cf03be6e0223c6d1159f1b27dfa4a2c1eb53d182383ecac1ad45d. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FR50X0510009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0241208f8ac3c61c5dd4ce6169d5eb03867bfaa1a51ecf2d6bccf35b8ed3d9f9. 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/FR50X0510010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e1e540a8c2c7863ad94a1e4ba256a1c586b568360a0a2d769a4483f9bf887b. 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/FR50X0510013.
Chanson: Je suis par trop longtemps pucelle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6976860d15e840e62f11d967104ce0e3fb4491106d9d4496f0ab23c7c14c168f. 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/FR50X0510014.
Air de court: Que le flambeau du monde quitte l'autre séjour
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86480a8f16e2b9d2a28058d14f4dc9a4742d22d43857305cee0bf39424941bde. 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/FR50X0510015.