thumb|The Sonerien Du at the Festival de Cornouaille in 2012 Sonerien Du is a group of Breton music adapted for the dances in Fest Noz. The group was born in 1972, in Alan Stivell's trail, harpist of
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 0x254b83e09749d7a52de178944af81f7a8a8b3bd369b881d8fc03b23f95065d5f. 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/db7a1893-be41-40fc-bfdd-dd165edb7ab5.json and https://artists.proofprofile.net/proofs/artist/db7a1893-be41-40fc-bfdd-dd165edb7ab5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kanomp ha roulomp atao - "50 ans anniversary" [Remastered]
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 0xc779b16461279312825b7c62e41308444a21bff777417095a6f7bc987ff6aced. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR6V81538742.
Jean-Marie - "50 ans anniversary" [Remastered]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8067022b2d0b0422d08882bd9fedab2ac8bb610a00b2208af013bc00b3491388. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR6V81538746.
Que dit on de l'amour (Le Marcelot) - "50 ans anniversary" [Remastered]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa915bb479bbf976f69c1077b8c47d5edbe08b744f751c6c54e55a5c29eb5425b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FR6V81538749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d608c6e02ae9f2df7af0815c3544500b3ad52dad6b4e449ce0dc18faf3d8397. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR6V80647392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91888751eb21e0edd2d7d6d57972f8c54a46da4f9db1196fd6b478de5f33183d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR6V80654984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0581d3a581c1ad4190d69264475ba5f011fd42e161bb1c1e024c5029d2e27f69. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR6V80466370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895dcddc149bd511f5dc5a9443500694d7f19dac8d2746f300e9036c2ee09b5a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR9W11505863.
Liv'niversaire 40 ans des du Web Edition (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864dfca326a6484e1fbdec38b6a30c1b4a4dc316d70e9cefc24986de1d3c6cda. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR7MT1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb74e515b844d62a7a705a59c6f7259d39e9b25bf614e56e3a652e17dac47d52. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/FR6V81616692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce30c53986658c57034651546fe8d04f0220539a33f8260d00e8b2e80ee87578. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/FR6V81616693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1982c9d37ca7f76c23eb52919146d9149df7a3b578282c14b7af6c5b5af86613. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR6V81616698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36e47115c17e54c5ced3775d71e3d0aee3a562a3b94500ae983f735af9403bc. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/FR6V81561817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65cf86b2d4bb097c1dcdf4d747e763696a3d547007d8e140e72296fddacda09. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/FR6V81561818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebc5a92464b76df9345fc0af5b0c3dd31860d10640fa165c20dd5d6e5726798. 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/NLK530700143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0e7569f429a87305e1ccc982dd47d5860aeec199c873352d619ce08ccc3266. 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/NLK530700144.