Trisomie 21 is a French cold wave group, formed in Denain, in the north of France, near Valenciennes in 1980 by brothers Philippe and Hervé Lomprez."Trisomie 21 Boography". Allmusic. Retrieved 2 Janua
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 0x15344f7d2f8aa4897c2767d173a6c7ed28a148306259d1cead6d2fff32a7f125. 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/4676dcd3-1338-4bd4-a3ce-83f80b0013b8.json and https://artists.proofprofile.net/proofs/artist/4676dcd3-1338-4bd4-a3ce-83f80b0013b8.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 0x47080a639e097b1a65567687ab29f1bf0e96716399ef389b7959447c556de470. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TCAFF2053605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8abe38b56d1121c68e191879dc8869dfb89d4f1da94214bfb0ef01b7ecb7f6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFF2053613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b014d54ca4f26582fab461ddcdb360e70fe6138add92c4b422ecda4174316e4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAFF2054405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcf3a8c9050ea635dee192f9da238576fccf36bd392d8395ad47531017c97b6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFF2054408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640a6c488e2d760dd651161aed45d6ba15155dcca562239286def5f6bd3364a9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAFF2054414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53615ee560d29bde0ebc8d335591c63968146998c1c5d5ea25c09998d2e06b2e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFF2054418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e49b4e5f6c45445d5bdbcf2ed05db4d7f600ca7895c70f7b7719859699d42b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAFF2054422.
Chapter IV - Le Je-Ne-Sais Quoi Et Le Presque Rien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c82ec0b5402a564029bedcefb3f8720488222aa6973b18169d6ee7230ebb90f. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/TCAFF2018434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58810919491554ebaa65994c341df79a35690c023de284db91126ed6c856010b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAFF2018438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf276f9880b61ac6f4a535290b65d981ca170d1c140aa6a52203fcd0e5c88c6c5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAFF2018445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090787a497556b689863eea387300d382be6279aaa7abe2a2671c2e653cb15f3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAFF2018453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac73aecccd57cbad387346334ab502d49136979ea0073d54414a71639c60f3ce. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FRODH0400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8e1203c22ce71cebaaeacd4bbd7fb74a63c0e7b8f23c7e301d5bde92de7853. 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/BEC260710512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb539dfdf566c576ebb2f4b5eaba759e829ba175942197b528491ddd48463ec75. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCAFB2065379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f41f4fccdd12c15dc30c6e981c204f41e533dbe07a0e63e3ab84895b42056d. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/TCAFB2065381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43013d5bcfa81ff26e1fc3a285b50af84e7e37f8e539567ec66ad89e429b777. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FRIDO1710491.