Blankass is a French rock group originating from the Indre department, in the former province of Berry. It was formed by brothers and Guillaume Ledoux in 1990. Biography Blankass was formed in 199
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 0x485b5c4f9392bac72ba518f3bbe737d8b4d9278de9e43979a5516cafbe56cbe9. 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/17af2c6e-0fdf-412f-8506-c6c33db52088.json and https://artists.proofprofile.net/proofs/artist/17af2c6e-0fdf-412f-8506-c6c33db52088.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 0x9849ee0286b7067ddb44e8b9329027a113c5bed8c4315ccb18fd64a8e612b662. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/FRZ079800241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa1d8687eec3981929ee31048f61d354925be9351a0d8708e5c77156b1845df. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRZ079800248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c0a7868a38ec0320cc2840de9def0b611c2917eb791a07134e7691345598fb. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/FR33Y0300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf653d97e983936119b27edf488daff1c5d4e0cf2444c77b0f83e997562ead845. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR33Y0300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfd0cf12e133f400d725246e62cc81b2723865ff79d84378f1f3f2cec397f7f. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR33Y0300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56f5f6939ff2a9799647f0cb28a5d9057bf993b9827c9dbc116014ccd6cdbf5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR33Y0300009.
Another Brick in the Wall (avec Spider Stacy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0426652b363e91b803f9d6fbd70c147e2f7c4fa97391d3762c75c34848a1b5c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR33Y0300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9a39cbe66832b08891686cfa540753cc3521dd3baf0f65b7f202e7efa5f2b7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR33Y0500313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74adc29371fc128e564fe9d800c48eedfc6ee04e7379bb875c54a2b10826a6f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR33Y0500314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a43098f023f6bf314ceaff61098d0e30759e3ea5fb9b069c542e0128d38bbc7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR42W0700308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41520ef5723d47c5313ac2eec42a700777a9263f43ce2faece4e49b8dc3b06d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR19X1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8498d2a89f9dda3281d49705e324b2e179c7b8af2c38e9be8ddd3d20ea74a4. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:43:21Z), 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/FR1A91900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b87cfda15bfceac6aec1605e7b9dc77444acde617a548c8ce7737d153ed89a1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FR19X1900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4903a8adcf5aa196d2cb0f8a929f21ae858158889df10f7abaf86707f9f0d98. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:05:34Z), 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/FR19X2000029.
Si possible heureux - en duo avec Gauvain Sers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad00fd72eb976b960ed0d59a88cdc3d9e882028ceed42dbf527072b4bbe13898. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/FR19X2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8c26dc32893dad7579b06ad974fb5e474c9ff8927b1a4387d4e0b4fef0ebc7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR19X2200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a457b37521ca471f6d8d0584d842ee6737d6175a7f43c1308091319bb09ea0c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR19X2200066.