Zebda (from , , ) is a French band from Toulouse, known for its political activism and its wide variety of musical styles. The group, which was formed in 1985, consisted of seven musicians of diverse
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 0xf18ccf013485b958cc40616409077f71a9d63df82fdea4df2f9563d7a993ef5a. 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/fbb163e3-bdd4-42d9-8bdb-fcdd2d766d6e.json and https://artists.proofprofile.net/proofs/artist/fbb163e3-bdd4-42d9-8bdb-fcdd2d766d6e.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 0x16db190afe8ba49d296ff89c4902416914a36e1ffcb595820cf7ee3689136c97. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:13:26Z), 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/FRZ019201020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0578b992aa67dc722e312ccbe49a2ea43bfa81ee1df5424f5e07beb6157a8f50. 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/FRZ019501130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb325943751c7d3da70543f679cd89adc6a95081be3d3849659089f68652cea3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRZ019501140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8c81e61e76f23001ac52d55643869790feb7c4066db14bcbfeeaf87787e024. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRZ019501200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf704e8958dc0352f4eb1a2a194489e45e3a79f9e135548b19db6624868def44c. 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/FRZ019501260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d641cf9a6f5d130db8bf13744e065c5fd847087379e83987f888b279995219. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:12:06Z), 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/FRZ019800950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88f7377de296ce7228aab8e5b4e7cc7bec490815ce6f7f9b24d00da131148e7. 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/FRZ019801040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408b89db034b49a31aa18e996f682b2533d72e19a1389637b2bd6968d2d12c58. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR16X0280030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0166faf2f96a6164e098a7829c97706ee4e7466e99c4a317cbd441d04ca91ce9. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FR16X0280090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf75f73a77d8172af4abec57491b0e1a7ad6ff600ee6e1d38e5923b3d2973be5. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:05:53Z), 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/FR16X0280040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e91f5c44146cb4bce42def7140cee8a7be8bdc2059b15e385602e2ca8bf07f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FR16X0280050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac297a5a0d90767ba5d56dd500937cc5e862b882ff09765a2a29185f72a954cf. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FR16X0280060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa256181f0986931e0aac5a7a140d5bdddf915825a565d134a2040c39ae8c2cf9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR16X0380150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe678db105bdcd5479bb3f2195db44f0fe61dab3d75c8ee3974fb135f784aa729. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FR16X0380200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac25635a1e17966a0fdb9557f44567099bcfdfb29681439e621db2c037975a5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRUM71102461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb3296341691179aebafca13502fdb0ab75c5ed5176c76f29ed7916ee561ef2. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FRUM71102460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595235cf4948a198110660063deda29fc722efcd6ec1c193420771be241222fe. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRUM71102468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b00952e91ffca6b43b4072f48b1eae9aea8b22a9d46a4b38816f358bee1ae2. 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/FRUM71401205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb676232ae0bb398668455287d354e11a4f8e1657e098a62535d1fd3c7587c48. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FRUM71401406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c636c11f88bb84b65bab9c38735a5c4f99c797efba1e5f1733512f949d96a2. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:44:25Z), 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/FRUM71401407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056a320245116145a58a26d8862a9462c22889d6a3c96520032619b70c3e1468. 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/FRUM71401410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ca63e5ac542d3efe6bcc561d286cbc2537e252621846966e3480204b7693df. 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/FRZ019800930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac25635a1e17966a0fdb9557f44567099bcfdfb29681439e621db2c037975a5. 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/FRUM71102461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5813530a959e9f5edf639659e776c0a18a536aaf5e7730c21c5758534ce9e48. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR16X0280010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28729118dbf8ea9d13ec5de980e1fdb1bf3b437e082e2df1fff784f256bb0a7f. 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/FRZ019501150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c73531d211373b3126c21692c48ffe8b0c634be470a4c7b0dd1f88130af0f24. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:48:08Z), 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/FRZ019801000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88b9ab2ac72393e5c8449d217bc30f122bad5e280b3d02f458b533b64fc7be1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:56:57Z), 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/FRUM71102464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436955d304a11ed76bdbbcaa10d436e42be28e721672e28a3c342f72c777984a. 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/FRZ019801050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2941b22cf21f8f60468dd781cafa23fe69459849d53ab950ee1937304d8a55d. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/FRZ019800980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf3f5033402089a993fe24686ae645d6bc5062c1bf9ef4ac138f26e91affbad. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:19:40Z), 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/FRZ019501250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5e3eb974f35bac5887bc4768427426a6b2549f3fad997fa16fb3dd704667a6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:52:53Z), 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/FRZ019801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55da85493006bbe2e816ad6e1135715c3f92dcd7dadf0e6179e240c7bbc174c2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRZ019801560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004414cbb182b3d78a4f7b186cde23769d8be46dcd424a2aa38b3a4c05ccf26a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FRZ010301200.
Hommage à Jean Ferrat : Des airs de liberté
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1097e2bb110ce015a4b49d0882cab5d6b8ccf7557dbd611b3519a2dfa38ccb. 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/FRZ051500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b5bf3a6bdcffdfb695ec6f6a4fccf0f69acce96f6815a607d4533c1c0a9881. 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/ES5151700348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b18bceb5cabd1c5055acd43a5b988ee846eff7f9eb50f3fddb693a4c593a50. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRZ019800920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b18bceb5cabd1c5055acd43a5b988ee846eff7f9eb50f3fddb693a4c593a50. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRZ019800920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b18bceb5cabd1c5055acd43a5b988ee846eff7f9eb50f3fddb693a4c593a50. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ019800920.
Boris Vian, On N’Est Pas Là Pour Se Faire Engueuler!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990175bf26db0c773d878dbd64c9f3ede8e72449a230971dce230e3f1570370f. 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/FRUM70900784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28729118dbf8ea9d13ec5de980e1fdb1bf3b437e082e2df1fff784f256bb0a7f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ019501150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b18bceb5cabd1c5055acd43a5b988ee846eff7f9eb50f3fddb693a4c593a50. 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/FRZ019800920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b18bceb5cabd1c5055acd43a5b988ee846eff7f9eb50f3fddb693a4c593a50. 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/FRZ019800920.