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 0xd1419f9c89f100b20d3873ab4052dd4adb7314803577cb74b7472430d692640f. 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/cad2f1d6-a2d1-4fed-93cc-b38972e84da2.json and https://artists.proofprofile.net/proofs/artist/cad2f1d6-a2d1-4fed-93cc-b38972e84da2.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 0x8517a2e9d0bb27fcf83ea8a929b246fccab01e6c8b36f6ea175ef13ab10d8d52. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:15:42Z), 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/FRUM70900949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570563b28a0b10f8f25a29bc1d3f19efa0c44887a7198164813bfca322d55b79. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:16:42Z), 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/FRUM70900956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7548343420339d0bf165f5f0be34987b4452c3d3ae79369d135d57f51f8da292. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/FRUM70900952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d320822325a7dcbb8feb54204959d290ede274914d31d33825753403e664848. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:36:48Z), 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/FRUM71102384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeee76ef597972c364b2d2e44f3ba168f733d3fe36cfd1748aa527ea450ef3f9. 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/FRUM71102383.
Mon Homme (Extrait de Mistinguett, Reine Des Années Folles)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19ba67deb2155b696688431f19664303c965c707d281f50aa57bc7315224a14. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FRUM71400976.
Aie confiance (De 'Le livre de la jungle')
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403696d4e1bd18387bdc6e905c5eb6bc709db3d69c206eb3a34f2832eb944eb7. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:19:23Z), 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/FR19X1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2a1e115dff2de8be0f6ed1cb8ad2384878630f95fc0d88d3136efb2f4d2d3c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FR19X1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf3676bb50841450071c1a4ab282eb3c2fab039d0aa176a2ed2f0e624c1a05b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/FR19X1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4baf285c3232e1121ffacb170eddfdddda9563550c832213198118cbc5e5b45. 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/FRUM71402496.
Le p'tit veut faire de la trompette (with Carmen Maria Vega)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5d078efc0eb3ba95f684f48414d7aab160622d91b93a51e8a84928efd978ff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRZ081300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71215c78a5a3753f813d9c6df0a2b6d4ec9f5f16aa528305508effa0ea0bf9d. 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/FR4R61800190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da3ee03ded0bd8e108f77a5e7e6e43ab92b422ca220a35d38b081cefde9fef9. 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/FR4R61800200.
L'incroyable histoire de Gaston et Lucie (Un conte musical)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed398713efe56c154f5f46805f7f55dd33e1c0d2a5e8d09ab36900ad747e02ef. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W11006032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8573fec86ed86d6fa632a8c1e50a2254bd0bb5099b6716e0c96e0c687d23f176. 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/FR9W11006034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf6db155e428eed6852662d6b5a51e826fd61726dbc06096163d6e38eb90cd5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR7Q31700017.
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
Boris Vian, On N’Est Pas Là Pour Se Faire Engueuler!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5029a7abed6d820b47db287109d0bd1b3d6037d32072dd43c8605a1f724d5fd1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRUM70900780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df86661b737888b7b9eaf2fc25a3fa3d8e064a5f4c386634c9a5d208be87f3a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR4R61800180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9026b5420714dfc013a19c9b6f697b05fb32dd45857343ee0f9dfe1e5d6c4f29. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR4R61800290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd618d6401985e4a9d60bea83cbf47a0a8de121f27b8ac0ee2a3ed12a365635a8. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FR2Z21700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf121b7618efe7a71deb34fd02570d1c4df78a2bf1810c7717182c3d30891e84a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR9W11006033.