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 0x5bb77aecd180ff7635fe838e20c1cc320e6fbb0c93f67dc301bb10df2f0dbf57. 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/6b43e11d-381b-46ea-aaf4-7b014346764c.json and https://artists.proofprofile.net/proofs/artist/6b43e11d-381b-46ea-aaf4-7b014346764c.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 0xeda0a68157f62925e9c0b83c092560bc62b88f97f0b0a0ad6f724ae642f3db15. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FRZ169601660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7243760697aec615ffce7972567ecceeba5633ef43e4478219ff5360f3d350ec. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FRZ169601670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246f541566c9235b82275c7809055169e0eed21f06f28e0ea79e5627dcf89c6c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FRZ169601680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b6f1a477ab9ea07a9a18bd5e1c202ee36a1cf6557d11f2ff9b724a97ae9f6b. 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/FRZ169601720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49d8897064090207db0a7e52d60ada7ee0e49935550829c8638b133afba350a. 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/FRZ169601730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe0fd4769873f900634ba940a6bae5dd33c9be702af743f54ba318423f8652b. 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/FRZ169601750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60458acd0607df6cba6bd5d262e560661b1c14bf576903b6f5e079fb4c468adf. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/FRZ169601760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b774abe80e57dd1acf897ff67ec367ea931a2504cef5cff80415186ecd69067. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/FR05W2500525.
Anniversaire (feat. Les Ogres De Barback)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbf76107581811eb76f0e30a955cebf23fe12c03cb58c182ee27bd765cae11a. 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/FR05W2500526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c1261d6416296219cfc331c8b5a8765a4f9015b678c3f2f42a532a568d3cc4. 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/FR05W2500527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4078888bb9096d52431e9aca117c427cd38a74877da3cd4f74e6ec4c30acc06. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FR05W2500528.
La révolutionnaire (feat. Les Ogres De Barback, Melissmell & Laurent Kebous)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d9cd530a5e600d617b0ab40271bc7979eca60712e4a58cd3486caa49de320b. 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/FR05W2500529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee34da6a3216c5710e6f21a52c181e9517d7fb5fa85795164585b1809f9d85a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/FR05W2500530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9922b4a2556d33b9ad227e0e604ee888406c4ae4d3f320b2d0a3d2d17a436c60. 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/FR05W2500531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618d83f6d536c7148e36521317cb885f9c7517a6c51f0ebbc8f88999bcf30184. 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/FR05W2500532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704d9f0c644f215cf85497a59256c283f5f9f02d037007bf1d631c923f27feb1. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/FR05W2500533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3f08d8afcd865036c00ebfaff80f1dd432f4d9e02fa8bdc235d7694d40047a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FR05W2500534.
Frères misère (feat. Les Ogres De Barback, Melissmell & Laurent Kebous)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5da26cd59284f624f8f42cbe76cc89d94ffa4bd0018361bff56cf963dcfe3e. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/FR05W2500535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13958ce18e24fb83ebaa369b063e190c247487bef055a3e719c33fefc5c2b6d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR05W2500536.