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 0xed5e95dd291b3838582cdea9cbb209076cefb9716b61fb7e452436203d892450. 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/9fbd74c1-26c7-4c55-b929-0a16c36c17eb.json and https://artists.proofprofile.net/proofs/artist/9fbd74c1-26c7-4c55-b929-0a16c36c17eb.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 0x8608a52e5921f17de0094a8a76fcfa8f84b3ffdea1bc2ad6550dda5cca520362. 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/FR7U61801234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8608a52e5921f17de0094a8a76fcfa8f84b3ffdea1bc2ad6550dda5cca520362. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR7U61801234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df7123a45520ea7feaa329ed7092956b728ec7d6f6a8fbbab1699ee9a7adcf9. 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/FR7U61801198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cb037b5f248dffbfc49f5359d7c63cc7a46adf056f55b8dc5e6c67ab51a086. 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/FR7U61801164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937e49bff0942c4df93076b1a7c867296fb3497e31afd2a816eea301da71fbf0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR7U61801160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114aada8c7c9e632d9e4e3b551d2bf2711130b8325057475ac6ba8323f13b0e5. 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/FR7U61401144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea3b01debc0f0b53d269b51c4038570b38975c6425c74828a2747ef49f73beb. 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/FR7U61801148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4613344ca7c57799ada566e76f7feb055b828b96a9ca853bb683b1930a5886. 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/FR7U61401146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d57af5b432164d30bbaeab1b4891e6bd65788d42a98aa8eab5085bcd01a901. 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/FR7U61401142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde511cbca5a6d67ae713028afda893df32f3ba98436c043bf842ce9f1dfbd0f. 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/FR7U61401140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9f38de2b69cc924e2abd571758abf3f627bac927cd7ab527e529aec7d172f2. 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/FR7U61401136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a35aa92ae27a22db7dd2ac6bea5563af302c1f28009ee8f0c69434e1141414. 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/FRUM71801757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e408505ec42e9ab41cbf84035e2f2da658ee334a8cd41f5eac25de29ad3572. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRUM71801758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73082f31166675900957b54bbe1410a54271bb5e912573e7351c4f333acec784. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRUM71801759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e3666664abb4fdc49a397aab9eb2276c7d854b17a7fc43f761b48c740f856c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRUM71801760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b53a5287251d852eec1da1d2cbfd922dc3e8131266b9148ec250c6e2c2384b3. 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/FRUM71801761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f9e0b7f81dc1534bace4d9474fe876275131dad6168ba326663ddb0ddc1c2e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRUM71801570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3114809039debfb2d378b630f208d4e25ab66f7be21af9f63e0ecf955e1bfd7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRUM71801762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70cae29bae38f1c2732a6937354b78866668151009cd1e47cb6e150b3c9f85b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRUM71801764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef9a630d28bda166c2640fb128505d00d3d1dc327c7047db77f1ea691d76019. 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/FRUM71801765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea87440f3d3239eb60655aaee052cb5cd8b17e3fd0d4ee3ae27df0bbd8cc870. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRUM71801766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c478bff59ea065146ec675333ec3557c34028a31cdcfc6a69feea0ab5e9cbb6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRUM71801767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9d3cc3ca4f2098a525e5fecbacbaf4cd8369cd44216b7cd0d20e13bc864d06. 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/FRUM71801768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28537e2a5af3dc26947955067a026783914228796b2aef16165f88fae5706cf6. 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/FRUM71801769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477d5d5525c69ecc98d2083589b3d107c9d0db37a863614f849ad2e77df5d853. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRUM71802311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e68fed291e2a373727a97f7d0f59cd8c792617b16c2a4114ede070513704be0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRPI81803530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7643fbdd10a7a922f4ed3faa7b757f347fa3228ffc64cb6b8f40c2c5e23036. 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/FRPI81803550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3108d6e693da41617e98f3dd2d8910faa20685f7f7f754846f9a33bd44922d. 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/FRPI81803570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acdfc3498e4b9f40458a519e2c5d407224ec9d294f52568e9f82c4f25db6794. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRPI81803590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e12eea7445be9f2d69ce40c0560f6d46d10980e37295f381839f0c10be4c9d8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRPI81803600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc4ce83ad4eba0b3303c5871ea20a0a4b46caac0effd2a789790da81355a882. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRPI81803620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc36287edf661d5dc499599a3c51e704438b48569912dabe56e9ab530bc8f60. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:49:31Z), 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/FRPI81803630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acb51d9235df12046c10a191c482461db9025879b155f5ff65ce67dc3459b03. 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/FRPI81803640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d5a1dcac0d68dd9aa099b18d0306fb82c89e645b8ac4cf8cacc4acdc249157. 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/FRPI81803650.
Philippins - Extrait de la compile Cercle Fermé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2c7c13710d4c78983e8779dff5b0495338b2df4257e660cf9b7854fe8cf2b3. 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/FR7JC1800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a6c11faf3dce3443819514a1c2f44932857517e1d7aae504194da36e0df3c7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR5R00908379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd156765b545f7b40c0ec0b7f8987cf5b17656cbaf50116b02ad1f16a77a7861f. 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/FR5R00908386.