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 0xcc5dc0fb255e6d4d4e98f890f092000439b140a1dc94c8b6050f7f66c8815ecc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8741a71-2228-4f55-92d8-174d84045996.json and https://artists.proofprofile.net/proofs/artist/a8741a71-2228-4f55-92d8-174d84045996.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 0x4a3d513e34ede09cad0f42263f815e6cc5ea5f741bc8c5aa0c028939a2e4d198. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZES81896028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eff1ed59a5c2a76ae2bd12367c1fcdb911267b289f098ea39cd2939fd2ecd0. 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/QZK6Q2042393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d984d335a5237c0138d757d586426da1d81b455231f3271679675b502bd0c0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAHQJ1883787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc091a832f61cde6599d5370145da8e48e4b0b861fe13a07b14e1df63f4cd8017. 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/CAHQJ1883802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9626ba723ed5f631f320c67639fb7f810018c7f1f11614abb2ed5f69e0be82e. 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/QZNWX2043363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddab68e9046ed0da6345aa3b67932969c4b07c90be86b9ec49664b519d59de9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:49:29Z), 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/QZK6P2199254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8e61c3177ef22d0f8bf926ce282c70a005f62e2afcb2c59b92552758d280ea. 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/QZK6P2199236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07219f8f57d7c399ab93bbdd525e9129c492ed7c7320ae86f1c023eb54b3f725. 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/QZK6P2199230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec3b07626b877ec9e5f68f73ccd09d7c235c5d7415979a16adbe0827912dbc4. 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/QZK6P1921761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38f75163728e3465d4209bc0531c19883e51073c5afe8364cc30ad59a12d0a4. 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/QZK6P2199255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe024792c7433791b8f0213c6e3453531202f6f685c21738e4222fb6a629b9400. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CACWV1955235.
Now They Notice Us (Chopped Not Slopped)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d13583eec0d9b8093e13f13a36ec97472ff133615c665271f0ae6a7da489d3c. 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/QZSYP2149186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf749d6e1c9b3d4cfd946b684a0b861075fcd56c64834dbc5c4d4f83ca7c30893. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAENV1930599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9a9e97e10b710ff2ff191ef1e17528d59317edc604466fceef90e99add7611. 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/QZFYZ2070831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cee392a7f54b141170ca756eb428b80090d452ceb51dcb4a2f51e2b9e750f37. 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/QZHN31921733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae9d9244670c45e14719581f25a13fc6efc1bd73a0055d2b55da1addfd22d9d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZK6P2199231.
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 0x92a44256c1f8a4dc37c49e485b72c44cd0b64f8cd125f8bbf4a1ac21bbacf534. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZK6P1921757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1e6d53ad4bede3d15265090d6c4a651db79ff00b6cc121aa07e198e92ab74c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZK6P1921760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5662cf0d44d0fed0857d96fa1d352681f42d574478da29bfb7deb123a903b3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZK6P1921759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8b719f6b0d0233efa131548e64221c72f71f551b53818057768b77cd56d6b8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZK6P1921762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc93493ea770a2f2ae925ef47bac31e7780d8e12ee6723e12a25b4d770c5fda. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZ85M1954822.