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 0xa78c4025225d454d6e5cc1e046bacf122b4844e5d4cccc24f805972617546e10. 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/38504d7b-5baf-44d1-af8e-97a9c599774b.json and https://artists.proofprofile.net/proofs/artist/38504d7b-5baf-44d1-af8e-97a9c599774b.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 0x3844b3e88247f669cc30085995b84a9326c4d50b59e023920182f88e03db9f3c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:02:15Z), 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/GBBZV9404970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2e7645208b7f124ad836d9ceb474cb66e69cc913f98cf351cf7cdb26638670. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBVVQ1021057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0804b1c55238b00074d954af7e3fa8d6a0325379b4391b50c780208625382aa1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBVVQ1022246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa945826cb55f3443cde482eb10a20fca59a7fc44ec099d0e0ccdc33dcbd7498f. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USVPR9705927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c124686ea473ed6508f148f61c0f58aabbb09f7fb48f3183af073f415ebb4. 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/USVPR9705930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8544ca6d2fb7338d903f39183f50a82be70014820e10fd8c82df4ee9a0b06b42. 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/USVPR9705931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf702b51fabdfd34f32b65cf432d2d2c5f16a1ed1321bba935587b528db414ebb. 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/USVPR0006517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c8fc5cc90a3bca5090a82971f06ce02c93bbe257188f229ada3d7f2b52fb25. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:01:10Z), 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/USVPR9400537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e59308d5c82da2351554150e55e10896392069972f0e4feb5d2df2aa57e92c. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:44Z), 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/USVPR0107356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc0e2560bd2527e22f88e1698af13c31a130413387ee529eacdf39e639b2a54. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:28:40Z), 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/USVPR0006972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ca9900474d47a4e8a2ed6cf7f73cb5663ebe755f14b411b2093bea460e0c0c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZSTP2500211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad707cca8a3eee7c399f57ae295e5fd0cf828c1109d86b6c4084252467003ea. 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/QZSTP2500212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e20e26fa46997d9c77b79ff99890f2dacb67ff5210f23c7d55e2ea3b288a65. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZSTP2500213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cb371b25a71a63be58fbcdd6a7cb51f7548a87544a4e60ccd6b3dcf80787dc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZSTP2500214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cea4e11b042e51c4ed7606a3372ed28309d848a484ec6796d716497ad1ff37e. 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/QZSTP2500215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571c9b795b585528594769675dd51eef194d4aa1bf8527f02935d50e0ac20ece. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:40:32Z), 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/QZSTP2500217.