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 0x071b64c909674422fccb9a69dd2b7ed2e0a983e6d74bc81046774fe6eafb1de1. 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/4a9de869-2927-4dc6-a9ce-b82e9e3de41c.json and https://artists.proofprofile.net/proofs/artist/4a9de869-2927-4dc6-a9ce-b82e9e3de41c.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 0xbe0a0f81a6b1d1b80de59061a8b7cb62e8ea2de057e82c383e5b36fe4925d3af. 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/QZTBF2320347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab11617bcf6bb920f6cc47355ee4a9e67d3e8a33fa8bd3fb8c41c62af535abe. 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/QZTBF2320348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b10b006e02b4d9f0700521b99216fd112544bb9191e62a2f8206c9c61907fb. 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/QZTBF2320349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbebb0384d22e7114ac296e693c84823014e2caa01e64bc3997eb8220fbb032. 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/QZTBF2320350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bc198140ec3c1dc023db0d901f48774c44ea10d1f57ccdc644a32691af28c0. 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/QZTB52335650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3eba202ba8a3f4781ae7269d549141d902de3ea806b8f9b73a69e7b9bb0449b. 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/QZTAS2120802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7aa8586fe942201a88a878fc22ed866df9b8a024c1505d5a0a7679e76432bc3. 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/QZTAS2120803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ecd4698a7f8b92bb7a8f0c70b1a4c936b1e223ea6e3a6c1075d58b349f4f39. 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/QZTAS2120804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848951a7dc89e93179845c9ec5d2f4d51a195dfc3c6ae9df024d4628ea4016ca. 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/QZTAS2120805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1709098fdb68de1bebb57c0e06a26f97d89dad2a892d4c36562d973dcc0350f. 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/QZTAS2120806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68d62c6ee471a50ccfe61e16a955002ec0a343d0851dabc906d777bf20000ed. 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/QZTAS2120807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3511a05a98b5fa1a1c658bf8e37b3771ac3f1592202df6a410a475cca36fe927. 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/QZTAS2120808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd8dee1c7af3b81ddf9f29da7f40d2fa9a3d93246feaeacc5c9b6724e1c6806. 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/QZTAS2120809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe33666461b51e6b1ca2a686010d66c7107d9c65c9e174fe03e2d35ed847ab6. 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/QZTAS2120810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b204866d8af99fe4edfbbdcc39ade7eb0fa0dee8af1c29250c0bdb6848c9825. 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/QZRP42139860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef9682ddb20e26dab438a455cf436a7b9a5bc044cec6865ace08612cd3e2b57. 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/QZTAS2120811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0812c8e80ef7826853278579e907c63913d2a2a17c1857bda676f40cef0a9d12. 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/QZTAS2120812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7dfa7d7ac1989357ce75208572d7813efef8d0d76d93b7ad7095a5737971aa. 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/QZTAS2120813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bff3653c9ccdb5e70c593be0e50f0b1d7053d3f5da54d335803cb5a5980510. 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/QZTAS2120814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc83a2b6d5352b43410edee550c9881bedcbbd9adf95d871c6fa5ea270a08f1. 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/QZTAS2120815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd122ba0892e20e3fd54c16ed58ede1643621f36331a427af3a1618bcb3ac8044. 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/QZTAS2120816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dea0385c44eec1bf90ae076f38dc85354295a99847551b7c26beaebff045f43. 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/QZTAS2120817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0045d7ea48e4ea846dda791f2080f96177f73630da8ee054844978f906bffa. 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/QZTAS2120818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b3bc881db51dd91626257f021b85b66f8dd2e640cda31a3e094c2f77a8417b. 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/QZNWV2020271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c977d1c54e23a08db305642f3c0839db3ce6b88dc52ae0fcef076f36aa27d39. 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/QZHNA1950845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb964ffee321d03e614fbd51b1f0fc9aca173f20ddd22a3b4a0deea07f52c5406. 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/QZANL1779577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8e7e145a3dbea3e80ee8b97d764bfac9236160a34561f14ee7743ea320f9aa. 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/QZBRF1871539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704969950e267ef1c6b5e2412f3f2cb06f154275fabbf508feef800b9c9d83bd. 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/QZBRF1871540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acc39882ef2c7c6b4f36cffa8d310050d7fa646cc7cb56933a3491f557ae430. 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/QZBRF1871541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e0d66c94b143bf433cb89e4a091cad1cc5bf6f77ea8548763c7a2c2c7574fa. 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/QZBRF1871542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaff663a582de20e90972491ae0658c35e774749469c798c72d5f7f7e481c0fd. 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/QZBRF1871543.