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 0x0ccfa4a86fa643798a217ab8761cb584a6046c035a2e1ddb3651ab9f52930f76. 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/41d047b9-ea86-45ec-8601-30bbcbc9ed08.json and https://artists.proofprofile.net/proofs/artist/41d047b9-ea86-45ec-8601-30bbcbc9ed08.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 0x87937f0520fc4f6e91d26bac21b431273bee717a0d47fd2d542c9f6b80acac57. 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/TCAEG1938299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4a40c7a8e3b6bf4510885cbc40952047f7f0e697675bca97db6113898ecbc7. 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/QZAKB2303125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9972a4a13f56be5272a3f9783652c0eceebc4665edddc2a7d07652628057b4ba. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCAIM2415828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5817884b300204dc0a1fe810bab5b3821783384520fed177876f8d2c9513183b. 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/TCAHH2333520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9dbc526847c439ab9ca1c9aa4d9c0faab218e82795fe8459c008b18566bd4d. 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/TCAGY2346865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153cd22ac3819ff20eec1449d8fd116e1248d90d567a415c1f90782f7d96fd98. 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/TCAGO2236215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937a0e47ea048844cfc2cebbf52711c262354ff5a99a8c85242d8b9ef09fcf9e. 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/TCAGM2231658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4575073dc4a03b6250f7464343edc4669673941315a126aa25d89affd08a3108. 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/TCAGG2288271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a68d4ccae3a07a84955d432a86a284040573661bde2b2e83278e421fcdc6ab8. 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/TCAFP2160278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a2364532504d36f2ea99126ba868aad5c7fef5e05e9b1bcad671b16dbbc622. 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/TCAFP2160549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3babee7e2a9114fa9c0ea2bc1c073a73265a346a419bd685fbb0fee33d1fe329. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DETO42011078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1dc4ed6c1fce5ec154dbbfce87bc7f69ec4ff873e728445eb5d4e21c811ce0. 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/GBLFP2085720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f24022e8865dddfaa741aec337aa2c8ffd215926b7ee70467cf502751e36a9. 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/GBLFP2007486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674d813d3901639db16e859f6f6f4d1f19f24eedc0e94e65bb4c49b9507451dc. 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/TCAEM1999315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f67324609dcb50ce36fd1a259317eaabc7a10a3639d9d8516a6e0d966de148c. 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/TCAEM1915516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d3bccf02d40477ba4bd235eaa2ffae4b848ab71b68690a45d183684ebec8ef. 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/TCAED1965604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ebf36dbd869d3bf39a0c6c3163ae0c0ab380a308a93f5be5ba299b5454e5cd. 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/TCADZ1824467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2b36cae2b805d02d4fe79e1b4471f79afcde91fb07bc8dbcb52964189acfa1. 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/TCAEB1967867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e12a781b346c195cc4a1850ac8f55099f5d77c7371960859ea199578d3e56e7. 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/TCADT1853541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43474d1d65fa3aa43a0c04f2f5854d88285e8938a49625732601d0e3fab2696. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCADS1815096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ed9af5dab0d4b53d8a321349d7880edcf0f06b9e21dd40f072b4500cc7a057. 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/GX7852401003.