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 0x9199d4e4fcc226f5562446edc1828c47d4e33c705d23affc395c7229b08cc008. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe318d95-1022-4d99-aada-876937c76112.json and https://artists.proofprofile.net/proofs/artist/fe318d95-1022-4d99-aada-876937c76112.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 0x242ab42323957e049f378f76f39d3631e22196c3aac328efc46cc5f752dbef80. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NL4NL2169766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b79c756a211eeaeaa3bfd7aba5e131297f662c3588eb7ec91c2a17252992e6. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/FRX872443568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ba8593c5e5fb531cf9e16ea1b6eaaf1554d53673c909c233ee6401bb84cc8b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA0T2429891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469ebfb8f7740c023c00503d89444ebfe49b3206014f02f6ae920129b5e35c0b. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/FR2X42560397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7c912b237b73a2ec38a9f9a6e7ba0d40f0caecaae25a235ce661f41133fb8f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR2X42560396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06299bdd0fc2ca928ec7240264c533b2cf264fd17ad4f303daca844364dee5e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR2X42560398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cf1a182e0aa49a8a48adf960f3d3a640b4f4766951697aa4f2d5803a992cc8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR2X42560399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ba8593c5e5fb531cf9e16ea1b6eaaf1554d53673c909c233ee6401bb84cc8b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0T2429891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b79c756a211eeaeaa3bfd7aba5e131297f662c3588eb7ec91c2a17252992e6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX872443568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df838cf479dc3c0bb7e1171d76dc689800a821a4ec901d2365fe4f50369e1e8. 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/FR2X42560400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8129a368ed4819279bd900526f4f20f0156c798ea52edd16ea23d7aad5791e6d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2X42560401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85395418ee919796724953b4184d09bf39d4b314db46b3468931e56889b83070. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR59R2577349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62bb724a694a0f876a90cf18f9db88a8dc8bd3c0cdb00c93f5e9d8e760f2dc3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR2X42560402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c5010cdd18d5e77ea2fc293b04d8aadb67a492149cc2da441af6af8e8fdcaa. 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/FR9W12212363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0802ed371e308eff7085ae93b44f8ced59155cfa75350efc6739333905c1d873. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CH6542215648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c191b0bf30f27e3f644806a003c68f9d58bf0e60fffe6220182f4a490b1bfc. 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/CH6542215649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4059028020267e96574665ab21cd47b478f85d77f014f991eb96aac18c8025d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CH6542215650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b6df3f898c6173d4662956245150be98e18e18acc077f20f4e1a3ead533218. 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/CH6542219929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0724836be5578efeab39d8925f392bbf7363dcb90cebb5ae250792390c5905. 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/CH6542215652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9208477de36b2f89e4f2a4398d24cbe9fc67aa2e562202d915b883924b5aeec2. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CH6542215653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe471b1ec4b992b74b0072a6c9d1d71bc197d3c8d13b82960ff5fe4a02f21a018. 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/CH6542215654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b6df3f898c6173d4662956245150be98e18e18acc077f20f4e1a3ead533218. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CH6542219929.