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 0x0019aee925caab3f421c13ce5f1b59981c1fa4fed1939feeac6f7cc5eea82a68. 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/f34d67d2-ba53-49c5-8c2b-856fc0fb6249.json and https://artists.proofprofile.net/proofs/artist/f34d67d2-ba53-49c5-8c2b-856fc0fb6249.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 0xb436dae64ddaba0a3c7f529c20f9ea4f64b0d9153ebbbcc11b692a36b4311926. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR10S1869807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c263ceb3cec7e865c4f192b16395bf745b945d140031b50f2a1905898e05aa2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR10S1870134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cfb8fe6be6bb3dae25ef770a558cc33f47485ae032a63269ead03673c05606. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:57:32Z), 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/FR96X1833814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc54e3915ddcccfc3aae658ad96257aa6e474b47ede880863cc68421fbcb5608. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/FRX201855269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd680723232ff81987df1e61ed0e15e00bf2827c86eeac5c1691041d1d0d37e5e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR2X41869573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f5c424bf52195768d8c1ac2f8d9da659063803256809fb36a7ac6435d8375b. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/FRX872016773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40812f02df46570a99ed0a37d58483aa9b8247a42a219198b2ae64b033230290. 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/FR2X42235435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef9a8a46e1875e09ccf963bf1e709a8c67c3763084ced1241b6e40655da890e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FRX202214482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc818f9716ca71bfb85a56151213fcaf4bc1f90aa24d70af9cafd031046579630. 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/FR59R2352046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c615848ad111c69b67fe6d736045c463369ccc2f4e3170f39240b79766ca81. 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/FRX872382055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2872edad8f0d39707fd71c4a336402deec63d849cb374bca42b69a37c0cc168. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA062487694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc00dc3b3031e6f04c132eed84146c8ee6ed3ab724a2eff7cd60d97303d45f4. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DGA0M2407246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbe2c7674ca72ed9d3837ac9613c77f2efa2dcafc01e4b3146de46535885c04. 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/DGA0R2497486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b015d6587a03c32eac921bbc6542b4ce5f35061cfc888d5430e35f09b8f8732. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/FRX452545655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf46bfe86a4b9ec5676b9bc34850b3ce3f4fcaad4284d52a177c283bd3fa5f9. 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/DGA052587634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149a4c419438d537df5ceb0a569108df0c5e059afec2c2c1db9550e2cbf2d955. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DGA062592738.