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 0xcc4f1b4a90f8a06753c24811125e0ccd418f41bf4c4a867aff10b8e0b6ba0836. 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/2df011cf-9a2d-4aad-81a8-caba726a7fb4.json and https://artists.proofprofile.net/proofs/artist/2df011cf-9a2d-4aad-81a8-caba726a7fb4.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 0x4d151677b07c5f59165034337fd256dc3b0e84c1465b91c8904e837a54ce898b. 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/USA4N1301650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4723ec9ad16b69cbbb8e74e1deccd4413657c2de483598d496067f3876bb875b. 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/USA4N1301654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cfe9c92de02150ccf1b4fee56ab612dbbd57725385ef2545f768394e6b327b. 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/USA4N1301638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038bc3e11d13fa4cf26a774e565457d8792704a6bc87ebae8fe63297cb270d52. 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/USA4N1301645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79447a0c136201216796ebe3f42de1d0f8d04276e24b6b8d2c6399238b7ba92e. 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/USA4N1301608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7483bcf5be55afa6796985b49263fa9dfa6e5d18e6641c5cc92661ca692278. 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/USA4N1301622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa560f90ccef16a79cb157cbce27475848dd2db78a0220ba137b5ac82d9fd66e2. 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/USA4N1301431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ee09f08f397eee3f0734f13f1b61ffc93db3e04ed2ccf6afb92bfe092ac9a2. 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/USA4N1600430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9d862eb6f9642db3197b3f4eb3d5b2b3e48d347f9991ca3d8875e47e2238d9. 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/USA4N1301676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de8b44efda1eac665bd75697bc99630e84201ca6a194c1a7a23182ef1ed9e7d. 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/USA4N1301642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20409d19cc730d6f6bfac093160fcafeb77cb8b82c5d936042cbba122a5cf5b2. 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/USA4N1600433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc59f39b6c8dd4ba4d5320913a7eae3d07b93729bd345f04e2a19e8d7d8154b5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA4N1301826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1a92e626af6d645706f33e1f53f9bc8a6eb8e9fbdf58e4ca7e8b4362909e20. 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/USA4N1301570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21234368a90b931010ac886e4b9b700e5452afe60582a1554cf7c8d830833783. 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/USA4N1300273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac1a8bf74d09c8ed350cd95d7a5640804a9a9e2825bacecdf15c07c376ca8d3. 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/USA4N1301829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04bb35c23ca9cd35ac6f9cadb189d7bf4bf857cd3e32602850127de1e2907d3. 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/USA4N1301574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2851a79819967652313fb1096e7ae16016ca1b6cc06abfdeb35065b333ec1189. 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/USA4N1600237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656b4c0262c7a144e9278db290ad93709c510a8392514bc376b464b6243476b8. 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/USA4N1301907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc554e80335ea7dfe46a1a2a15a1a6fcc3b88064749f6021eb6225cbd8d88d04f. 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/USA4N1600403.