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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629c3f4056178b6d8640a27b51a18da525f82667880932c305a6b526bff14795. 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/6c37c025-2b99-4b47-adf2-e05216700f0e.json and https://artists.proofprofile.net/proofs/artist/6c37c025-2b99-4b47-adf2-e05216700f0e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc50a9eff3bb52f029400df7b4c6b3fd10a5691c8fbdd6bc3ff94bc91ab8ae7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:53:38Z), 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/ES8241454201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4203e9eff02c3db1c713e471cbb55c57ac4b5d2b51cebd1eb147521f7d97cd23. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ES8241454209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba0455a91018681fe96d5222ec1c7d7df15e00b79705d723550f697c9f97983. 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/ES8241729203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79df1f18d637cfcfcbda5c202917c29100f642ad3e61bd48678e0f7d0024a161. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/ES8241729207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeded5bf6217b319a5dbd0bf44673c8306ad939e3d0dbacf27ae08ee9ca0b686. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ES8241729209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a3cf7498252d27f35e81011dc99fa792bcf5a11cd0d774f32f854afd195742. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ES8241920401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6e50df32613a855df26262a7ab4b578a9a109debb2544e8218d17f4470b1ec. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ES8241920407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a32e00ab6043427b7ef8c2a08ba0931d46b085fad72ccfa24d65bd0fee153c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:58:19Z), 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/ES8241920410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33629c7e95138a362c269d5f075b674f01b97af4bc2fc9688677139c841fd59. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES8241920411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe1c0629f1d1846fd7b8ec36a9527bcfadea09518fe0c7ef9a0e78d69375c50. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ES8242026901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349986023e3623449eaeb951ffa39a269e521bfab7c749e1362774239e5811f1. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ES8242240602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d1e8a84d421943fa8bcebd937e2a4787c40adc07dd89965b796d6b761986fd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:39:40Z), 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/ES8242240601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c8bac5f376d22ac505a5b8237681c09fdc926181e1b0074a1ac84d99d7dcb6. 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/ES8242240604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb377fe5df8f0648204dd4e262b50e56beee160ce864b97da308378b30faf0c33. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES8242240605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe844cb0998ffcb76e376ce9d4671c2f8e9405be67e660a83de1324597e8e1fc4. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:27:22Z), 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/ES8242240607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a530658639ecccb5d9b3e75494e42aa06aeaa058ed59888d94658d27c7b548. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES31E2302399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a530658639ecccb5d9b3e75494e42aa06aeaa058ed59888d94658d27c7b548. 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/ES31E2302399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bd1935b478c165863567ab39d2a0f996c0130f98bf697adffedfc3a117fa19. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QMFMF1553298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a809bfbaa4bc418ef162d0214ddb513b9786ce96e9dd8632523d0806e8e125. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/ES71G2151933.
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