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 0x1a7203d2e1b297cf4040f22219031cbf442cc9759fd779eb7a9c859ded4c08f1. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2976b36d-e834-4104-8277-9703add8d2ee.json and https://artists.proofprofile.net/proofs/artist/2976b36d-e834-4104-8277-9703add8d2ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Raag Ratnavali: Gurbani Compositions, Vol. 4
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 0xb51aa9cedc2a3e04110bf019576fe90cd19134f874a476cd2419760de422d090. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SE6I32396371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4379c56810c4c3fceb48797c8b5d719c50c40fc6e6fd0e195d396eac1d89d0f. 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/SE6I32396372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f67403186c4d2b5658df4ed5889e7bcd6cf069147663fdfc1b9eef4b366cb9. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/SE6I32396373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d9eac7edaabb2438b3dc5b608e5afd7139b653c17294f04c52bb7f6080050d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/SE6I32396375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97fa0b25537f5dec265dbc3d407a2bab07b488f6119d65fc2578d1c681001a9. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/SE6I32396376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2953ab4b10af2cbd2fb927c3eccc215fd81a0dd7b98eb8a13b8290936e6a2f5c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE6I32396377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe740dfc941672382b6ec258ebffa2b703dddceda5eae018265404f980978f46. 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/SE6I32396378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e83d54c2b7450a9814400c7b7a11b5dac3686527688c6f24a997a264bb6e040. 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/SE6I32396379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7a51ea48738e2e3d0a2dc920d02144512c6493078b24febf61987a820e0b41. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/SE6I32396380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6ff521ad2f861dc40204d8d782df6395671b0719bf8fe2e43d1cb79e3a8dd5. 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/SE6I32396381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1e45560fd76b9ac29a0ceb63b019ce83281a2e58a705b5bc677747c53279f9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE6I32396382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f67a2feb3ffbd86e0f674849b2d9d3ea09e41268d922a256a79a2475b9c791. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/SE5BU2254488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32635c7f24182eec3e3804de807fdc04041965ff525d5bd51296a7ad16d20dc4. 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/SE5BU2254489.