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 0x3de2a1cf0532a02fc01bd7390974f640baad08b13d7dca731c0105cbe852765a. 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/411aae08-d42c-49d8-b450-8ee18c4d9d0a.json and https://artists.proofprofile.net/proofs/artist/411aae08-d42c-49d8-b450-8ee18c4d9d0a.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 0xeb892cdcff88fa8ffe637f82ceb67884b11d023379214bfb9ee78b1cd11d892d. 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/BRG6S1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49ee695a8f3a57f39fc8abe9c166482f1cec25009dcdedbc9ffa3748b4953c5. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/BRG6S1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c355700c65df20ef21961e164feaa96d5f778bdd87467c02d4435e4f417f7ed. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/BRG6S1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ab3f80aa7167163c1642c5d2977865242afb41d8875f1ec6f26ca2b4c6e9b6. 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/BRG6S1700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1ed285d9e80d7d98c43e8e3fdb0753718a079c95044e350c9db9ab4bc03ae5. 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/BRG6S1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff592f250824b53dc61a8c8a1e81d5ff27f03fa08970cdbe0b2c4c4ff3efae4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/BRG6S1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e89ac6dec2a17b8c7c4e85070e9244a0e1e9426cd26a6c330fb0fed30bbce8f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/BRG6S1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ee8ba883c3474a6532689230d9bef0df8c911bde75287500b7669e8e29ea7f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BRG6S1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b48e22c7ac54fe06e1c120fb81bc80fccf73d1a33875070eb44cdb1dfc3fac. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/BRG6S1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5a52ee1db6acd94c56a7fb0cbe208895f525cb0e91177e5c93edc1602cb6bc. 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/BRG6S1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf478570557e8e3d9d4eef3e0fae80a9da306144a7b42bc1f29eee694da3168. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/BRG6S1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4e2fdf2f9537a4c205d552c4f715532ee4786bc81f8d493cb5e1b649117646. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRG6S1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154939baf61276d7688c3969c907f4d1fec9cab7b56c24ad249ca1f15a36f160. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/BRG6S1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c3435c61b10286f6c5aee19863f2893d957bdda4552470a24525ce485c480e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRG6S1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dc818ec39b196d57561276335204dccae9e2bec75f6598103c7e67b7b174fc. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BRG6S2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cc00e4d30070c6a57c18b8e8d1b23e92d393ad3ca55540049a7fb5ebe69789. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/BRG6S2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7839eb49d72e9b17d236c47a6c7e8c1235440f62145f5801eaffe676114ba6. 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/BRG6S2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf04e6b90744eb42814b453cfdac79c418af9dad2e0ef826dbee14c212e2a1c1. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/BRG6S2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8ff11a7c4ffd45633456ddeeff539720e9a69ad6e94ffe4b17c3412ec10e11. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BRG6S2400007.