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 0x1aa75da5a6eca5514815696323192e382e5d602a998f13d753d157fb4d86a696. 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/3eaae6a3-2134-476e-ad4e-45101f0d759b.json and https://artists.proofprofile.net/proofs/artist/3eaae6a3-2134-476e-ad4e-45101f0d759b.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 0x2e5f148f5e0da34febdfb25c679bd5665980498480492c05c0367221243af0d8. 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/SE6A91856409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf1666dbed8a94e2e5c184b7f20b40179107ef5ca6eac5d06dc253ea3d61af5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHZ51936353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806ae0afd03435323101f7622974b5dcc4f837e7c22398ec2fc23d5b812352cb. 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/QZGLM2154392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec3284e6c81d4c36dc2c49607e3d8342dad5a4d23ed024dd662b5cca0a6095e. 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/QZGLM2100298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1079f8d968e20dbd48ddda5713985c6561476fe2711fa29543dcd5a3e44b7598. 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/QZGLM2154393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4dc3b130fc1ed41eb508033c5756c1f37b4d1f71ee7243c621bb874f34a094. 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/QZGLM2154394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ec2d90dbe68ad6bb608cfe3c50347b8b219fea35f28319712a5ca348ee46ec. 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/QZGLM2154395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9a4bc8b8edbab3ee75a31c50d5c031727d0be9097098b32ea4984220a0d248. 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/QZGLM2154396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9507732fefb9d2927a65c16cc12f90f878f162ff9e6fb6cc022e12b262435001. 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/QZGLM2154397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed0c791f79f3ccf9b1e2a28f72b14151056e03075dfb87114b00521f14d140b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2294655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129d5b60cbacdec6d756cbbc17cbbec2075344bb7f2d7fe8accc2d71fae251e7. 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/QZGLM2304356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d0d28b6f232fddc0f7804b26bc9834cc798ebde0657e2e4ed13db8fc8f0c69. 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/QZGLS2381390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0637d353cf53f18f7e3c98e5ea4635c9d42e0d1ac3a63184e4021015eb9edcfc. 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/QZGLS2381391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d5e65fc1d4b9d845722e4b4d603e87f0f832a8b7debca785f5a1d15f1de5c9. 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/QZGLS2381392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35fab767b927f7e0153be725822331e8ce956ab1982228e982c482cd7da9d2a. 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/QZGLS2381393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548364562699cb79bf77c5f98cef2148c8d7ff9a83d3bd643fb02aefae639323. 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/QZGLS2381394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cbe418e9b4982fb885b4612ab91f140d914bd13967ed342736a16d69c0d8b2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZGLS2381395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e141ab42998a4e0a3f785bbd7c8e5ba01b63a06aea999b674f11d5bdd999496. 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/QZ5AB2323278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129d5b60cbacdec6d756cbbc17cbbec2075344bb7f2d7fe8accc2d71fae251e7. 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/QZGLM2304356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d75b944525f6f0d7346cab34b820a1acbd12947912044e2923baf985679d26. 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/QZGLS2381396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbb517522e899482415935a2764d543a561d5250739f9f40a508d2be724a8ec. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZGLS2381397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e3ffdaaf5add17345962352e51b6d75afca20f177ddca797ad4533e2151cc8. 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/QZGLS2381398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1e6bd9c50681cb6dcc80384f994e1fb1b5916291bc73498a1528dbad329d7d. 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/QZGLS2381399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc71bd4ac6167ce8f951c9fa138356db248000af4b85dd43084e459bb6dd45f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZGLS2381400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e87065140713b48432c652d5e0b803b2300a90e9171aa2bbe0a9e5a87d9e20. 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/QZGLS2381401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c09fe9971c0661cec9a578b92b8b53c3a2b9cfb84963ce72459d0a97564a16. 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/QZW9K2340215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f00d916302a455cb60e10521b1ea6c4eddd6477d35401b2a47f64348ca7b4d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5AB2402051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c0b7d3b6f8a0a5dfc6d4044f8903c01283fc322849e38ff268d6d3192483aa. 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/QZHZ52097950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f30f48b9b9d1945a3d3ccb5d198e514e55a02233fa81576336de55b2765e38. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHZ52097935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802930432f17f1b0692125c6c2b3373c55e978ad9d175c53087af2f878a6aa20. 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/QZHZ52097947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5775d80785099cf463d065dff305393744eef4536a2cf01815b58fcc31658479. 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/MXA1L2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5707f6682c84c048b30fbc385ba33550831d4fcbab49be590f98570d753dd25e. 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/QZNJV2016543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3798fc06d2cfc0026781cae289e762b0703ca3328f4ec29aff84eb32d951539. 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/QZNJV2016544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dbe92efee748672e8b4d2be49597d48c53ba6796ca9844cd14c1beca86f39b. 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/QZNJV2016545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc9e0ca253e26ef07deb52949b1d243f79e8eb129f7c0e2b6955660bd14287f. 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/QZNJV2016546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb37023a6b27405b2162fe2fcdc3aee6c3b59674facdf91c06f0cdc2723aa12. 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/QZNJV2016547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dc90bb20de7488e631f10a82f0b54be4f7f8af4c3d3bb32ef6cdde8b448a33. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJV2016548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82540d442566bb4abfa73cfe8c35fa8be8a408c3fec407c62893983f8b09dbd. 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/QZNJV2016549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13584146016c23b2c123f24fc9296e6bf9632c4d694d9a14760461c0c841d5a. 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/QZNJV2016550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a4133c308e1e1dec80a69f6db388db75b7f3e92ae15913bb5322461da90e1a. 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/QZMZ92126514.