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 0xc3a992b8d124a9bcf0c0675ac8c5e7d777056a8bd6860dcd2a7cdfe6463fd5a7. 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/76da9ba2-6d26-4dec-bc9c-252fd853f7c8.json and https://artists.proofprofile.net/proofs/artist/76da9ba2-6d26-4dec-bc9c-252fd853f7c8.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 0x3db6e3e55922a373d9a79eb83b7a9eb03116b9816449c893cedaadd6c4dc94da. 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/USUYG1459712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9f386e3289d863304ce2896b537572f36230af6e8d4d1f843a6e2f9889d798. 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/USUYG1459713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9886510122cccc9f096b6339bd47a996d12cafc99578414278d7c423aa6cb77d. 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/USUYG1459714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49784c84dc2c20596400411f3477d4624ad7ed12b800ab451db3cbaaee076fba. 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/USUYG1453835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5ec4fea1b0f3402d1d964a4220d13fce1be7ef56237f1c04da838d00b65359. 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/USUYG1459716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2551ab092a56f1492fc5a0ffbc7c6b64a74d2fb17c53fc7f44cdda2cb615897c. 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/USUYG1459717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44f208e4c3c0483004494a93ebe2cfc57f1da071fe3bccc5a3c7534400e3892. 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/USUYG1459718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19737affb03f5dc3999cc5ebe5391eb17b5218dccd16c523756a260e8f6c5afc. 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/USUYG1459719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c38499b52cd3a08a0185f5231bb8fe5051ab2061cd02fcb4d925fcbbf995b1. 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/USUYG1460607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392c1080035b90b96866c05a563d35b2c79e50b986476685060907d860142d26. 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/USUYG1460593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15da303e96d846b95bc60ec7b1b492281d5eb6286901548528579c1f3f8fabd9. 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/USUYG1460594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f81f659d1582fdd86c0339525e46590b403cd25de497b3a8f0ec799d8e9b2c. 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/USUYG1460595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeba9766564c683f8262a22c7c8c80fa767f10d33941aeedb71aa37852560132. 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/USUYG1460596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a36250da4d5d24b076ca92b96265eddd98292cd9eb59cd02889fce3336d8200. 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/USUYG1453836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812b6ea3b8ddbea4f6f026a6066d4dc0851bfb2e017b45983aa7faa1cd451e8c. 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/USUYG1460598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aaf7310ee72594a51fec9d265081de493fa980d173573f298b96e5f63c7fe75. 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/USUYG1460599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6c8862939f2d95d4d9e90e94b4a36f4b87c0c92937033c4dd741a777aa129a. 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/USUYG1460600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dca4128671e1561840e1a2f2b3d87126e22668574bfab96830fcd22b036942. 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/USUYG1460601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19183f47b11c2320c5901592308e7ff41c0f2d396be53b9a8ff1e30137d6012. 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/USUYG1460602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8276c9d511591b09e226b41b0b129160f569baa388ea1b5f9c32c528bb5fdf97. 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/USUYG1460603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f040a237018152b4c43da8274625bf833938baf203f08916547afc8e294a5fd. 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/USUYG1460604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9ee09e7e42d592ba43662c6c8f64b03b791fd64e81cf8e19cc63a0836082d1. 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/USUYG1460605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43da980138ac25c2837f94cd4228b349e152e20da5d15e5b3e5f17447ec9d4db. 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/USUYG1460606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf11c68dbc9103e720d546132154563c71d99961cdd06a1870f6d44a85f6410. 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/USQX92306420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79d524712cb902d759e713f802eb3d462d9c337fba338bce67fa0ee97bf3aa4. 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/USQX92306421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94e83922c6f37fe4b568723f6bae93e44ef7c3aec7a692aa0637d8a324d45e8. 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/USQX92306424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acf5bbc3200ef058a11f26d99cb3ad14753ddf5c12ef91c6069ff0774423510. 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/USQX92306425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d05883847e6dfd9fbd0e3478398e8217927e80e138621934d78b7904198eea9. 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/USQX92306426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f8d7015c6e2b8dd51bf8c7784fc26b7f0399b32179ad67466caf564953c90b. 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/USQX92306427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79c699b82942cc6b92399627540b014a6bda7df675e2ad524c08a6ca42d88ce. 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/USQX92306428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0ae27832ef56f92b46a274aeaf7b8b06c2abc924584713103bf574de272c86. 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/USQX92306429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5a5a937c08550db782cace63f2b47ecaf7b0aa6e77190d7163d897b0fda07d. 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/USQX92306430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7b129310086c68641653e86f60b0e772382bd16211e6b46b1cdb3b8bbd8fd9. 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/USQX92306432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664ff80279e5460d21767d8ad6a3fec4e9824eced2b086687afa109587c3b5ff. 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/USQX92306274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4401768f2784ed05ac11d44e85841110fa8a389644d5508ea889085b7501a27. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEN2391236.