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 0x5279c333cd99e72f98cf7d4c47d7a80adc5494ae1f0d39a56ea6c262c356a5e1. 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/2aa64c66-eb57-424c-bd79-722fcf5dddf5.json and https://artists.proofprofile.net/proofs/artist/2aa64c66-eb57-424c-bd79-722fcf5dddf5.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 0xbe1f5d90d03a3a392b447b1f6341c6a0fea5bec52c9562715c5338053d572f54. 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/QZES51848991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3e1c643c7d64ddccd7b85173227f9cb0f6609f54b6fb2836e1911d282258d0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES51880984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe926b5c3d408bd450809de5838ea9d80a2c2079dcbe1c5180108eda6f5a3ea5e. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZES61855671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1217a12f6900b6d0780d29839c2d5746b5016fbcf70f86572255d63ca1b614df. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES81880592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f2b530200de41769b124201123b5a3508a560040529ce7743a99451a055977. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA51941368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa41f89967223205c04dbf88b4d23aa210fdcbfe697beaf31d4e5b8e049a9fa5. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFYW1926215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931bf1820e7bdf629a181789a28612b5a6271fb2bf243e18fd6acb112daa91b5. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TCAEP1915985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d62dd4e5cb072286723d3049304a1f32b4b411dcf6d8fa07c9563e5600d2eba. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAFI2017713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3641d4b224b5037d222544f5e7931d3d8136e7dffd703bf9bb2acf736241f5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAFI2017725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb0297c892d536d374164566c6ae72ecc0a0fc947b49ae5d64e00d36d3d2e0c. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZVEM2383206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea6ce094efd83653a6316358ee49df3a83a7416a00e4faa9a6387b97218159c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QT4K52531097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e1fd48f8507809a36d9fe968e6c8b47f85a779161dfeb49e469974a3289935. 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/QT62U2516896.