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 0x80ed0fd5984e222cfcbdd772e9aed7f8141186825823a0eb7eb1d18431b0e02b. 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/66421df8-03f9-418d-8c1a-f8ab6c092ea7.json and https://artists.proofprofile.net/proofs/artist/66421df8-03f9-418d-8c1a-f8ab6c092ea7.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 0x1677f3737c4674382dd998fd9d969bc6647857c0defe5196e8274df64c9282e4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM7281653247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f01436f028caaaf093a6013012bb96bb1d93e467b778d3e786b973385a71bdd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM7281653249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c041983c502de8f916120bc536ad28a55397bc355fee45af760fad02de9c785. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QM7281653253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45d0382a7c1faee00e438e0d6056c179d649ef2a38acf70fe1590f1fc38d4ca. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM7281653175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc327f9f5c19212473d607748dc687a4b910826053149e32794200b1bb67a6704. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM7281653177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b4a184873cc10c4d609ea816ce33c3741d7df8d2a0f55126f499a1ef25594d. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:11:28Z), 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/QM7281653180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9a3a6e188fc3955dd9dba54e2569fbacf0455c06732a139858177da3c33de5. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QM7281653181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca77e285c286d4704aa53a2f07455fa33ed9041651e287eb277f4df662e4ab4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM7281653279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f484095a10d011708818b15fd538e8ea36c4dfaa06f03889afd747689f046d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM7281653281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc124f694470bd3cff287da7165ffa5c48277ac75b3dc4c6f33922d55effb6fb. 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/QM7281653282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee62c4a1c8ef275b2884a2bebdc3dcd4ed05db1b826ab4c4baeaff850f065347. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM7281653215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4eb7268369ce5e4ccdf09be78ec7cba83a34b7217aa733b610ef6671ba617b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM7281653217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b022ed11af3cfea329945ed51f6bea76adc696e29cf674fd4e1311d0c6fa08. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM7281653219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563ba15187d62f0ca1d28d60f61413cb3b5b53ed453e10fe400ee9cfc9ebca53. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QM7281653220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7562906f50df6e23690d719f9918a6594ed4d9f8d96ea48b8a7712a85c9b4c06. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QM6MZ1725579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39f19f0db6e9341ee896e9de795cf99a6b4b0a5bc796c278f56bd2e9865bd3c. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QM6MZ1725581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6435082d1c23cb6257b3ab865bf558975dbf355a844e98eb2b3cdde5794ddb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6MZ1725583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a184e7a02212027581350f715029f0f2bfd9ecefb6673231d42407a184f989. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6MZ1725584.