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 0xe7a2dceaf6873b463bbf8793cb3851fe7cca5ff8dfe1434972e3799ab1a48ceb. 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/ffbee064-07cb-4a16-9638-9586b4a7d2ab.json and https://artists.proofprofile.net/proofs/artist/ffbee064-07cb-4a16-9638-9586b4a7d2ab.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 0xfcd1b660f50f7919e8bb159527ae515ea60b2aa17616cd386a1ac452fa964ae5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFYY2028016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2083d2659f13bb43825a1ea897927c99b6da044229f19feef28a29151c52ce0f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFYY2075141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44773578ea76f33945c8d00ad21f166a25196bfbd6dac09255874d93170965dc. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:52Z), 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/QZFYY2076979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f0a06f237f116a691e72bd6b0fc4e29da8fa000195f9873474912534689a0e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZFYY2073910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4d9c11c27b03c8e9c0d1cfcaa726116951b90b37f061f7069aba9e10fd82b1. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZFYY2076978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b2083700e8fae935eb83e0b8dd5d195eaef219cef9f8927252c45a593e77df. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZFYY2076980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5611680631bc2871aeb1e7ec029b012cfa3e06e9416f694930de87d73d4275c1. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:00Z), 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/QZFYY2075143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeee707941ee6e4f80a20815b4b6a25082d4892debb59f8d8340aa50a0ee5733. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZFYY2076981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ccd3872e35115e5a4e3e3fe7000c4cc4ae1cb95751cda29300124612c69b0a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:59:57Z), 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/QZFYZ2089431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc39a999b9f4a0667f5614290f249bad0a38858408a8c83b2d1a6c35ed848fb5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFYZ2090043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fdb48df12caba7b5f1260a045bb445442544ded5339651cc79cfa68fa1a0af. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZFYZ2089428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaf6b99a1e6c84fade515feae6c3bcff3886b0fc2746177d0f8c466181c4212. 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/QZFYZ2090042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526c7a4784fd101ed39eea1e9e30a882d32bbd2845c5363b26440a840ae05cbe. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZFZ22025286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c016a36b0dcca9ec7874f3755c5e8d4120bb49c5767e7112be79b158aa5da9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFYZ2092301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6de158b3401f898b4991aa430366d3b7013a76199a5da841887362045fd057d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFYZ2089430.