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 0xb4d5081dc72a639c80692b5a8ee7a9696aa1f93d4adbda217258b940f6a5f3a9. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad59d67d-ccb0-4516-b330-d1d1e4bd7594.json and https://artists.proofprofile.net/proofs/artist/ad59d67d-ccb0-4516-b330-d1d1e4bd7594.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 0x1d5fd711215248e244dd0f5b13acd11c9e3e5018955e5d2360f76f1a8dfb0dfb. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZK6L2086518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2cdd5075374da1f46dc193a87a54184e037576867d90d9a550a05be7528f4c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6L2086519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899133da499911a785a07103500d9870c57be94e564800b1c9f96aad6ec5fac9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:10:44Z), 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/QZK6L2086520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70152edf512f5eeae62fb4c759e9f66e376c456bc6439e28df9a47d0aaf1209. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMEQ2002558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264034cd93677425fd776803ae0c2add1f2400ee974f17e5b99a00aecf37357d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZMEQ2002559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f96fca8a33f17a55dca32036308c3c84f97741af1e815d102d3c38ecfc1f4bd. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:03:30Z), 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/QZMEQ2002560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8a016ffa282d9f46f92ad70b40a2790f4a938cda2b490fd1dc27f0be75c55d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZFYX2159095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cf64eb86ce8ac035f6b5149ce4141b6b82267206ad39839d4ec2bb63abab96. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFYX2159096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc5400c72bbaec1e193db435d32f6e86da3ddaed21c67c3d8ee355e04f1eea2. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:02:30Z), 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/QZDA62171570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ea5791d4be270f9c83770c2e40ba36532253aa2768b00541abf35f853f9775. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:03:52Z), 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/QZDA62171571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7243c8877c39c6ee51231150ea42875538d4bafcaeca8af8f3af3054ec11bd4. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:23:16Z), 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/QZMEN2137974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240ea91cca8a40dfa142e86ba682a0f01c65bf3020f5074a5e9822517fe2738c. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZNWV2137881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243694a4ecea199a298ea003250aee874691a71cc84c67fe7190be62cac9e086. 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/QZFZ42269501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83124113c35a35e84a092b75bee6c749ca2513fe833a707e06632a7b125f5fb9. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:25:27Z), 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/QZHN52285001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283c69d8aa399aa2c0f6a050bcb7337096f6bb4317b5a2ef54cb35816f472a36. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:12:32Z), 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/QZK6P2285219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d337ca4b01acff5cae9ef6f287371b540feb8465b4ba91d4ba56950588caefb. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:18Z), 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/QZMEN2270911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a27100fc04bfbfaa054aa6649b161adab7782344dc619d8514a3ec75fba18c5. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZDA52369624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f5ccd8b7f7c81ff0453c50a02406a0ec73f7f49fa0f78fd171ad0d5509bfab. 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/QZHN32387414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d78ec6bd691e565523f55e898d69c7bd50682dcc886996c2f8a39d2914cb98c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6M2345532.