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 0x5e3c3ba5dbeb66e0ca5d013653927fd30fffb528c3627ba959e205cc30f83d92. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9da7c24b-4d9b-4f4d-b38c-f3fd4931c770.json and https://artists.proofprofile.net/proofs/artist/9da7c24b-4d9b-4f4d-b38c-f3fd4931c770.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 0xa35218c2c7915b27a6544e5db9b24f9a19d62435fe139c0d9a423a3894ac42d5. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:47:37Z), 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/QZWFJ2454080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a4919955f28422d0de1bc1436d8c6a5c091ca49e6360038a3d92e39976039d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFQ2460015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf17e0d6e2c8fd9c99f0472c68d787a3af1333c699540e51bd2585013a99fa2. 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/QZWFP2497315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8e075593471e1edb3534402c28832d9f28f86fb7497ab69c537a0d1bbf06a8. 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/QZZ782469140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a7e817736050d0e66a08f0c8e02a458a0ca9960ad0987d7e22a08d23c560b9. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:49:17Z), 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/QZNWT2542126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f153924bed08ece2c61938644e2863c7bf500902a4850cffd8ef868e168adea. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:08:38Z), 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/QZNWT2542127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57634c64d23942c7850e9cc5c5273906dd78d27bbb193de97a9d873a1ed821e9. 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/QZNWT2542128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4df4395617f0ee806be9131a81c86c89de7e49cd1eedd0a08f5a21cc5f22168. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWT2542129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01468bd173d8dc22f47a7599e1f749cb2484ec2b4e45757a678ed9205fd59b98. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWT2542130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda57a4cb4b178b9439424dcaeca397da9ff9cc1d23d2d5c257a372c142e345a2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:34:43Z), 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/QZNWU2547843.