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 0x5e9be48faa8347c1c6f97c6fe6b91ac2b6033846b820dd35281e6a35dc0aab7c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cf46370-916d-4059-ab6c-cfea6f356287.json and https://artists.proofprofile.net/proofs/artist/7cf46370-916d-4059-ab6c-cfea6f356287.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 0x61482918b24655b3c9d3d98fe854b903b3cf49ca57d1c4fd12dbf88af439d594. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZH5E1961865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f8f358d41348909ce45e3802bffe27d522779510167b8e63ecbafb50a1ba00. 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/QZH5E1961866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8af2f78555949297f2d3d434c1883e133b8c6c8375ccc13885fe4d1963e21f9. 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/QZH5E1961867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf367606424c78a3e8bd04f1043f1e9d8995ea84b56646413f06f1560a7397bd2. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZH5E1961868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8b150a107cbb49ffe8edefdf9a4516e2743dcc2e738f3dd9ccf3428a58bc93. 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/QZH5E1961870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a39b961cbfed2c16744ee74032cb7bd6970a71f15dfc9b76f474e0d2f3960e7. 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/QZH5E1961872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fcbba53bb2a81bfea825d5d6b2c15e5f8ef14bbf7b25a7f17dbeef49329af4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZH5E1961874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d276f78ac40c93d8392a947655d90abb041cf618dd6e1158b24a9108a60844. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/CACWV2593704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1b0f915b881776912d09eb7a4239d164f9afa04cc25129989ecd2dca1eb119. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:28:11Z), 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/CACWV2593705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4cafeab002679fd0dc3afc7484321f1871439d9ecd7cfed2be93d7105e4f60. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/CACWV2593706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fb79cf8d43d8ac1ec559c124248e6a53ac6f34d6ecb873aabbab55eefdc9a7. 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/CACWV2593707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf864609955e9c8b99f3878411a6db5f0e4731b517b40f49ef6290a8d0b1f68b9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CACWV2593710.