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 0x7825d334660d2d2882a059c1b82cc0aceaee36be9ebaa643b633e39b2d9fb929. 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/c631d5c3-d69a-4188-92f4-4a49d86cf450.json and https://artists.proofprofile.net/proofs/artist/c631d5c3-d69a-4188-92f4-4a49d86cf450.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 0xe30967fa7d1b126c1fd11c4d05a692f1a44e63621e4bab7e1fb96bc062491460. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:59:59Z), 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/TCAGA2231774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c40d8a37786994408025e555f5b30b984072c1bcf3a1b8cbb757d8e08476ec. 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/TCAGF2252526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc782f8345372ed542dba466f2f7bc164a02f7217b74e09f587a09b52b226ee55. 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/QZTAU2251765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb737d83a52454fe4f8619cb187b1dddea12799524a844870addc4991c8323f. 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/QZS7J2379633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb972b4a1d6b0ea790164d44a93f06ec460891e5554e345f6951808487137c59f. 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/QZS7J2375992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d03800f6f3da4fc2ca3ccb982dc78fb2e15fdc427e53698c2e211f31b4ba26a. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:55:23Z), 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/QZTLA2446339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafe392e9f93d45d96ff5ea4806f9d20ef4ecfbda1af750458890d455ade2f90. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:52:35Z), 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/QZTLA2468415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad7be90c880669124a51ca56614b90c8d0b0c548b8f779a3f476f82effc1394. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:06:49Z), 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/QZQAY2455032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925c8aff8f0ab8a7de7460d19e49ca57220f29dcf50383dac1cac3f9c501b327. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZSYP2532980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1460e343216f0612e4f0e9e9f1e2dd00b075e1a4e9cc987fdc0ebc54231b73ff. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:34:44Z), 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/QZSYP2513684.