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 0x3125204f97d75ae77bda8c29a6f34f0f4d742f1dc5c584e605bb19ab054d8223. 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/4e00a1ce-fd2a-4412-a901-7f358ec24a95.json and https://artists.proofprofile.net/proofs/artist/4e00a1ce-fd2a-4412-a901-7f358ec24a95.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 0x3c34a51f5a73d5b64c2eab4d68fc41b795d2236abd9abbc9835968406e47fc7e. 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/QZNWR2288634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87befa649e4cabebf84b6151d192b6221428210feabd25c9363ed339399c757. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:10:19Z), 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/QZK6H2200510.
Baddie Bakery (Sugar Rush! + Sugar Free)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdae31594a6d8cd95d4c1d0db9a4897f4a998d5f89c720a2079723a96887b0c. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:05:51Z), 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/QZW9K2499848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f59618195531614ddde9a8ddaf68c60f05bf11170f2fee600819dcf7a33cc8. 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/QZNJV2520829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31a77bc2e4529e8798ef08b36867222b3b4aa4f165108a328dd018dfbf3fbbd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTVM2460496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92a95ac307a47f81c7e7c6cd0c974bed3775fe6730b368e6be34183d8d78c3c. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:48:30Z), 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/QZGLM2513840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31178d40cd8e9f0a4c523ca0be5d8b516369abf9e68566cd1777a1ed4b93e972. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNJW2587940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f76fed03a6de09ab8de70ab93dddd2f82d24264613fe5f732595fd9f809e19. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USAT22401980.