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 0x0b2344c0ac58a4e4703d5d1d9ce4c4994cbca7cc873ffd0ee392bb0747cfcc3e. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f469e1d8-0d28-4d06-8c1a-5b19d3635db7.json and https://artists.proofprofile.net/proofs/artist/f469e1d8-0d28-4d06-8c1a-5b19d3635db7.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 0xe9106ea35e6670600210b5f224d5f49e663d826ab84d1a818bbcbcd766590370. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCACN1643698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda03c2dfdb67163e1b31b8b404dbd9eae318d12d56a98b573a67b4f94116112. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCACN1643712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ebbc0db2449075a82ba44c06c9720388524cf11b627997893af6bc46455179. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCACS1660751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb57bf6c672fd117c0f95a77621532ae4fda5ffad42c7a4df52cc1894321d6df. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:11:10Z), 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/USLZJ1757569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb26d7c578d70d16c9d2427523523a889d7b4fc16a2a76b87d51c631f97b55c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USLZJ1757571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63ed02a65ad06c8ba2c3c07feed3fb6df8f164e49266ecf97ef8998e5838f3b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:10Z), 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/USLZJ1757574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5deaf3fa1dc6597f1e736003ab7317ed96918cd2e4e5fc7f834dd57e6b06f2f8. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USLZJ1757575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485fbc8615914144f74d2cf75be4ee1257d1ca2da3bffc92e67df186d545b973. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:46:46Z), 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/USLZJ1757576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540c37d2915b374835f67465e12f6650f887da1dfbc5c55874f3d779adad472d. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USLZJ1757577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4869d68d01dd36196a45abc00cc961717bf9bcc6d9e4b8f6d970b5f9527ced. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USLZJ1757578.
Popurri De Polkas- (Jesse Perez y sus Compadres)