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 0xf76d2d97084f7d2c9c2ce48de78f81a5b28387357653c05e3c4c039da3745a31. 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/f0a0839e-629f-4e77-9fb4-f838cd25e06f.json and https://artists.proofprofile.net/proofs/artist/f0a0839e-629f-4e77-9fb4-f838cd25e06f.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 0xcccafa164c99ab14c350dc82e1c4ebe51a75c4c1aa51b1d6673e33fe7f49bc12. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ZAC031902700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660061d360b87318d097d5db16a4095fff7c285a097af46fb694ed84a64299f5. 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/USA2P1326722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193c5e84491753795b16c6aa7fde4bc62cfaad4fa517d9e4d2dc4c858b285491. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA2P1392352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471046e5174b3c46eb842f85c7744292376a0e8eafc468c30c2ecd4cc013c498. 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/USA2P1326725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62686dac062ef75ba9aa4829e3bd9d5ecc25f7c6b99f418682a0e0e7b7644c58. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:52:17Z), 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/USA2P1326731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9570860a9481ec5be0f8ac20d5a20461c0c7250b9345cdbde606bc71f5fd440. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2P1392345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7675abc9bd4b7c58d2cad7b3397e30e7e233e099e2a2c2d9b10b12b735a92e9c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:26:54Z), 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/USA2P1392350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8760bbec0ad264d20da8c91d8ff8247777d8e3914ee64c471588a3dcc70d1a29. 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/ZAC031300515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5a5ac06c85b1acec6a2c133f3d8619a93f210ff1968e13bda085c2eb6203fc. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USA2P1326746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4007dad19447f3b87ca6bbacf764dc1b3bbc395f7d218585837e887b58de9478. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USA2P1326720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d78102f9f2c499f06e3cbbf953f69f0ea27047176edae487b657e8fbf29edbd. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:11:04Z), 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/USA2P1392353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb805217cbe711e91f8bba29d1dde3fe401476612400b2acbc009c6223066a9. 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/USA2P1326745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb601bfabfc24e6b05b9f5af547dfec42c88972880b3f52f08d64252c4bbd7ff3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P1392348.