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 0xfcccfe97810d325b8362529e691f38b303f853602020b5630921b2c95a5c4380. 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/27319ba4-0957-46aa-b574-e6dc76bf218b.json and https://artists.proofprofile.net/proofs/artist/27319ba4-0957-46aa-b574-e6dc76bf218b.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 0x2e1278ebdfe412cb55797574341390ee881c8a5c70086537c66df4d10fff6c90. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADM1806143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c4c172e1b5825f8eba2afd9a339066732930f86a1418d69c407d9ea11ff07d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR0040446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa94d67f127c2fea68a3883b64e0fff2463f4139a10a9fbdde6a81b14da9fbab. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWW2129690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d52f3db1130c2e6006caedfea7c196c94e6b62e82be5269de2205e94a4a37eb. 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/QZMEP2009246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026583527a6141c63fcdf72500ee1572f0734b833ffb408d3b0709c210fd7954. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ72094536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3e170c3aa6acdb2e1f619ba9c3d8c3a11caf13e104251523c3d72dd91e0f15. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRD9M1900350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfdbd79a31c7152ecb6d7921f3686a4d41c434c3d398b51aa801384294a0376. 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/FRD9M1900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43836b63fe4654d7ad97bd1de7f792c8d5fc1eb8bf55bc39ef6ca2f54fb0f3ac. 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/QM6P41994124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cade30aa9f383d1fa54756fc38b77223c2cc2543bb2ba765a8194a335058b6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRD9M1900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1fdebdeb31a5b5afddd2ee4b9ca2bfc37e58cac07c42e0bfca9f3511418175. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKPL1818676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a1a185727d975a1ae5dbd3c26db0b2f223d020a382b1b3ade4c31f6ab60670. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6N21943791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acedc7b9dc7f18f0a90001574df780de7933f0824173180e0acc7a084fc93d6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6P41994157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b53c651973414aac48b3ecba64a7752477bcfab9b0a6ecf583e2db42d1260dc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P41946619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43836b63fe4654d7ad97bd1de7f792c8d5fc1eb8bf55bc39ef6ca2f54fb0f3ac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P41994124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e3fe70f35d2a570001329dde4713dccf3cfbd3eabe9feb8fc010cadc1ba665. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM6P41996246.