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 0xf683d439cf5306d447d8121375613b6d428c0d08650ee0b820d05d9452082cb4. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10d1f960-42d5-404e-968b-1bd72a4b790d.json and https://artists.proofprofile.net/proofs/artist/10d1f960-42d5-404e-968b-1bd72a4b790d.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 0x22a9c7939a2366dd4adef7b28b9d5fb59ab6d11a0e09d1038db592784809bca9. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:04:07Z), 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/QZMHP2373006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973881d8101588fee17aafcf9bd47842ab97c517a9ed784492706baed49aba7e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMHL2344133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d00c98802358249709428d1a3b83edbd51fe99a5ac963d7c54b3dc7c02186e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMHN2337899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde634e88c4332656a10ba0fadcaf611eb1d11a5c4abc0cdabcc1668f75e0a65. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMHN2348763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e29fa8ef7b18a814716f4e83e01470caa61052978ddd94bd4ea6d2fa43a3452. 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/QZMHL2378976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4aff7b8f66802cfd848269aff3301d5ea47e1f14732b23db6fda5dc824cab5. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:37:40Z), 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/QZMHL2305300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56773a97573ad938ac60c2f0cde302e3e3540deb1a316e611b19d0294d73964e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:45:42Z), 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/QZS652301856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5240fc82032abd99b60725cff0e2fcc12d7685eeb3f9f297e63cdbac6fb1b0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMHN2336669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1cb6aca2bf2065e33e3340b77946b9d073cc3973faf348bd8f218dd14d6270. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZS642366297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57ed310c249df131255189f5bdef5c9ad8599439836631a524d1fb6ed9991a6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM42K2356726.