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 0xafc57ddf2a4e5788e9a5dbb9f52c6b1b12ee007365237501dfd18a615714e0ab. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a229339-d78d-4d91-b938-91ddb5503541.json and https://artists.proofprofile.net/proofs/artist/0a229339-d78d-4d91-b938-91ddb5503541.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 0x400b3972ea794ef81a43aed246b51aa7a098b73398af8004642ee1ea0c2ef948. 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/ATEK02012092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08571b4c59120188686db6a7631d89e39a404035bf06a575c31fbb2bae4cdcf. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBSMU9506723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6aa90d9c59057d7c8fe9f2708a99f782aa49148dafefcb275560c703b0081a6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ATEK02199023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c38e90b81314c5b98159c99410c7ac93efe2cb0638f49ccb831414fad136dfa. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMEN2171433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d5e463fbe2c2d3300bde7d6c765c2028e354cca0c2155861535b48ce70ffca. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWX2217269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7783773895cee5d1537b975ad61673dede738a2695d13e481cd74db9e29e09. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWT2156161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef44fcac172fece15c48432f069eda50da2599a07c351c15ef70da3dc742c330. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZNWQ2246895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93a2f7f7a10a2261095f78528fd41dfb1215ecb8cd4c601f0fc50e5b1210fd7. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:10:00Z), 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/QZK6N2390655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883e5442e34bae030b8991e0bdaefda4888ddf0931ef92f5a8f91d2e670acce7. 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/QM6P42387983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbef394a11db45bb977b0fbd6f62b43bab396b2466253451bc4fdd9165c93dd. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-05T11:01:08Z), 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/QMDA62328996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6a681acd8a1e5c9c8f4c09e8f773371e4d9aa88a5bd8a768ec436823f69ac4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:38:21Z), 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/QMFME2317507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb137fe0b7ec8faf2316bd5a7d4aa2ae7a7d98d8c36495d8aaafd67e6a45ad949. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:35:29Z), 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/QM4TX2404160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa497ada7c644365db831dc4b1970ab9808ffd6af2ca7a6011374cb313e25ad56. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAIG2466809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9a03ae955d638ef1f71dda9ef5f7b0f1c785dbdc017275b23c29b93b43aa33. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX38U2127124.