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 0x3cb5e07bef668a4a9f6c7f49396a3fff1659c168912454040709492fa139c65c. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e63d7e33-f102-4109-94ef-15a67afbc9a1.json and https://artists.proofprofile.net/proofs/artist/e63d7e33-f102-4109-94ef-15a67afbc9a1.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 0xcd83639d4ea3615fa68c9c41fb3d0cb48f0a83914df5a4109750ab0af86dbb66. 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/BRDI70800465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91540058864f8b2f816b388a70465cf533a7dfc3cd0dff980470d0a7b508f7b. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/BRDI70700268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123ab5beac77f998cf8a22993e2e965cf81bce8e8a4f4a68cdabafc8ae7ae20b. 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/BRDI71300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd9c6833c426d8e030cb521551b724791761c3100d41ed3975bc53fcd91ef18. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:49:30Z), 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/BRDI71300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408447cb0c4587dd7045552b3ad93b4f64544827088c5fb8bb3212cb742108eb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BRDI71300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff80211cebdb06d654f12a7b2a28a2485cde2dafcb56e5e887256341bf81269. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:01:43Z), 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/BRDI71300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4baff87025a66c0471d9f9b3d9fb1d33a041c106ff355776c28e7ffb8acfc6. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/BRDI71300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78600514c4b52e30cab054d9697571fc8c755641aeada4bd73ce4b7e8d40abc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:23Z), 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/BR03D1600205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0eb03447c18f514cddcb5f600ed84200502041998193f6a13eaceef2a0ca8b. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:46:34Z), 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/BR03D1600217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9b49d7adda41516188d0b8411161844525a34f8a9a2954b0989f0ed7cfdf9e. 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/BR03D1600220.