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 0x65b75f09a0409116ff247157f3cbc6f99845c51c721a485eaa9d1cd042571047. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84e49048-81fb-4139-b3e7-86a9d8dc4e2c.json and https://artists.proofprofile.net/proofs/artist/84e49048-81fb-4139-b3e7-86a9d8dc4e2c.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 0x04f0f9fc1c622cc214b8d5718b712ad6c794f47477043c64b007585e3068f15e. 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/BGA472209998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34d969a9c4b4a6be006298d9223c65efa2f5558d819c853943660c6a34023e6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BGA472202030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0be64374baebd505bed2ea07f9280f37bcd5ed992d3e0d6c1b0daa6f72a0aa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BGA472238670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7c9b2256450740eb53ec7f1749d69b88927826aaf159f2778a6fa2cc266d44. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BGA472238671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9425d68c7d13ea6314944e099b3b5a8ad71482a46494b860d8a26ecbe03fb7f4. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FR96X2325974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da1cfd6282cd1bf95aa044c2d477c118e5b31d8dd30b310eb5161e3de287781. 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/DGA052376799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc794651b0a435d365be59df09e90df89fa4e170af47f279a90366ecada49bb1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DGA052429132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573ed4c8b83adb48202a3ca35ea5a1d20480471bb4604ca49a25bc75e11cd7aa. 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/DGA082473692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0551b0596c155ab8082a207211872a68abcc0934f56a77d1d1c184be5052d61. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA0S2416520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c198a402ad1cba9bc270ae1c6b215d0c8c9889a275cb6646f9fc18040ffefcb. 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/DGA0S2416518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07b65ab99095810f6f5336587a312d8de1a1cbd9955b74ffb2bd39826336396. 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/DGA0T2407066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0aa421587f32ede9851f62b3a4a6012a4e39fe45f495fe57a22921be42e67f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR10S2571225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9234c751707422c5eaa14d16760bc162d5ef6b4e7a5fa91c16f49cbfc90ac766. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QMDA72568930.