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 0x403799d93fd2acd9eddb53a3e77e9748b941db6f1d4169032daab1e7da35240c. 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/c2f83450-1672-4351-a7a8-61704f53a8d6.json and https://artists.proofprofile.net/proofs/artist/c2f83450-1672-4351-a7a8-61704f53a8d6.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 0x4e6e9cbb7f71b79c05ce3b87d8261d4ac0dbde86efbdbcdf511178e7d69cbd57. 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/QT3F42414902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae93e6c152fad6275d3c75bd32bb76e61423c3d705d85f5b43a6f5441621516d. 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/QZZ7N2416809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1620d932ec2496ef77c9c609b2e2b817f1388d790f1d097eea6490a3ce47006. 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/QZTB82483173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a74607e70ed13d7530a014cc83e309d1cc8ecdf60bc5b55c20cb659f074644a. 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/QZTAU2498510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f3f2ee79f80a92c3bf79e09f17eb39145cca934ff1ce7b10050351ace932bb. 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/QZHN62483561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf51849c9ef888398ad9160a67fd312b983f074185bc8996137617e925ecdc98. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6G2302187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8f4a01586592d5339c51f0f94df83d6132193404eda7311537fb757b1a2f4a. 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/QZTAS2351794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26129cef7f306b895afc4aa7221dec2df3c4ece8628d8ad97ab48f208ebc85ff. 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/QZPLR2322366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2aed77ac89a23ebe5ab9bb03d1977658f01472a997ac0caa48223fb391ccef. 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/QZNWZ2372736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf7cabda3c0bdb10d5fb98883d40b1fb26793949ce4fb827503abc87f065fc7. 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/QZMEM2322436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f319835b8bfbccf10510e99330fb4c1ff993cba7124041a171c6df83e66d58d. 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/QZK6H2379521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392321acf1b36a3c7055b26a9b6942910499440331e314e1d076a77767449187. 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/QZK6M2364463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dadab1e7aeafe638e6e7fec705e11beed297474bdabd7e9be5354af83949e9b. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZK6M2364461.