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 0x5e246fde3fb11700a5182096f172e8a0fccee667ce07806965573fc410ff9754. 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/e0793b37-6f37-4a0b-af57-46da48ff2b96.json and https://artists.proofprofile.net/proofs/artist/e0793b37-6f37-4a0b-af57-46da48ff2b96.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 0x459a6582e87226f8ec7fc52e2c271100000e20a60afc969b3c8a6ce0f4cb48ba. 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/BRUM72001098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41834f75c4ca1655bc67468dcad2f5487d543fa7d0ea87534052979a04406b70. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:30:09Z), 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/BRUM72001099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7be7f54fe8fca30c77b840335d7a60a9be179494e2f23c1840c7d3f451ff62d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/BRUM72001100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e16e9dcc268826b54ad10b1ea42c0e7713592bc973b95838a53a28d821981ad. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:04:59Z), 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/BRUM72001101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcee302920f9f7912df7b62733dedec1a6cf3dc2a6fa75d5c923b56f39250bd8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRUM72001105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352687c9f122c76151034630891e549e952bae0bd3585cb73820380fb227199d. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/BRUM72001106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0098fc90757ffd404489e8b34f27211874b0f046734988cd7034fe4ed055571c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BRUM72001097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e676eba772a527a98491af5db0aff05f2ed93aaf467a32f1c070ad36f0b503e. 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/BREMI9700581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a853c5e6a899889341dc338afed42912577dfe0bed3de4c54d495350711ba39. 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/BRPGD9900028.