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 0x7dbd1fd338c7422752affff295835af0af77a0695a640017e9a7725e1b7aa495. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0deabbfd-bc87-455e-b19d-af48046ac7e0.json and https://artists.proofprofile.net/proofs/artist/0deabbfd-bc87-455e-b19d-af48046ac7e0.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 0xfa6aef66539faabba372ccaaa9522d67983392561ea2958b9ba2be6bfdb14abb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:05:07Z), 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/DGA092429738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a6c88242924f38af0018b151e9fe4127fd064b8a1bdfd342dab251469bb701. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DGA0M2497440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b81f2a6a861c9dc53ab878332f09530203efe29c78c9d781c7f0b6fe86d4dee. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DGA0H2466273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae9bfec233d4e6a3f6826b656dc696e38ad5c4bc3d576d2c5bb5b49ec8df416. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/DGA0Q2436103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96fa12389166a3fec8534233b3bd2797b5fbc901f6ccb638e51440e78da21d7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA0R2470378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4e36fe937c3308d7f23f608d7d02e09237e1dd4f0a430a9ee60cc4f8741333. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:49:52Z), 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/DGA0S2413292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c52f66739bc34e55966b3b52de7cb91d2dd2b471a8ab52a38b985e134f3dda. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA0T2445646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a9226dd4843abc236315f9d741079f5b8945102dded9082e146091160864e2. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/FR10S2562331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18459b48ff2c50a6ffd4033662eabe9aea24ee7496d57d287b13adaede63454. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/FR10S2562332.