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 0xdee60a6467c494061aeeb699c1a48c96ee4c198af77158906ca82a15dbf14756. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/576cfb83-1475-4742-b165-c9a1ac5320bc.json and https://artists.proofprofile.net/proofs/artist/576cfb83-1475-4742-b165-c9a1ac5320bc.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 0x2d0bfae1250a97f623313aefaa8b43344d01bfa360c101a5c62fb4acc8968e85. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES82508950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313728e1cecfa00c6e42a664a4de3dbfdafef1d883cbe79c34750d5c92df2f74. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:53Z), 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/QZFZ32503931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33a67f34d056458617720d009f273303e378f42f5a50f26ae4d09e724bba791. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN32584249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cd941ad4fb17ba84c3c13aa48da726b843e9821cb20f37c995ee058f54e9fd. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ7U2492033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f5f8b1883283ccaad0ccd6bf509529969c0fa6425aec2b4db970c5239a5cda. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT3F22476160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b35693a5336017fba2caf0d234657e3121b3903f7588dcb69115b0dc0749be. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:53:00Z), 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/QZHN32584250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dbf4b96e26d3d57fd509717f19c85728964a34862d19046f91143d1e9b5cac. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZDA52519535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ada8e359b0c0240cd6f71a28261342528aa2e987bc27e26b8cdbcf27cd56748. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ7X2473782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9574015578ab6941c9935ac64bb9cfa6b950003b7951c7b4827b94b6bfb5dc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN32584251.