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 0x8c1b3108156229a3581bdecabff7236ff9b197eb0bcb0b11fa01406e31b08db9. 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/b3bc4164-0933-448d-b041-796cee1f8ec7.json and https://artists.proofprofile.net/proofs/artist/b3bc4164-0933-448d-b041-796cee1f8ec7.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 0x1f63ec88573a1edef959e417ebeb55c06b46c9141169b6cd72bbd582caf44dfd. 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/INM6G2113168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a67c5ac077e1efed4b26d22c11e7d6b405f850baac986544513dcb87b0be508. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:01:26Z), 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/INA801601603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2cde81ded7ca4032db96790c7634a79942777f4dc13eff8811a0a647ca4734. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/INM401104915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b49bef116b0ad8a8cb542646534b20d98c982d116475f27e416796f1a966beb. 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/INM401104916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa053226e4f464c8329756e485b6928751ec4e6c93c868984f23d3b33b72848. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/INM401104917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee125c453e21902582c2cf6134e893e06e8cf1acd9c4eda2e75f9f1d900dca1. 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/INM401104919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23645c698fac29ed43dc34a92a9366664587b8a33c9187abfb66111b19b13070. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/INM401104920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e1c20b5aa18504fed3c10ee33fae948bdd3a3599f521f76f6193e1e9fea4f9. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/INM401104921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb925e0b35a2715dab0fe87b4477b2a743712a4ca0bc3fae00fc1b8b73cd9d785. 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/INM402100162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96cf2aa30270aae24ee3ed417fdb96b718d18076b9ecc33f85fa3a81d4726b2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/INM402100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42428013d6a965c95d7b55efdceb0aeae1844dead904fa3d22c2a6779ae132ab. 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/INM6G2113491.