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 0xe88ed6471239a3f66547704ee2926b4967c365f1c07eb1aafdba0610f3474e24. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9b9f253-c048-471c-a276-a1f9163d4606.json and https://artists.proofprofile.net/proofs/artist/f9b9f253-c048-471c-a276-a1f9163d4606.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 0xc0c10ff4447d9e80dddb0c8b7648a1baf099cd4abbd0977e687c4859c533d83f. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T09:54:49Z), 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/PLB171101467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf18b0ff6b15f56c21f835ae050b3759fca8450d390f8c6a97bb138c1bac0d53. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:35:20Z), 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/PLB171101458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa365d233344b4d0db77092a970667000c91791433f446573d4b079b6c41e9ec. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:37:14Z), 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/PLB171101461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64e0c2337ce26d5c0a4177599b06f8ec9f2987c772965c9211fb6ea941df838. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PLB171200745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185e600cf73c716ffd343745e84ab9209823e04789aecd562db623dde41677f2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLB171200746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef8605910cef7369f91f5e51b9e1045c9bd447871f8b360e83137f561cd7907. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:52:32Z), 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/PLB171200747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a056ced13c4f7982b507d1077bde23549ede770bd2952ed36399b85f7030711. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PLB171200748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f8af380c76afaa45c6eeb692f0fa427af51ed15abdd659f825d64e5382d718. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PLB171200749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551606f0ed05ebd34c38239f90c13403305a0093671d948dfd8bade3992e7b1c. 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/PLB171101456.