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 0x84e4506e4135aa954950e72645a29620bc15c45b9a37cf7959f059f8915bb619. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90400eb7-293a-4aa4-a0dc-933eb5e3eaa6.json and https://artists.proofprofile.net/proofs/artist/90400eb7-293a-4aa4-a0dc-933eb5e3eaa6.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 0x641b70164a3c8f7813018b15c0b59d4a299cae0dbc7de725e7d538d86853d5b7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:40:56Z), 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/GBSMU9802128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580b170284796ba1f081da24b5be5b31a2e38e3691521e99e17977e13595940f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:41:00Z), 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/GX5MX2195906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7167a582dbfa3dc239cf63c8acd87350e4683b342713cafb0001589ea96d5d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GX5MX2195907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121469bc19f3e59ca88d8746dd35ebb07bc9444cf13f93ee31ba1519b7e5b983. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:11:03Z), 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/GX5MX2195908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf124f3253faa49bc74e38ac498348db480cccaec569a4a6c3700cfa04fba4f1d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7W2512111.