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 0x8cc6238918e97952e2e1e32722bf7889b368b0f1298ac1e6cbcc30498a79c659. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b5a6579-9a49-4a13-af5c-4b0ec0ba6817.json and https://artists.proofprofile.net/proofs/artist/7b5a6579-9a49-4a13-af5c-4b0ec0ba6817.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 0x01ad428b6ac32fdb6aa03807f2c09b1dc2b8d387a9b20d91a1995803b70e905f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMHM2523161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6514b20a309fea3a41d17e76e6841f91c4393b182a9ee7df167b2ba5b3751a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:49:01Z), 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/QZMHM2540802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd56bbe16a2a189cbe5249b36864435a8d80f657fc8c869d26aa0a0b857ebed. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMHP2574740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9357d477c7833e9811a1be8984a715891a7fd376e72db7a6c687d871e069930. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZMHM2507590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3afd4d07eeda51bd6569a4ec499a0ad19addec093a3400f1185bdfd4edde07. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZS642596451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1f7d74df9ea798cef827e749bed9e63c44ad5efb3143346b7985d655cca278. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:32:51Z), 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/QZMHM2589995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce11aef9e29fe87e8d993eb1a2e1539e7089cce15a7dd873814433ef5284e55. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMHL2509015.