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 0xce6adde9152c4a424592f56d57418c1f278bc4740a6610d6084997281b405fbc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06a7903d-bd0f-4d05-af09-9d08abb35a3e.json and https://artists.proofprofile.net/proofs/artist/06a7903d-bd0f-4d05-af09-9d08abb35a3e.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 0x22c60c40e5b21f1aacfc2551fe6ee299d10adb89a5f6bfc86c289663a1f63873. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB52308923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a73007045947a8090025844f8b7e1d68ccf49e68b57ead4918ae553b84c2956. 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/QZTBF2389656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2490e78b1674e462d6a2b1c03ebf429bc22633d8387aea8ec018894b4f764b7. 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/QZTB72424048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02225545c9ec5de27998cd89389ba61c2a2a190c26831d047d20bdf322f844a5. 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/QZWFE2434438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2260335a054e190bc2e7827889917269640ee086dabef1cc19824b01b0e1a4. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:31:26Z), 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/QZDA62518700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef9c4fb5e19c7e4574f2b440ec17185f0a4e0b204f421cef35cec5d7bfe03a7. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZHN52501680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1518e6a9f283e138eae712a845e069ce15d7fa3a0dae42788b8242b372b7ff. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:31:32Z), 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/QZMEM2545894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7fdfe414d98d948b5a810044c1dce5b45f8a36f456a9d071e25db63a33e013. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE62M2238094.