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 0x20c1ee8866a61d3d60ec6ff132fab0aea9ecfdea0cfa766bdc2703321f3388b9. 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/2c00467a-6299-4a61-9cdc-697439db0803.json and https://artists.proofprofile.net/proofs/artist/2c00467a-6299-4a61-9cdc-697439db0803.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 0x13ce8700fb8c0acf16f3cd4cfbb766388838e6cd05a2b35607fdde178113a551. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZMEP2427126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da3f3ee3a2d688ea241d97575b350460a3cffd06ec519827e45ecd347193cbe. 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/QZNWV2441958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708a7b0ca2e560cdeff4a9df72560b2369088a6597d934f3c72029af041ff215. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWX2491945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984661ef52c348aed4a31f7b6d26d06de35683366d3c74ee7c45248256e0e9aa. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZPLR2422795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f99f0d426c247f1335b08406635b67f0d5e43ea92b5aefe285d6cba43c2e9b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:16:12Z), 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/QZHN92500656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90359fe46c427fd4facc6c27c84a9895a1d413973b7be40f0902f7d37e5517a1. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:21:57Z), 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/QZK6H2541392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625ae7ba34d15d285cf659ee0887e6517be3dde5ebfd9019b986bd0636c0e5e5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6H2541396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f390f0df1126487e4017b6ebf11b3f2c145ae114df22199cb68a6ef7d46cec8. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZNWT2534818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f5b981abdfb39607b48d0a1935a66a5858752b25af49af76fb1d643abf08fd. 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/QZRP42590943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdf364ba89b72cc7b886783dfca5d38aed60a725a47e33d4f235a9fdb3a56ae. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTB72517172.