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 0x31c47f36c40da8070606b02a63eae4530e64850ba978109f58b4bca09bfcddec. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be9d7408-a063-419d-a83a-9d067e1c02c4.json and https://artists.proofprofile.net/proofs/artist/be9d7408-a063-419d-a83a-9d067e1c02c4.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 0x43eca89a315f751eb587b58c3aa5b7e88c5cb09fd5508e96d0b38a8d0ea9791f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZN882350011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5445f9b9c2edd3dacee88ed5c9a14d052411212072d0e172cf3f7e7ecd1a8c58. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZN882245429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe758076525231e6279e20041cc065aca45108c92b381546acd8bf7f297b7be45. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZN882226352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae63ee59aeecc68a5be9b28c402971f04b095e795a8487d4410ce2a24e515736. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZN882178928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d001d6121059e81cc76bae1b2321418329dcea246ebd1730648ace2a9e4e893. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZN882178931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc5b9bc93d2846cc70af8f4c5f94784831622bec83abb21a459d073b437ffbc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZN882178932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9a91e9176cdf8cd0f27470339015aeba1b2d4a686b0a52ce3f5742012c1aa4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ESA011783647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11f196b93c2c52bcdf92ae496227d5acb438bb78e7b1acbbdd201dcfc0c7107. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2054766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2454b8b0cdb60851ab0bfd26f1fe05bab76bd76e691cd87fe4b17bb80160fa5b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G2048290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4054f59dcce65cba40d6d4473cfde1093dd75fdb9732320183d09a3b5600c9. 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/ES71G2011166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2aca25c29c05eaf13449da98033afab4750885530143e737f256acedf2e1123. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G1952120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aedf69f618d842bcb4b9be1b21bec56235b5c6201ff9d5a818348d42611cfac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G1941105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66ef8ae4dc7b02cffff79351dde6488ce2cbf711dd23e99a6a5be0c267790de. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G1938536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a3ee2d44fd142a49c0d565b1fafe997420bbf88e2cfdd297f635e11409adf9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ESA011943251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a05870c00846523a071830a7784b1fec9e164f55ebbf38667d84eee62cfc6c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA011927826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde43350536f57da578bb3663cab81f2371b083087900f568ca1b160fec9211a6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2037828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4eab6bb9e32292c45857455efda325319c884eebb1e2dfee84affcbb40e589. 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/ESA011808628.