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 0x1c4f8e53377d638d80cfb8f78c871348f80860e77535bc7299f340b0922ab0c5. 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/9e73385e-1808-4054-bf45-067e1038233c.json and https://artists.proofprofile.net/proofs/artist/9e73385e-1808-4054-bf45-067e1038233c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xbd3c3d3823655523ba3ec85545dd558ed7cdf205c0a3c4d601282453ba835107. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:33:19Z), 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/USCGJ0903865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0daad19c4d53777cdd3d9d0514b739ed69b793ef91c3e2c9cc83cef4a4357c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:10:05Z), 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/USCGJ0903866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf2e68c6eeacfc9be07e3eac9ce8ad1c545e4d9965d2d6aab3aab3ee9431236. 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/USCGJ0903868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ed6735f1bffbd299efd2db241b0ca56db1ff65c0bc82476d41ca6eeb1d36da. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:12:10Z), 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/USCGJ0903869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f87a089fb7cc6d0d65f9152051fea1b83633892730ea9a58c907be3120e9789. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:17:54Z), 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/USCGJ0903870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e86d017d906e6b7a83d8d0115020221eb53248ffec9143267a1d039aadc2cc. 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/USCGJ0903871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02891020d969a19c48c1c2eb98b9f81659b08bcb9c28c981b2a49a637e6e42f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USCGJ0903872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa853ce94ef44951be556a65d882bde13c5e474d937725759e6f554318ea6f32f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USHM21020472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742abc9202349f54f3771429fe3718ce64eb975711bf4b7c0d1a8dd8cb83556c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM21020474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5ade0f5e8e1a273e730d2c957be42666e5c2359b193ec4c1e358fe45e87999. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USHM21020482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a319fafbc02a5d340c73406233bc56c00631b7d1b9d64e3c6b5317b1b3d5808. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:42:19Z), 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/USHM21020485.