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 0x20bc1083ab49c50104dd05f6949788576e00aaa8cc2e48458c84b617a139efdd. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1040128-d321-49ad-bfe2-f30fd2648bc4.json and https://artists.proofprofile.net/proofs/artist/f1040128-d321-49ad-bfe2-f30fd2648bc4.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 0x13493ca963a01bdeb6b13c57eb25ca4b3352a6d7d247ab52450449c91cd8e469. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHNB2193023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91763bad4b32bae45dfbd53eee8bbcfaf3a03906fa1956c04377f942b907baf. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHNC2131768.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5880506be5e153b5d9c1b3986007d83a6c2193c04de7c4e7a7be3cab5dd0b88d. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZTB52265483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df44653a7d309cfc4559a8424f80ea511f51c8fd31ec6a977f5efb10bd40efd. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:39:25Z), 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/QZHN72429639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c7c9ae4fe5a773ecccaac7083618cbf54cbdf06c6da27759cb9b17716ff1a2. 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/QZK6P2431436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d2c7e9d7c5fccf304e62189f4e3e306cba5f7262bad9b159578fa3569ad507. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZNWW2475504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaaa776c4f7cd9451562f1ae633995b455081adba373692258994c1b8020c2c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPLR2463396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd044738a04b64eb1d3ccdf4d94ee85077a7a1e8c1b81025bea44d0334510c05. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZZ7R2456410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8017cbd5cc373a31bb4131628cb37da368239109608386528bf2acb660e0c23. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZRP42502404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844dad71ee3398e59179c56b61de2386ad659d6598675df3c92e08c256d5a191. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFF2563413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5775f34aed4ccd6e6771dedf0cf33381dc2535f7857b6092f81cb69d3e6df6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3EX2555298.