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 0x26a3481bda2e83be87664a166a3c17e73f354f642aef0db3e2313c0cb7e58799. 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/6256492d-22d4-41fa-a056-b3267b48b00c.json and https://artists.proofprofile.net/proofs/artist/6256492d-22d4-41fa-a056-b3267b48b00c.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 0x76c017bf9618ee08654e4cde00220ef0085aea79b8ecd4e054b1e9eb7f418c64. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:04:32Z), 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/US2Y30631515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063e5ba80230d247eba6703943dc44fd0922200da65ca2cd9a1c23c2b1080a91. 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/US2Y30631435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ecfabf67b7484402aa358120df4dac431b993615c2ae8688af5cbcfadd2ba0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US2Y30631441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5130a547c9cf5b70a8b45a0a301a3feb6f8f6ec35b1ce24227c2e0fca764b43c. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/US2Y30631433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6546b13f5ebcdc23596071f099fc09c3d8d338865212430b32785fde0a1b7d1. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:35:39Z), 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/US2Y30631676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa50b0cfdc67b8747c2dac3b03f21e76bf5fc438d8d565bc91b4922b24b11788. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:38:05Z), 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/US2Y30631684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26015d723e4531daad900cfc027dd6e9912d2759657b8b86b16979cebe5759d. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/US2Y30728013.
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