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 0x9fb0587da496bfa840c999ecda7d16f35d0c410128f5c5ab51a7c2eda22ca513. 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/fc6ffc5d-c739-4c2c-a08f-e1925d05604c.json and https://artists.proofprofile.net/proofs/artist/fc6ffc5d-c739-4c2c-a08f-e1925d05604c.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 0xba1fe4bd3829380066c04cae4fcc2edfa4b9f246c279d3990a5054153fb19f20. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE6TI2394764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd1f151adcd418effdc63229cfdcb1d8e1b01f60abb523239fefdcf0f6a560a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:16Z), 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/SE6TI2355066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3ac8e904228714fcf1086658dbff7812a73892a56af26fc00648932d4ade5e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:27:24Z), 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/SE6XY2317092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d4a11aecc0ae79898c5942857731ed1eddf914d1d6062482db1c83eb647713. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/SE6XW2308147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ba6a472dfd4ecdeed727a9dba6eee4a5646e84bf43037c7215d25fe33beb42. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/USI4R0812010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0880227715ce223da75daece269831dea8dfda809a7a7c18aeec82be3f4be9e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USI4R0812013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6f7e43a025f034c07e380825763c5776744bfcc09f171b3e8e0bb5a2677310. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:26Z), 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/USI4R0812015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94896a5e7519a4f4cff3a96ef02f719c7f63708e39d7a4b0b3bc552a617ffb89. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USI4R0812025.
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