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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 0x371d9be49ef2ac1ba5b76d3f23fd1db8981c61a47d6e793d18e4f1571f779ee4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b0d324c-16e6-47e4-b271-49a9dbc6cf44.json and https://artists.proofprofile.net/proofs/artist/8b0d324c-16e6-47e4-b271-49a9dbc6cf44.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 0xc10b476f0178ab19fcf21e21824708aacbe6764552874e7fb4947fadfc325892. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/JPE271200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855189805c6945a9df9d74fc68bd769b28480f60a9b34a5359decc354cc4cc08. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/JPE271200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba9956aa728d91ae588f5cb3dd9dfa0041aeb17978e9ee60cd690289d21fc51. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/JPVP01323901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53a44d0018353fc2ff4d84379272ad273b87fa8c92601aa13d8c835916d02c8. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/JPVP01323902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076bc5776c9f4fe71413b437472bcfce33dad1d8c106e62e5ce42dbd383d1694. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/JPVP01515101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af510a4046016a59f88d01a4a78e636347f81d75a51132480a1821b36697a09. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/JPVP01604702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a5de927aab4df6d12684798a7a986ef21bf65bfd22cefe70f44caee5f9cc7c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPVP01604703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c056bc4cabe393ee7cb9e26b267c8564896b530cf5ac31062c4720b91067fa. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/JPZ921103764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2493416d08e0887c956f2d8c333599e6b5175733fc68bd416de89c134e2d64de. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPE271300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e50300df12e82900a793346a1524d9595dea72d7883b4aadbe8c78bd831fc6d. 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/JPVP01604701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845af2d0ca902e34f0398c355b5fa73ff47840de157215fcc7f0c864909e830c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/JPVP01327401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37af0cdd2fd62a30c36043b930ba998afaaa436369642fa0802ad53c0941a5c9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPVP01313201.