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 0x8b725324caee28e78d132e53917ffc9ce4563f2f7a8e7fdba835716a8c61a9d8. 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/3d84d4c9-bac2-46f7-ba61-0a17eef1463b.json and https://artists.proofprofile.net/proofs/artist/3d84d4c9-bac2-46f7-ba61-0a17eef1463b.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 0xb3a186e25330757f42378088e2f6d08e7b2a0c709e0d4142fa7004fc968db6a3. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/FR96X2136944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceebd69cd0382099f9dd246d6ba762d3671c0cee1a6ad65e0c37bd4cf27383ce. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR96X2143453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90414f4566846125692fe4216a67825e5b4fa84fe08b4b2bf470526099e1a025. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/FR96X2188572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b3d1f60596078b67b0e695c9645b3b30849512eedaeb45876e7273b40a96ac. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FRX762115251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a857ec3227d3dc99ff6ba1d80b439a176822317888fd072dcd25ec5eb7d144e. 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/FRX762190146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ab22cd9a0eea608119a0d18193806735ee5d8877850b07fed07a9dde5e18ef. 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/FR59R2202020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd74312682748140ab15aff1937317ab5cea7a87ed34ff8e075d000bcf217429. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:45:28Z), 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/FRX282262539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8e8aa9c5156974c55b661d0dcb8af45107c90608b135b9ddf9297b8f5e2123. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/US83Z2307793.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5390ddc02b92961ed66a2210cf96886c4db6c6dbcc1ce7761383230d761286bc. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:40Z), 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/TCAIR2477424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21b416e09f22ad50d1b181d42f8e65a6b2e1bc8e108d6bb23bdcba0708be879. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QT65X2537278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec4d538d69e7f1fec85dd96f7e92b84e57d8eab72b9dd1e50a929abd4b0d027. 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/QT65X2585397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c896a010e92a90977b5c019c5f04dce686f0e52bcaee18b332977fffda0675. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT6622510586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf110939f82cf0a163846e135e2d304f629481dc1aa99d405fb913d3de9514cfd. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:02:44Z), 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/QT6622510058.