thumb|right|Private Snafu was a series of instructional cartoons devised by Frank Capra and produced by Warner Brothers animators such as Chuck Jones for the US Army during World War II.|232x232px thu
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4acf113b6c1896ad2ead9719b257c329de8f029d00dfff98be6925420845b32. 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/be6854a5-945c-480a-80d2-40703e2fdf46.json and https://artists.proofprofile.net/proofs/artist/be6854a5-945c-480a-80d2-40703e2fdf46.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9f9550ce5f584d9ababcbb65d4e08484bb48416bc6130904ab5c2067e66a49. 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/QZK6N2134693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cffa363b0e7805c439d2848710cb905791f14901fe17d600309a87571de54d. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZK6N2134696.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ae34e070f4db9b27530e23e370ae8cedcdb36ffdf6e7f817a3bbe2f1b11049. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHN52244639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba0ab7e32516cf7b766c64c56fae1ae5d0cf915ab0b8ca713905a7ea25a64fb. 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/QZHN52244641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d4250e40ba15c9d0d0fa4a03c46de613d1c74bb1b3eeafe16601820e3cd420. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZHN52244642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e19a52ae789d8ec30be47a3e6f3747e454ad89f7858b712aaada9c1b20462e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHN52244643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcbebd12949e13848d70474e5277236948a580a0aafa35b1daccabd2bac4bf9. 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/QZTB92267812.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046fd06c294f416b0a1e61876eaf6ecfc7fb32b68495c5e74c8f542743f19e8d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZPLS2314572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0f8156b02f3e6db2b908d5ecaabdc5e4df2317dcb8e6743ef85753c9145b53. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTAY2307791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fef7cc5d6b51a1e3266c6de72a05fe09cdcd2f8e1ee4d8416957268751260e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZTB92384447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d7c04cf794d352d56fc44847bbaad8d5218b864e59921a03e8888077f126b5. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZFYZ2437118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c662092694b3be13e1dbca86cea2171ddde49da0495ff5822f8d7b9435211a2. 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/QZHNA2453554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57f2a9a265a50ed503f5314e01efb74677574f56c0fb85213f541b89368d6b3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZFYX2532650.