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 0xc4dca38182e4fd0e59d29d8637dcc2710890f064dd613ae88059abcadfe5f4e3. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa77ddc3-ca77-47c7-ad12-8f25d3f179b5.json and https://artists.proofprofile.net/proofs/artist/aa77ddc3-ca77-47c7-ad12-8f25d3f179b5.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 0xd44455f63d7f7378c9f6ec410a0df0a760d03c35221b16fee109695613a129ea. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/FR10S2124922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20eba2e6a3ca83ddd9d725cac87b656da956d933a2589aef5c7ae45deb3cb23. 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/FR10S2124923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31e1b7ed6828c5b4436410b1a6f533dc8a3681c7bcadd37b23015396a5c170f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR10S2124924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800c582b88fe4272d9b0bba7de27eefd12e36e003aad7acb314011cc4fe5b471. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR10S2124925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785c64ff5235fd904870c5d43daf5a7840514260200e6b140cf02dcee9a1a9f1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:27:21Z), 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/FR10S2124926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c4c89e40bf05500b2410fac24e1f6d456a8f380ecb3e66d899de3a07a1535d. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:35:27Z), 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/FR10S2124927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2418492c62e010bfc574098e7d22143dd54ab092f4ddaea704ce8e1b60a8f8a5. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:52:26Z), 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/FR10S2124929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41885ae93d7a3e28cbd2c9a9fa035bf4776ff540f057fec6bb8c73919ee3b76. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FR10S2124930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35784321726ffb61601026e711f7b032555e7201b31f36556357185cf49e5d4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FR10S2124931.