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 0xe4a49227b3fc76c31e1a2ae30b8e02cfaa5432ae343e49d0ffaf16d0eae0cd6e. 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/6fbf7d96-a1cf-4819-a071-f63ef619b65f.json and https://artists.proofprofile.net/proofs/artist/6fbf7d96-a1cf-4819-a071-f63ef619b65f.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 0x0434a231dc2a3f2a8b7dce2ca468ff3c50de83b75fde15e0dc0be371ab453b74. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZHZ62265057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c36a4ca6d3a992a5d9b7abe8a3519efa86bd8e0b213cb7d6466c8c624457607. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZW9K2213332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f51351b177f8b7af6b5f7934e812cc550597c9e3a3fbcdd358c6b7f3d8e870. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/US7VG2318792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b229d92d64f064eebf6ffd790a596e3b58934061e14101f8fdd6209cb2df981. 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/QZ5AB2396850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3951cd0d15a2a88abe0bd1e5dfbfa3034fbbaa966476349ea44c6d0749998f7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:14Z), 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/QZK6N2366622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e84e1509420dd4de9dea755fb03a57f35973a168b89fe971861ea603a5fd3d6. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/ZA56E2305032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041e9f23658f350c341ef68756feb4b54e269fbbeb9c6451301f2f52c7d24e5c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB92379432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5876eac7a90dc78fa057f53f97fef0ce2a0e37351b92079edb3cd385de74046d. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:55:09Z), 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/ZA56E2305673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77d6b281d2e3ec78ece0ba91b8d0bcb482ef5bbc5a441143d173d343f49a9ee. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ZA56E2305771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99abaf56aa5abe8956fef212ad043372565d74443c020ad6bd18b50d0f7b2571. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ZA56E2306036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e1e7364e3063ff04867e9369de80280b82a90522b6c195b46ea55afe29ed8f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ZA56E2421869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49bd0f045ff882ff9735138c22c38e12e542c917492b615ae5bed221f147ddf. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ZA56E2422121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49bd0f045ff882ff9735138c22c38e12e542c917492b615ae5bed221f147ddf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ZA56E2422121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9220151d8910f16f60b10a5ced6098d05125539a98405afd7c8c184f9dc9a5f4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ZA56E2422235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebae9021f5b30c574e105ca7ce8bda212c3548e993333a077da326128ade8ab7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM22496358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986822603d98339a0fa35b887860bbcb49ff74de54aaceac1e8d9ee1151400b8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM22496359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a26fe1ededfd1f38aec1fa45b7da8178842565cee44fd5ce7a5094fa458519. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM22496360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748e30e7db7fb90bc0b0db8ad1f0727b0c52d43b432de58faf15a4658a27ba34. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM22496361.