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 0x435a14ef1e9f9e38a61a6dffe3f323d8da4a6e04a3972ed0021ac60f575bcaf7. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86c29470-8425-4e5d-9434-83ecc717e9da.json and https://artists.proofprofile.net/proofs/artist/86c29470-8425-4e5d-9434-83ecc717e9da.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 0x78110914e73cda6fd046fd4d9113d7cef557c36817d1d16ec512b26f1130b107. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PT7GV2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d87816405d49ad609962167395a1556491e18e8a2f40077848426201cf6577. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/PT7GV2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98784ac30adc3a79cd1d3318f85984d52d40aaaae1c36fae0f947e5c0ca55039. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/PT7GV2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2c9db48465eb1c5ebbde7c4e4649ec1da575829118e686b7d86d5848c30beb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PT7GV2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b23dfbae3b0f4fed81673e00c5e61413b023bd28a3bc55691ce279f01ddd66f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PT7GV2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d87816405d49ad609962167395a1556491e18e8a2f40077848426201cf6577. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/PT7GV2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ca0771d406f8a0165cff8faa565ba76d148f3f7285f94ecd05859d8f46c552. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QM4TW2326044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc599a47eeca61b17b30427fc128b5f049f59d1c3be4c13ffd22eeb0116c5a67a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TX2193074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b3be1a60e4e62f0d03e3ae1df754bb87a66449be56e24cf749be31f9eabd5d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TX2193079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d12a12dc096e05555855199c0cc569898a2910a8fd4891a4dfdd8cb5b5b115. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TX2193096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb890b7e67bfc040d820e564743256b91f0296d2c063642620936788bfea7273. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM4TX2193097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6929a0f4858063907f18b6b30bad8c3428384930e6f236a3bac016877533004. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TX2193105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453bf94d204328a19685dd4a779f09542f146432675bb17b0374de8db8f3a1e5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TX2193122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df15dff6c887f5bc90248dd4d714e70c5db67ee773f8e7a4cb594d448f3db97. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM4TX2193136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b898b1013ab458b923af280f37264e50acb3af2f1ebd0b2e2ebd40cb1243bc. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QM4TX2193147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742dab85dbacfabb7bf10d66deaf84d3b1e31c7c42b229ee3d69b215f56c5415. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TX2193149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a93cca0a62ca72c11048d5cdad454c92e2ff512b221520a11c18d95109663f4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX2193150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e38a63ee8902c53262961807e5fbb76b5785374ef68d39770308e37496551f1. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QM4TX2193165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2f978587b2e3296738569a2c820fe2735c48de8fc3a05d04fb5fe48d2c4640. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QM4TX2193167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9f2f35a7c3252bf8ff5b08e3af49e3d42895eb38f097a4f58d4cbb35198b71. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TX2193173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8541cb474bccf8b82ac36c9cae21c3c3dc65c14dc884b58793580b0900da095. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM4TX2193176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9cd3ca1c1127a580059e50f96f78389df68c9e85fa6ab592c7d89af39a1028. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM4TX2193179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329b44404ac6e3e7e0dd7662f341237d1e05914285901318ce2b3108cb2155c6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM4TX2193183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c3b1dfbda725ef02336beca3f78de860093ea5b4bbef90fba1159a4337a053. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM6P42082620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4b2ce402bca9f2e4b11d2fd9c11f410a1c19ed67d0e8feb1bb5fd60f47bd98. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM6P42082631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae031433dc349ab27a22313400b362ae02b99501231c620d97dcfcd361c33cfd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6P42082641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b7cb81eb611463951d062751bc41b5343aa3c9ee6649ee51c8a99d8713f294. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM6P42082654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc950e760a8d7bd5ce568fca582f0c2a79e6053541379b7ee81fc91ca5ccbcb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6P42082707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2194f7478d666b25d58b52f0e3538124b1310858f9ba3cfee4e88c9a7b238ff9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6P42082725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874af9519debed639555aa13ff7fcd868fc1a1026ecce095ac1cd6d84d9385cf. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM6P42082726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb49074de3480034caec70dbbec94e268c25921824b270fd01334d78b5ce46a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6N22016450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12115ffbf882b3c2b4f972a232e8b43e38e2403d066a5cc90da84309c3d18d4e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6N22016479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25bd29878a88a866bce187e9e4619f5aebfc29c4ddaf4524482228c75251892. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA62254200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b2d3a70a6e8274c979e7b7b0cf597052c6fdbc3ffb68b0e9d2b5fd99faa273. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QMDA62254228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51662133d89fd4101e67176f2067819c1adf9351293fb4c6f86accecb106580d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA72130565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9a84e2e002dc9b2abab44122970f9662056541ba8f1f17f49cf5db97247e3c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TW2379774.