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 0xfb5662cfbae9264e384db65931bbd1d63267eede2b98986bf3248c2e157c39d6. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b611629a-69de-40dd-a001-b9a2957350f0.json and https://artists.proofprofile.net/proofs/artist/b611629a-69de-40dd-a001-b9a2957350f0.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 0x461f387191fdb69cce6eed9c3f7663f01f3cfe6bfc153b2a2a46ae18eb3a0a60. 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/GBXCJ1600151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca51aa15f854eaee6c4447b791a9215a84e26244e6029e93271fcf1d8dd543b2. 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/GBCYA0700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a9d1adc0dd9143031acdb61e1358a01fa38930890529a7064d5be02c094c95. 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/GBCYA0700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0ab75545b8d24c72cce1dece67100ba8041212aca47243742255a59ae8e0d6. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBCYA0700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863b9a9b84998142b784a66d236a000857c350044b9101ad1326e5983f8e7388. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBCYA0700025.
In Your Night of Dreams and Other Foreboding Pleasures
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a657ce917ebb457d6058ab021578f3f82382f23e9cf8488db25a5706029250. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEET39800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39753e6da4f3d78a410005eb2ea209e5c67970a6cade7a64fdc547a81d23672b. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEET39800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c29d838e11f51120a816b7b72b2ab62525280d142698b6d30cb8654a18e1ad0. 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/UKXWB2300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786494df7234e5d13af8511c35b48e12394f5ad5d9faf578c8c5e513fa910612. 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/UKXWB2300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95cab87453f059259a4580885844038a3ab33a693410c41447563405af8301c. 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/UKXWB2300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4938c965e86a3adfb33c975088d20510c9c2bf5c3a3493ad25ccacf56fd9b50f. 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/UKXWB2300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd5ac01da1dbbc1d2ab75ec902d4ae8d021f63ab5f93ad3428455ef27153c95. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/UKXWB2500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536f1ac601146df14623d0a1680c5ea9014506705f5f51e55bb481f9a3aaddf4. 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/UKXWB2500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd97664b7329a04ead33dc82ba488398b92fcfebfa8f034d330a435109a9a0d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UKXWB2500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435de18c2dd394e82b7a88e1836e7a48511fcf6f6a26f62306e48b5d3f44975c. 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/UKXWB2500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bd87b17328e496b8818b6d4583603d792b75de06505fd8adcf52f95c01eccb. 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/UKXWB2500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307a3235bfdfa23be0e8317c51eb82e8ca288dd10a214ac8e5ca45e1f0c9edf3. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/UKXWB2500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b56a5080bece0ff15e7a7b16b4c0e6d3ab6d0296027373ce97e7ee4d7e2c2eb. 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/UKXWB2500049.
Nothin' Shakin' (But The Leaves On The Trees)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e02d1844a4848618b385845f72c5fb4c07a350d6d8cee4908b0943112143d45. 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/UKXWB2500050.
Sympathetic Sounds of London - Recorded at Toe Rag Studios
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa395ff2444eee9a55f3ffef7e97dd35de80c2ae9ad94d8b254b54fe7300ec90a. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/US2860469514.