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 0x82672d5533da698d5ba5fcc8c0d26263e24548e0426d873b5de7c739a0ce114e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/041b05cf-a18f-4f2b-8aca-5027a5dc8056.json and https://artists.proofprofile.net/proofs/artist/041b05cf-a18f-4f2b-8aca-5027a5dc8056.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The F-Side Country (Live Kitchen Sessions @Uppsala)
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 0xc83090c4e476e184ba590d93551399a62fce683395aac9835f65025c86807223. 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/QZNWW2111242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f8d024c19da67cdf7853dda25db83256ea0a1b77bdace8b7a1706f5a75b189. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZK6H2208986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83090c4e476e184ba590d93551399a62fce683395aac9835f65025c86807223. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWW2111242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb349001f96423dd70b169df60f21a4c5ca637e1480c255274c6c6716e849e9. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZTB72290008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6066b84add0204542a13ec497b8eab5dd02a9abf04d2ae6f30b3276a6ef39747. 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/QZTBA2288452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b14aa399c1839c84c1de8283bb2af0f752b162e00fb3bc6487a9364ca3ce797. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:59Z), 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/CAHQJ2339170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97232d194503703928cdb9b7406eb02351f17a0d4eb1cb72a66ffea4e5377aed. 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/QZDA42302186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976dbabd52a052a29a886a7ef82c48fc3a7142913be7e0d768f9faf2ab863bf2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZES82387188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da10b266a314de7c88a8cf5da156c04ee92f5c597dbbc105b93336a0b073075. 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/QZK6H2339034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc754f7bbd8bcbd87b5eefe029ca53e3fc38603b25bf703248b85dab79b50f8. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:23:39Z), 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/QZK6H2339035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf5a17b82d48900b0514cac14f46ca0e53f64a67d7214f30dd4a32469a21e09. 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/CAENV2349676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da75d4097ca8227d85f9004f0bb1a7a11e229750429eff7b6e3d905def930a1. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:03:29Z), 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/QZTB42332022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbe66fdff11ff1031d5ceeb4c9c68074853c09c0b76559e530bd7ca115ed4e3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAT2388571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27855e5e78bd3b0798504fa18a06d15e5b68b6d484337bd4c5a08cfee4e01220. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/CAHQJ2432258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9914921cb9cad6e895887fc3708f2db8c0b7ee7686171ad6b24fac006a13d75d. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZYJT2400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391be3972e503e8b48a3d365f5156a524caebddfa7ddb101a9ff0dac49488309. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/CAGOO2371266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99c01229ce4d30ec5b8998515f23cc25aef2a8c081833b5eebe879758ccb122. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:13:18Z), 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/QZTV32421384.