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 0xc2f1c7cf87adb38465c921b1f514a4e6de3de22837ef3cc8435d25dca9e6e514. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4ba8ea2-d9b9-4f96-8c3e-1af168d359cf.json and https://artists.proofprofile.net/proofs/artist/b4ba8ea2-d9b9-4f96-8c3e-1af168d359cf.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 0xbd3768bcdec82ef6c29ada0457bde8b75401f177466e3dc8ec8dbdb05b3ae93a. 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/UKLAM1702003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968d0cb78c617a12aa160aabcf18ee0558314779dffd53cdd7a84bfe70b5111a. 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/UKLAM1702006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa1c0a324b02670a1007bc36ef12d6119e788215178fe233998ec87358e88d9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKLAM1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf835c240bd7138f48c31a95d6535e42ce2a2b15ed45c606b13dba1fb8dcc3249. 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/UKLAM1702013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0248e881a97472d4ebf80e434613a6a8888bb7a17a5b703a629e8971e5f6c40. 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/UKLAM1702016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b082636eea5055a9e7cb527a305a12a18eae8a34c6cb86d056a7de29bcf07b3. 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/UKLAM1800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67c200a9faf2fb9b5bb903dac3adb6c0ba093b2c485706aba4bdd3976100908. 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/UKLAM1800094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37da23dddc0affd5f64881e3f9004b0d6b885a860bf55afd3aa542d656026a1b. 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/UKLAM1800155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab294bca3f18a1debc6eefc824ad8139c68a787d7115f78af68cec30ee769d6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEK601604053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9411052cb2c79a586609ef034dd541a954e409c052a74ad230de47d8a8d9ee. 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/DEK601504027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5731392fb4b3766fc1210763786706ca427d34dccb2dfafcd4a3c6c4c0f3bb0d. 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/UKA2G1401006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c48fe8cc0a21fea89cdaea0c5d60f5c6f7063f57cd921312bf7dd4b7d822c0. 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/UKA2G1401009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7147e8ac7c6ad06d4ccc86aa46658c33c49e0ca6aff008691faae8aa0f4b8b9b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEDU61550073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60195f6bd5fcedc38ade788e99cb4a1adf94f4cdf7e87755e46089aeb32690ef. 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/GBQGW1600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1c57322df3dac275b72785312d357d96c916b53098be32648d714e15d59cd9. 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/GBQGW1600043.
Defected Radio Episode 085 (hosted by DJ Haus)