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 0xcc94ae7074a877230d688d0f76b949c58a8daf3643b074fd112106696c908159. 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/8930ab74-a030-4e7a-94c5-25d0acef0fea.json and https://artists.proofprofile.net/proofs/artist/8930ab74-a030-4e7a-94c5-25d0acef0fea.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 0x18dc8ad8398b51ce9ff1f7b927a68a5fb01da3ebe31061a45569ee4d0a76adb7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTBF2409145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ea9b94087896fb3e99a70eb881288d8b5f9a8efe722fb9dd08920712578c6c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:32:50Z), 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/QZTBF2409151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b268136b52d1ef058992062e765fa741bc53bf1d32236493f360c56127a02e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:30:47Z), 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/QZZ7Q2403415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4259105edd722357d036960121bdb951b5c306aea8086978a8410811928738d4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZFZ72562982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b9badfff41eb2f749cb53e3656ff7adcdf5e45b9564c9a038bec0ac4aa80ac. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZES72562553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7776d911e9b16444247a878c9cc21cc7dc9d6e8889d11a9b35336a61ce1307d4. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/US7VG2500722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b6c7001bb9e528c38c5a8c36b0bcf24e7032bb58eab6c394d285aed378dad5. 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/US7VG2500725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a39df0e55df6267d45663d19c5e44d293f0144829626406a52ae59c1d0ceb8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US7VG2500723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb17ba2a1167453fc0b089d5f1ff3f9c159d053ea7c6f4a5cf323dc73fcae32a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZES72562554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b5164e02e586b666b3893927c7df52428d63695ca54351db7c010aedb5d4ae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES72562555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c34d3bae5ed5232da3737687989186a719eafbac1a5048df6fc265279a92710. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZES72562556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57899a14500dd330e13f79f3a67195c8e17f6bb916b55637f0d7e0d1113fa92. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/US7VG2500721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f36ffac962b40bbf1a95dafc1f1c616ce7a6788b22c848a51e8e9d2840d133. 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/QZES72562558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad81d85b02a680539ebede50f1c0ae49460534695b7f0cb025cd89e652e85ae. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:46:19Z), 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/QZMEN2500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3044db41369a0c4612c16c76f3e4e34e656c111ade103f75cd4872e7b9ade8d. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:18:09Z), 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/QZRP52527128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c958b7e32ca48f390e7bbaca93ce9f05212742269c53162de0cfb23c58243d8. 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/QZTB62507300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3b037cb09a34a1e167a3a89a84a6d2adc0ed4d15ac77a9360caf5de087ae8f. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:28:16Z), 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/QZWFR2575085.