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 0x3383b42ea85951ee715404d89d6073be10c6db05a49a9080a3a1b02377dae1a3. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1090271-918d-4014-8b19-631ca86d6990.json and https://artists.proofprofile.net/proofs/artist/e1090271-918d-4014-8b19-631ca86d6990.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 0x2969c92905dd734916adc8160201ae77fcb8c72b2690a37bd9ff2fec864f1add. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:09Z), 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/QZLL92209321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc07b9606beaa90343ff7711ba4df89918e7931307a26a5b539ba259b458cd7a. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:56:56Z), 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/QZLL92261697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300a1a044d9fead73a6b4f791da6580acb083b4622a99b6019d2051a68781fb7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZMEV2206469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177a4c6abb9a7534984a57d3a7a154678a2732be15c9854649eb4324b6802893. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/QZMEV2264519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85d5f085afeae11328680164e1a7dd3c761462e980dbf111026ab6652b41fc3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNB82213587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b66db82c3da24a85292f54b7bc6f06db1756e357081afcdf0415544aa67590. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T09:58:40Z), 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/QZLL92374538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478e08da46443caee455b248aa8448b3f9d9adfdc00f5aca3436a2387a3f4d74. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZMEV2359661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fca285f765d99d954ce62679fbbd291fe06fd53aff66a757809a37ddbd8823. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZNB82329993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11eeeea4bc3ba7e7acda8e49e83be2637416496dabfe94851652b8c4d8ba191. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:22:15Z), 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/QZNB82339219.