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 0xe7f2ca51db79440e9b25bca670e978a9635f37b9b242c8d11cefabc3834a2068. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed09899e-d4ff-4576-b03a-1f9460ff6e66.json and https://artists.proofprofile.net/proofs/artist/ed09899e-d4ff-4576-b03a-1f9460ff6e66.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 0xbf10d7df70b78d93bdb27c5ab4fa2196621ec26fe9b8916ad603ff337353f084. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GBWUL2430580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed16b9762e7622d855cb5348fc700326860eaa256622e8a6d3385fc60e9f595. 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/GBRKQ2550996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc56b8845f34409b5da65b98a8ac861cf1c437ded768fe0c57bcab688dcf292. 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/GBRKQ2551003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080b39af848accd440dcd8bc3a3ea18407b6db924c639fc785e240206835bd80. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWDD2514113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b2e0692a76cc724349ee0b1a75cd389333d67c8f55cf9bcadf94c58fb95394. 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/QZWDD2514117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454bf33cd88ed2b24191dededb72239ef3495797cc5a9003b8b854576017bc7c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBWUL2589998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11558e3d32aacbcd8946059af752a772418a1b52e4e6cf4c89864b778c6e14ad. 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/GBWUL2590015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee2a5bb89b55a641ad57c6cd5af3776397084fa9c075d94cda5dc4ceebddeb6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWDD2570092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d75cdf243991d60c61dd64a80ad614c23fd7c5bf7b1c6381e7b1d8311a2747. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWV32566453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3908ec0f5748ca220be31ee25f9e316f54c9d1b7bc3ecab44ccaad271ae13f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:22:20Z), 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/QZZ8B2548642.