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 0xedcb1d4df56c808f623f2ef56eaf59482a5624ddfa56b171d89279bb7ef402ec. 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/dc17c1da-cd14-4ee7-b774-464dd562e573.json and https://artists.proofprofile.net/proofs/artist/dc17c1da-cd14-4ee7-b774-464dd562e573.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 0x378f55a74fddb98602e451430915d5210aa5effc8b70e7693a75453eb70d6e59. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/US7VG2312587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d351322e6595c61dde10e2ecec51a934fcf426f422125666afa83bd8699196. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US7VG2312588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875c1235c01f76648c63367136d6e99e9e5a6d31471a4dedfb7d587fff4b283c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:02Z), 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/QZMEN2353715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63829392ccc62bfc8c57b448e6afd08cf3fea8e2f3f9f7dd9d7d545748fb342. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:14:21Z), 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/QZPLR2382889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b39c5af9a11b487b6aeaa652c6b1f7f80a9b2fe9daf783ac8ecc4e15054c2b8. 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/QZTAW2329875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0322fa9c3fb69b14a2d8193e625b0d61ffd4f67a407ec25d5b6aab57d66366b1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:10Z), 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/QZTAW2331533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089e73e313a68ffb02b42ce407ef2065d218685a12518b5784481170be44137e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN42417264.