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 0x6e04958dc53a5727cf97399420fb1cd88fc5118483b4fdf2e7662541cc575997. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/510b4f5f-7df3-4854-a7cf-ec58ee3936eb.json and https://artists.proofprofile.net/proofs/artist/510b4f5f-7df3-4854-a7cf-ec58ee3936eb.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 0x5d69d6b4a53b25a3b9f3f98381d1427b89e4a3399780f08f6e06a72c15b320d0. 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/QZNWZ2365795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7188985d945c9592cf8dfcbb86417790f8b992fbb2f462377027204c63d988c0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB32306100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56737b3dc5f2b46d2d59564a30863e67fb580f3a391f5dfe51de5851d0b4f3f6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZRP42490759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa744f14f1bf629ba545e1ecd274e1a09a37a3da2b537d5944e0a350e3153f582. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:10:08Z), 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/QZK6K2513209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6ae9119fd9fa0fb214c70640c5c56090d94117911595fd34fb57514b697ae0. 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/QZK6K2513210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4cfd18032f8309b9ad769dfa56a9f7431c6b3157ea1d8dd6c56ca4f008644f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:50:41Z), 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/QZK6K2513211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb67f0cc631e32f8286f2b85850f9eda6b895f5867a5641d2bcf675191c008b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6K2513212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d56a427e5a6cb99d743240d367a816122bb930e80751febd2b4bd25b4e1799. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6K2513213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350a59d71d1e9ed290edcfcc438f5a71d488d35fbcc703e518e2f9a3364e3b6e. 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/QZK6K2513214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af0ce97a1353637c1cdcf579eb0b0218bc5672ea9ebdb91dd81bbd97b0af1c5. 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/QZWFX2585838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc309016ab83dadeccec3bb90217a36e4809078764c631bfe587a6afea1bdc7f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7N2575227.