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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 0xc64a3e01f7f8fb7ee45d649c173353ae2cde2f71fe5f223adbbf95655cc33635. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0d756e6-e67a-485c-a2c1-df7c90527348.json and https://artists.proofprofile.net/proofs/artist/f0d756e6-e67a-485c-a2c1-df7c90527348.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 0xbc981a89746117526d463c59dab0d5bfe52e5a32cc94495dc12adb0b52792995. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:49:02Z), 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/GBYRA1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dba88ca400230fcb15ec667c09c9bc8fc1f5b75f8590e66ca40b804486bb3a8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBYRA2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbc0f5666a2cca7b73814154d2723413d7bca347984e05716da5a1aacc5a56b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBYRA2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86b0074d0a7e03ed0157a1e4316b3e860661ae946d98203a6acfb7ae82be538. 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/GBYRA2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95336c2a522cece2363899a43f7eae752a706942dced52cb57b98caa3a4a7de8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBYRA2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c2ee54df5ec771d4a9609f840b644544e7355a45456fd5aea4414347e4e892. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:55:07Z), 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/GBYRA2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3b0162aa6e93f9e60f712790f9fd84630d119c8defe45a95ddd86ca0e758ae. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBYRA2100009.