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 0xe1d0c20cbc74458ab1de8527e21dc1154557595cffbaf7c87170f8a24dcb6f57. 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/dcf82446-77cb-4f84-a53d-41f88ca88565.json and https://artists.proofprofile.net/proofs/artist/dcf82446-77cb-4f84-a53d-41f88ca88565.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 0x98033b9300bc01864af62309818e5fc385bef19360c08ebef7d7183e771d5137. 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/CA5KR2485754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4db4af364623f6173cd29f2407522e7d4186a4dd656373a0b501c8edffa6ac5. 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/CA5KR2485753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52335e6a4307475216276ca92a725007b2f034479c4218c2aee7557fedca34ff. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:53:59Z), 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/CA5KR2486133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6184bd97cfaf7179ffabad3357413050b7b89e45ff8d6015f79cfb5253f64d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:06:12Z), 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/CA5KR2486909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0870f96dbfa7eebfa5b05d939d2311cd7fffd448b067049fe0058f89bb9b9e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:47Z), 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/CA5KR2488112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12be559e7b3b8ae1af5229b0084f9244b499703194d752ea7d66d653c1a0a81c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA5KR2488114.