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 0x46216688556fc42cc5b1e0b23092a40bde3ca349cc95321ac110d081b9c834f7. 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/abb00b8e-0eb9-4ee8-a5c0-adf7ed526697.json and https://artists.proofprofile.net/proofs/artist/abb00b8e-0eb9-4ee8-a5c0-adf7ed526697.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 0x124333b589fecdc44d5987764d7a9294a87a372117e2b4409599d3c8acca0566. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUL10300178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3fe035f555376682a11d1412e6025bff3354215fdf58fbb89eea19fa55f61f. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/US39K1995401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192756c706669f7dd4c0e64b9d8e29264e8b28b37618bd02df0adc13bebba9a2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/US39K1995409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cd8af3e6ca98c9dadf1f62686c753ff7ff8d9d897a5c9d4e4c67322f76c600. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/US39K1995203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b27b9413991aa947e8d58d99d4ffa0a76981933cb25514fdff72d29d5c284a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US39K1995204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e00d5071288386e68cf88e8640d5ae0ac4c2c97cdca52cc0b67e04d1cb6363. 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/US39K1995206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906eac8524c63697f0ed7e29826c831ee1b0e35e6970d0112742a83310a89877. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/US39K1995207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0cc8a70f4a54bc9fcefbde8917683b837da3196dfa61a881a2087583b0e8d0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:22:20Z), 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/US39K1995208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fedf89050a55d80fbcb8ee3efa419d9f4bd6a3fd09045b85e3f19a71a2b42e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US39K1995209.