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 0x9ac2c50328c7802d5e288208dbd93d6b56c3b3ff21044a52d9e2e91dde5eb34d. 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/4a4656ee-0441-402f-b249-6ef0dd67ccab.json and https://artists.proofprofile.net/proofs/artist/4a4656ee-0441-402f-b249-6ef0dd67ccab.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 0x6b063b1e121faa78ec044f135dc0ccdedd8f452cea2bf5be0af680244dea79b0. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZES52108517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5c921ba91e4b71967540d935314f78e81b05a8aa3c148ec23add9d07fc71b2. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:33:25Z), 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/PT7OB2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f7aa9df3aa3e838a11542d1a9670b8a2b2967b64b367eeb7f9e547a468a624. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PT7OB2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23605f595f009383b4af4b550b5a64586f5e2e7b2a1cf8b40aac1d69fa227e09. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:05:27Z), 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/PT7OB2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec489f9f0e3920eb73ae062a26df328c33a32047fa37be78016b379fa92bff0. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/PT7OB2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbbb7ebb769012cf828cb4ada0ffbf094b26961109d24c90ca6df03f9c294a2. 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/PT7OB2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78fa054172a9f4881fffd4017334b389d6b2334f9df1e0766128c2f98dadcb0. 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/PT7OB2300005.