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 0x8fef90f6980631225f5c599126da6152599b2bd82191d1502ff3cb064e5c1b30. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3088f42-9fc4-4217-a474-c54d08af51cc.json and https://artists.proofprofile.net/proofs/artist/f3088f42-9fc4-4217-a474-c54d08af51cc.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 0x42a909577723cf6afa3836efb35f25a845712113977604f1bfb4d2b8ec2eb1be. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:45:45Z), 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/ZAMDQ2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0663ea2ff609868675db5f34cbf7aeb1abaf88a563c5de7bddfeef6385cd54d. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/ZAMDQ2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667eaf386be9a388d02b7cc9ba608a427a192caf7d7cbddcbe3ca4b89c61c560. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:04:53Z), 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/ZAMDQ2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991d78ce673e19a0147fe7bda159c89207168299929344a38d765e5bfbb55aa1. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ZAMDQ2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba98c4049c266a30f39b4dcf33f3cfd14ad75e9899db0de7cf37dfa7b597b67. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ZAMDQ2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b7df6bb7b37c143d6cb68331a4a5bf0177284cc427d609905dbd8782f0f985. 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/ZAMDQ2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5dfca8fe5a9098841c210562b0e62f4a10975e0c3ae37749d4c9762029fd27. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ZAMDQ2100021.