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 0x2854133e56e55b0d8fc6f15695791d2badc7cd549a0866f545065f9da1b39dfd. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16ebd81d-9e62-42a9-91a3-7e49f4daa4b0.json and https://artists.proofprofile.net/proofs/artist/16ebd81d-9e62-42a9-91a3-7e49f4daa4b0.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 0xb81cb9d4ab00601f4204a21966ae37282924fb6e9925c15314c07e946a4cb9e3. 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/QZFZ32555510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fd56895663aaa455b3d9677dbfee2602a86fe4ed9c6c7364e06179488c2a22. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZFZ32555511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5dda9fab7b8e4791dd01250c27b455f4adc00a55cf98c7e69dd63efcff1394. 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/QZFZ32555512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266ff1c66eec292d08be50025bc4b521df17df129d0fbc1e1550f4d1d684a3a9. 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/QZFZ32555513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685fec45be3c8b498f4ac31e4ba3b20a146382f4a2d387bdc56705a9217a7e53. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZFZ32555514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6f7052a80cfa725652b113b25379200f9e42babe0140dae5dd64e2b2c64e82. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN52564060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcf8c3ba709ab644c9fa246428ee509d9388835c8e2a2bfb46e7aa86411082d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:30:52Z), 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/QZK6N2596683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa604da06292243e3df7e23509dc7e03c909130da8629812666722fc79e70a952. 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/QZK6N2596684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b232599bda47105b9e9dab02e5788f3c0f5bd72448cd5cc14b5a6e215879e5. 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/QZMEN2502120.