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 0x06c4a93b88a6929784d12a6dfbebbc7e3c9dd330ff1ad8d1aa23265be8f8af5f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d1f05d2-a7fd-43c4-beff-13c4e7d6b174.json and https://artists.proofprofile.net/proofs/artist/8d1f05d2-a7fd-43c4-beff-13c4e7d6b174.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 0x09293b465210d5aafa9ab1e09e8569c6b0a1f7b0098643da90bcb5c528a0fe38. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:49:16Z), 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/QZHN52288799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248dff3785abdc3e91c597fa1f54b03653de8f30db8cb278825f9c9146e659a3. 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/QZVEM2395109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e5c3756df0273db11d659998c3a21294b0429f7db4f4b757abbcff44fd3764. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZVEM2395110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43489c99b253b538427e0eeff838ec82cf776b3271a6477e4aaf4431c0df3b00. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:45:40Z), 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/QZVEM2395111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020fdc373342ea1eb8e7f0df56e2d7f43014e03a578f357b365935661547a314. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB62251875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293cd1aa41f9cf838bec8a6b786f688938a1b98779b5472cbe37c3b53a963bed. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:48:25Z), 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/QZVEM2351789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccdfad2192bf1f7343b7835304d06e20a69b991a9d769172c29b605a7616baf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNC2226224.