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 0x5e88e0312c03077273f712ca9258be081afe616ad5faba9cf0e6ce7a7cafbccc. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b233978f-8f73-4eb8-8088-e7330383bead.json and https://artists.proofprofile.net/proofs/artist/b233978f-8f73-4eb8-8088-e7330383bead.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 0xae9db535d5dfeeb68c228d616332c11d502be0ec4ebc2a4403107b4ef5fabc66. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:10:46Z), 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/QZDQH2423520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f7e6d2b825cdf17e465b650f245b131d0596a80235f9097995b63f88fac4a9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDQH2501179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb529c82266a0762e7a07f2ba5c8e0131912c9858d7e88d73a87978fbc395a5b8. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:47:18Z), 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/QZDQH2501326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b245c9931a88f157deead5e9741d66b17aa0d2e832c401224db0300d9e4a6b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZDQH2504421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e81c92b3bc107fc1325293b2f38aed760613e22a0c331d26894672650639c6. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:08Z), 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/QZDQH2508279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a4f250da75f06cd3f28ace34185eed6d0126bea6fc39782a2d04b004cf2274. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZDQH2515790.