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 0xd363603f980cd293e740a1e639707202568adeed83ad689c81efa8806b139651. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/932678f1-9cd1-465d-b957-c65447a74b86.json and https://artists.proofprofile.net/proofs/artist/932678f1-9cd1-465d-b957-c65447a74b86.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 0x2507e0383736734d4df1d2121949f571cf3d333ed3d2f9d6cbce44a7b3a137e7. 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/QZZ762560218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8485b19e932c41374733df28f4cfeb6a83bba754539f00fe7ca98fb666491ffb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZZ782546368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3441335d5c8364320a9ee403e80d8550d45ef85354e45435186b6c3656712f1c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:54:32Z), 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/QZZ7V2528197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce08a812d331b844e89c620ebd0e5273cfd95ddc75bf0b61c24ea7779d8055c8. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:31:36Z), 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/QT3FA2550189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8a2500b0f16431e213fb585babaa511c38cc313a3417bf52b2f81e3d3d2f5c. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QT3FE2547141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa0c697dc24444c0be3d1766c9c0176e353bc55ab92f2820bec07d6f8371f17. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FG2537567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b95409465502e26a902357431ab980e7ed3564c24190ea28d08cfbf5a57ba56. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT6E72595021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436176a1aa3f24bedcb90019688bc0c9ad2c06e8049595ea145cd218a3c2f2e5. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT6E82550990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec063b128c58add2d50dbd2e1bbb329bc37fc835237fd8f96167e142f5b969bd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QT6E92598316.