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 0x22fdce486b377894d84bedca57959c4385d61854dea48340b6baafeeb4d2893a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63b159a6-dbb9-478b-b7cb-12912f3ac3c6.json and https://artists.proofprofile.net/proofs/artist/63b159a6-dbb9-478b-b7cb-12912f3ac3c6.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 0xf14740c16499bcfe6ac3749791f121287081b7ee46d32aa0a95adf02cdf88e77. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM7282099099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1420a800c42cb8ca776f7bea535c4c9a98b3340437648f6ae890c3e8ff1f6fa. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AR27O2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e5336941041151557bb38f862abae9258a271371f645dcc45df90ff1c49f41. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:54:03Z), 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/AR27O2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1f7a74c428776feed5eaf766154820387433cb49079a41ccf65e859dd94b1e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/AR27O2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf66cf52f837685ef3ad04578b802e97ab0c7dde4b96b59c361bf94348ca15c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:37:46Z), 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/AR27O2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b12392643b33db0e682758314c85b912581d41aa29b50c8e987431736ca5f3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AR27O2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daa328f554bba6d56d04137a53059ebddd72881b062c6c512ad36ddc4fa969e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AR27O2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf09f18167b341f367bddd6481aad92cf2bbd6fae05bf114582d86e249a6dcd3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AR27O2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240d3a0d20ac683e70e2eadc6b638d1c6b8275d6d8246e11d96fe84660bcbf23. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/AR27O2100010.