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 0xe5e83ec6a4b715ef8f0e67dc6a27ec707a961e0e8719ce613e8093b164d6c37f. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c04e1d08-495c-45ba-8762-072516fa5af9.json and https://artists.proofprofile.net/proofs/artist/c04e1d08-495c-45ba-8762-072516fa5af9.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 0xe2d3b5b25cb9d363616cc4c376a0bb3b9c2b4029f8b765ac97d0907d676f825f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ792408509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672bbc63d61854817840024d0c38e6221fa21bb49dc0b5d2c5fedf501d02b8ef. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ792408512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3a04894b617d748ee9e0731260411b3cc960a78542683a4f4b07629ab11d92. 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/QZZ792408513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabeec84f37235f655840423177847f6217fdbea3ad9e3869b56933977af4eb1e. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:21:06Z), 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/QZZ792408516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd839a9198a674ff26d3a5c881f6184cc33529cce2e48681e46b75eb64cfe7cad. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:08:44Z), 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/QZZ792408517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240a85e5048b8a3f4822d2c2c22ae488fd660f421f2d0eaa91e97b2e22c05ba9. 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/QZZ792408518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a84e12fdfe59880cad70421ae98a07860b03de60f1dc5b9f0355e1935f44c5. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:58:55Z), 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/QZZ792408519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fe5698c04181a424a61834acef9c0384f7a62e056a0765e03b6e15161c9671. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:28:01Z), 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/QZZ7W2457087.