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 0xdc5cb442e688e4a1c4e290ed5d6fd981c674c14c747d9c9e6c9142dd0e776a46. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ae67a37-045e-4a6c-b711-3545c90f5756.json and https://artists.proofprofile.net/proofs/artist/0ae67a37-045e-4a6c-b711-3545c90f5756.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 0x8aaa5774d4ce513af231b364e1bfa80d404344296557f9aac62cb016c627da09. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMHK2321760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55912ec8e7cfb57467d2e0e4f8e80f0f30bd07d015f958c489336be22207ae65. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZS642307386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e7a1f94adb11c9e90d3db0d4f67d55cf1f2363c272c63332553a0bf57721db. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZMHN2341974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3988cbe233ea660e23d599e84cdea7b0dbf817808c473fa22ba7c793650d451. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:40:11Z), 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/QZMHL2330528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddba98a6a07a5400d8f152f0265a54037751e23ef9e4d0c022a3b3c7c1f61a7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMHN2320245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1207480cc1da7b5ae2a0c4aecd512e787c921833b1be9260d6bd6492b41189af. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMHK2364181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ea982db4d6770797f0a0e9fd2fbdcb13ec7108f2a45792da0e5900ad0ef593. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZS632326633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8bbc3abd07bdb5db1e141bcf27f1851bd5272d5a71d109f796e4eeb90f86de. 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/QZS642362012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f03604f3cbad5cbb5fb121b417b3d6c05cb7e139a36918d782f6b16e70a5ec. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZS652373515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf74913c1b465354fc048d6fc9cb3d43e645d2eea9f05381c6f89c5a77f0e1cd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZS642345882.