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 0xfe7f2988044455e36020da462a0e8ff3c32e7d2f50cddc971e1c472c976d2262. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06fc4958-cf4d-4e60-a325-5965787f83a6.json and https://artists.proofprofile.net/proofs/artist/06fc4958-cf4d-4e60-a325-5965787f83a6.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 0x7eb4923984045b1bdccca576d80aab0e2f8ed65e5ea0b5f2226adc73afeff147. 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/CALOE1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8735bf61d4ffd0679a7ddcc7e83ca4ddd24922fc302d2460b69cb596af998d7b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CALOE1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee24f8a85f6e23070aca84d8977a0ef0af6445f059dd904c6fb5d22e645c42f6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:44:10Z), 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/CALOE1400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c79f12e152b13b082083d895109dd0c10cfd6a123c550cab61ec228cdcae829. 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/CAL641969005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab169218c2b2de0a07736a753fdbe3b385a33a8fe7198bc451bcc20471d85cc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CAL641969004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1680ca065ef221cac8e3226712a44c2d351a44c6aacf1bbb04368eef7ff4f22d. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/CAL641969007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07beaa807138798282e0113d0766b55793a0aba068b1b899c4692d3df3b172b8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CAL642080001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f4fd2b06b0e3562adbbc91b9605dd13a97c11d3b3aaddd17992c81e99d1038. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAL642080004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5119684467fb7320884b4274e6b1028b0e2292bbcf98b0be3498189e8be2a5e8. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/CAL642083001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae3221a90e67d6628c54233c99b651e760d564ae8192be23f44140ab6711d64. 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/CAL642207003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76cac31900facbbd67cb1bc0db4868672056b1b5b2f7cef939bdb369d258d48. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/CAL642207001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dca33c9fbdf3caac73dab18f08c5c669e033f4f17c0c082baf3a32680625734. 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/CAL642207007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7278c549190e909314bdc61ae0c7d8c020efd460b9a12cde8122463bd1e984a9. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/CAL642207011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ad2dca8d6431b0a70f22c341094d698bc01357fd337ee0bd93fff12caeea73. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CAHLG1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4cfee8c2158f1d4ce7a7c74d3b0c66ce7d038af51acbd1abfcd9ca2774f520. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAQ661786004.