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 0xe8fda431f69297e1db271978147a87ba0442dc0fd71df93da9b5fa13e07c5c20. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44c43354-ae09-40d7-b7d7-3dd59ee0fbc4.json and https://artists.proofprofile.net/proofs/artist/44c43354-ae09-40d7-b7d7-3dd59ee0fbc4.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 0x36e377cc372587057468cc7a84d4b6b75b19c3dc2b2f133d966558394b48eefd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZNJW2313929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857edd5d5b296be6e0109a8ece27f45ac67f9fe21498e2cc0462336ae6517ec5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:53:11Z), 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/QZNJV2374326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71291dac6e286a1cec1c59060df5c60a10f61273fb7738edbd676ee4a3b13000. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNJW2313924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528191f358a4ef84c91788dc8478dbfa127c44c7ec8191baef6ae510e4ada987. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNJW2313920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb495859a6de25b459690f320e4b6f5f8f02cbc6a2418bb071d013e7c607e00b5. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:06:46Z), 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/QZMZ92313177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d28e545fa1d5bb0617afc2edad29d0d19eb39ed4d6eae4914fb46ad4adcf500. 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/QZW9K2396052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52b3c388d2a532d751140f20511687ddb58d3061e58036ca06dd676e367bf67. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZW9K2396053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b221eee6cfd13593e60c963dd9d171763663586aba11146f213cbff0caf6ff. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:44:46Z), 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/QZW9K2396055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6a72579ea4193f67f5b4c13279f6f28a5231d66b711a342cd70dad6beb9a6b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZW9K2396060.