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 0xa189497e4521dd16d1ba1e8091e6d985a26a01464fa810c2b434251a12a0c6bc. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5a2b660-0105-4427-a633-b236e4b23ef8.json and https://artists.proofprofile.net/proofs/artist/f5a2b660-0105-4427-a633-b236e4b23ef8.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 0xacc5914bdbe6a07c6b280de1ad0722747f4ed5e4e690fe62e8e0f91a6eda3393. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:48:24Z), 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/QZK6J2247246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5ac558a50a82b7b7e9a19002dc0d0551a50eed5d8607cf2c2bf915c2f293b7. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:37:18Z), 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/QZK6J2247253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516ba8f92ae36d5d78f3a80e89bb7f91519cd92d84ae4e4cc583fc94da8f3aba. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZK6Q2303721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d664d052733d8785a4994bdd4e71d28abe5234b8e29669be4cf6cd77d9093a2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHN92438648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a11fddf5e9a1e8fac4bc45972894a275a62c4b4aab1836fdbc35b3b20cf17d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWY2420328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010ad5bcd2db24af85e708aaaabc12118d5436df41944463e127e69b71aac127. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTB52488890.
Square's The Beef (Unofficial Wendy's Jingle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec352b167c50ff18c2b83b62af8db5216c8ab61c5c4356872a11a3f45edd36b7. 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/QZES92505435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc551bfc56823548e738a19d207f700826156bdc2e6540fff8dd7db399cb68c6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWU2530635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d231733557e7170a600637612ac42ca36880ecc6936a501b8af810489f04cd9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFS2565812.