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 0x10aeaa2f7726dfe53acd31666434b7e10e1f5438315798d20a4979b81ca3306d. 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/2fe692b6-19ba-4213-b9a0-68d043eacc20.json and https://artists.proofprofile.net/proofs/artist/2fe692b6-19ba-4213-b9a0-68d043eacc20.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 0x328412d6fee41ce4c77d996391fcdc5f60fbfca7b8d27f3b46e0dbd8902d4546. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:23:54Z), 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/QZHN71992749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0497527c907fbe405e0bb32614c6f4c85d5d67f476e678757c29f33b0bc823df. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:22:12Z), 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/QZFYW2064376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fad7ffa8325289a686413fb081fbfd4586f38a378fc29589cf498c28fd71f94. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZNWW2032215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3b9ad9642ed01755440a2c18103673157261a809a95fedbfa9276e191bdf0a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6Q2119131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b2b0a2b9f842b8c6f618d8416317207a4238e0c66a7c303a507f6447ef7038. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZJG52250793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0e572dd1dee72d2e80a1145239224a5002ce0b313b0e84c813544ef917997f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEV2238270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1d1fe7d34cd6d5b0c1fa1311c1192fe02538a4ad7b04128c63db4eb06bb167. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6G2282568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb38fbc46781e99b968ccc688cf8c811416437c4232f038c43543d18120ca35. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6F2251981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98aa14c892f6d5fa940e87299e4329f1fccbfa88cb16db8138fde0563b603c6b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAZ2326627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2506a1ef5e55f96b253e815fc3eaf6cb6f7071e430ac8e6167042f826d648bb1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN92440919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406d21cc95a6c807c2d91cca26310b2db4e8246585ba250a2b2e1a18dcb61edf. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZHNB2426738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72abf9bab018bf700979b3028be66b35e3e3016d25bcbed507f856b6d2ccfb0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:10:51Z), 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/QZHNB2496392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aa7c8b51f4ff89f2b9529f8fb36cf9557e33b7c36aa66d8409041b094847e4. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:53:24Z), 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/QZTAU2485173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b5ec53fc96a5610c2ca330884727c1a4a665e6b992e8463108fd85b7f49d15. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:43:56Z), 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/QZTAZ2491242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe30f2e1241e155bc33ff8f33d08970711e64c0d16dd4271cd040a3822ed685. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ772411605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2088b02784790d6afff06727bcaef02fd3ae15ad1917c637f18dcf71368bc78. 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/QZHN82520291.