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 0xc12120b911c01981835f4b26685671b5ed5fcaa913ba7ea4c53e630dc49a3c6a. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1e1576b-b445-4175-814c-534deed233c9.json and https://artists.proofprofile.net/proofs/artist/a1e1576b-b445-4175-814c-534deed233c9.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 0xd62575a13b930d7c43263b07922a8409a6cee64f07e4768d4d9b28efa8ae10e2. 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/FR59R1964246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f945aa70b67930de73dd5f3dea528145afee433e9cec983b1335be6989a67a. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:27:23Z), 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/FR59R1964247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7357ec34334efe2f2d5d394d3f2b1c72c7732a3fbd5ae64b684760628761282. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:59Z), 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/FR59R1964251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db113692f79064201c530c26d6e9b6447c73d53dd87bb2ad12d28c258627b1f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/IDB202002194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a6c845d6d3a07c79c86a9d1a109116c7b17377fc600586a016b8628683b06e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:07:43Z), 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/QZN882172383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a4da30b636fff25fb3f5f212013d57cee6938818eb40ffcc293ee4e6c46d2b. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:51:54Z), 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/QZN882172384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a0adb41f848b5fd12ce52f925464d99dd3811d0b577de3c193d9ef24e549a3. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:59:44Z), 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/QZN882172388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a37bef0facc8e17d7c620b5bbfa72bcadf246bb1323adfb1996a2b2ef8b86d. 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/QZN882172389.