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 0x90543eaec27b43cac2449e01a607337724f833bf005f2657fe1be7b4d493d370. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f359b88-3c69-4ab8-bfc5-c499d5fe178b.json and https://artists.proofprofile.net/proofs/artist/0f359b88-3c69-4ab8-bfc5-c499d5fe178b.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 0xd182ad5ec0d7a19c66e68c787dc6e67fb48a2aebb39c240033c2e689c2392342. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SEYOK2416584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be9abc8f093aeaafbf9d74a76dfccf7328fded37de2a8863aef354d79d54fc1. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/SEYOK2416585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16007d34ec8bec8a9d54620e7c9c868c9b25173888a87278b5045352e48d6f4a. 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/SEYOK2416586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b1ad86d80a9ba5c895a784dcf15b7508d1aa70bfdc61f027d7e31dda0f818c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/SEYOK2416587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118e024edab97d6102d4e43c6052e2593f94ce89b150f91bf310e83dd43d9fa6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEYOK2416588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae01fe267f3ed3dcf84b7f5eac32355e88b7001f4dc31c260e8e17783d4ada92. 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/SEYOK2416589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3cc6ae318dd6d0ae6c4056af00b822b248b6a13620755f028917c801ad1bc3. 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/SEYOK2416590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c30952037fa981c1774f7d68c25bfe278cd220eeac69e3c9dc6d6717b6c14a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEYOK2416591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d9cce2c4787505575bc1c23efad0c8aa9813cd156fcb35464beba3ce25f6a5. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:31:15Z), 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/SEYOK2416592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfba727c0e3249185f4a2e874b475023adeb74c8c3bfdf32517ae6f2a9e09a1. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:23:06Z), 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/SEYOK2416593.