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 0x35249fec9d4350bef9f6b0796bc55b6de45aeb2fd51e2bd3124ec75beed9101c. 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/4f9ddb80-e7c4-4076-b6b9-cb131f404402.json and https://artists.proofprofile.net/proofs/artist/4f9ddb80-e7c4-4076-b6b9-cb131f404402.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 0xd4a62b95e826c2f5d33698e9467cf463eb4fc3fdf741ad76ee5337ec43d97567. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USA2B0934501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4def6ef553abec35e6aa84042b78304f21839157e79b3d2bf1388dabc72689ed. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USA2B1113904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef18f7c95ea49fa6b86a77b85533a2630e96811979c3b5a776fb6f030d21648. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:46:49Z), 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/USA2B1113905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31342058ab478806895c61d9d1f9fbf7ebc02a0369c454e20dd293e158a3466c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:16:35Z), 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/USA2B1113906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9fc461fc8a8a05d2caaa520d8e9ad1ac9e777d31e3b2d7cef4356e5178ae9a. 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/USA2B1113909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b070d6a659ba30cfcf285a49da03e796400e8215ce725fbfc7165d124d81cf. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:31:55Z), 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/UK5WW0000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9718b3077bbacb57ff987a0b46f736694454edc285b61d8010c12e03027200a3. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/UK5WW0000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecc3397d2ed5f6e2f1dd57f5e2b770ca8cc83d32f8f09473abd618fe20f4fbe. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/UK5WW1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e59ec1e0ed8cc5661a4474a36e6862ce07e4352e500abe4d294a6975d7a14b2. 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/UK5WW1900007.