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 0xe758acc20e4288bf68bd5630946f86e0296169fb42fa6854094a0eb91d03685a. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cd62e1d-3088-4437-a9b4-25b05167ac47.json and https://artists.proofprofile.net/proofs/artist/8cd62e1d-3088-4437-a9b4-25b05167ac47.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 0x45b2a5568a86ecdd28e2d14d232f70c51327ec92e110a51ba0dea069378923dc. 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/QT6E92509969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cd9a61dd29eb79de7fa86579d1cbb6674a51e9c2c3e696c120ba4a99b808a5. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:51:54Z), 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/QT6E92509970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c0a2f52ea0051940fd8d847f90650aa3d8e6604a1d497986a35d200bcac97c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:34:42Z), 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/QT6E92509972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2677d140fe598e0e29148699ef68c5788d1ba759a839164d598cd73ccba6c32. 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/QT6E92509974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a2c6eec79e24aefcf13e3a8c1c1801f7e3579c4291727eba3458e4a899ac69. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:04:35Z), 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/QT6E92509975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefa266e9b25606a3eb0f081e5c38f988d01622b3a59f8662e8231b5a754411f. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QT6E92509976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5758e69d800d4c0aa84f0f1c59e42b99721b282ee8314dc1f0ad22d7ba4a57e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QT6E92509977.