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 0x87a258180d4f61ee95da59452df4fb61b8093008de1370be54093f129fceb851. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/771e02ff-ca36-4140-afd3-b9d1ba02bbfb.json and https://artists.proofprofile.net/proofs/artist/771e02ff-ca36-4140-afd3-b9d1ba02bbfb.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 0xeecff856f7925f533ac55c58da455d56aa715b726b79e265dd07a8f7292796c2. 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/TWC011800541.
The Fairy Tale Begins - Lullabies for Babies 很久很久以前 - 寶寶睡眠音樂
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec86f4050ca5d46256a5723a01ce44c9bf5bdae3266c76b32de868a9863bb993. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:40Z), 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/TWC012110011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11129b292b748c04959b60ef14e1a3497004fd53fb9160354b8dc01226227bea. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:32:22Z), 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/TWC012110071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0f902775c2addc4195faed88618618d39f1f2623012aa15ab68569b188cda7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:32:59Z), 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/TWC012110111.
Music for Mother & Child - The 99 Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5683f928a7ae86a134033590f9a9fa31ef862f5f8b99907e2a3d7c1abd433134. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWC010805021.
寶寶安撫音樂－撫平哭鬧不止的情緒
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391f992af50fdf286be34611521ed30b64f7697c4e6193beb676472b20c27a68. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWC010805031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b19d380746b30a69f8a89cb31b743a756694feda0b4ddffed2336592c7d2127. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWC010805041.