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 0x183eb342f3f2bf6ea7f5e7b0903f2c2486581907a95f01dab7fb8c07404bcb96. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d27de467-26a8-43ca-a7a7-aa3872e8d05f.json and https://artists.proofprofile.net/proofs/artist/d27de467-26a8-43ca-a7a7-aa3872e8d05f.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 0xa7caf6a403dad87ce3c694973cead588a4940afef9e4f27c82941412c5c628fc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CNA509538106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5186734c91c9fb4ccd27ad12b6cdc0ff80f79583c7a346fbd795724d970bd61. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:54:40Z), 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/CNA509538101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da16b89d2c4eef0f060ce9564049a73b978a1eae7566ff6d655bb899101d01f. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:09:28Z), 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/CNA509538104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8227d4b8b105dd46b14d9d2e5943ae07ddbf03360e67c794da30dafd65e954c. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/CNA509538110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9decb2f16e4c287116f843d90d6fbef7a247701b077215df32e15230d7d932. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/CNA509538111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa0e04c1ed370cf78502d4831d9086fccdf89e45145a9f5c39e2021cccfcf95. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CNA509538112.
Chinese Celebratory Music: Military Music for the 50th National Day (1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9430b4f6e4597b4367db36a8395e75994da52cd7158774ee2e6a258531c25d00. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CNA509935901.
National Anthem of the People's Republic of China
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2898275d059d5efe40371bf53ea094bc24c102c4ca8ebd850f5a32df5e03e520. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CNA509935902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32325435ba6cfd7e43f5677f8f22d27cbace866174152417c525a337f70462da. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CNA509935904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36979372ad0029e1fe4e1878c3570891d3f87e0d806b83c8bb617ba432691c65. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:23:23Z), 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/CNA509935911.
Chinese Celebratory Music: Military Music for the 50th National Day(2)
Chinese Celebratory Music: Military Music for the 50th National Day (2)
Chinese Celebratory Music: Military Music for the 50th National Day(1)