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 0x4850463b6f1fde8eb85cdf740ff10f0862720b675e2e60bf0ede3aad8bf7027b. 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/d33bb9c2-30af-4d5e-a065-982864e8240f.json and https://artists.proofprofile.net/proofs/artist/d33bb9c2-30af-4d5e-a065-982864e8240f.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 0x4498507ea60b2851cf2996c39a8226ddc39751c7fe8859fbb04e91e839d85d2e. 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/QZHN72289881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef2c5ffddf899b0b336dba96a173395f4892b6b1ccaccf3c5472f59c45d854b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6G2339241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64588692f02d9924d3cd7291c9eb9b1f3ce70a0f4e03fe69e0e8364c16ba7ecc. 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/FIE3U2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a0246bc56d2b2a57f66ca584462fde4a82aca421dacbeab06e6445325e3839. 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/FIE3U2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25690e9f726b88007d3574c2cf267f5e355e867e5ff3571a738bafb24a84587a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:40:03Z), 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/FIE3U2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2848e6c93ab2b696dc398a1aeb09d3fe6b00d4a27397e7ff7ac25896266e4c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:07:09Z), 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/FIE3U2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd856855295b94eeb76ffe9e498e28f39ea0d202f40703f335feb4323852005c2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:45:33Z), 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/FIE3U2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77f8a9145b125561d5ce11a25000ca34bffce11b3a71525a9dbf82404ffa477. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/FIE3U2500004.