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 0xf0e083d89dc742f9062ce65618b35bca617232733ac34a2cc74b582f9ae69f79. 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/3f14fd92-72db-454e-93b5-ecf5674d0e8d.json and https://artists.proofprofile.net/proofs/artist/3f14fd92-72db-454e-93b5-ecf5674d0e8d.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 0x8ca37d2d05ad229d73ba7b00a5ff3a6806e9034f47666a584463a2e28012b2ca. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:06:41Z), 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/QZPLR2040223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda15bd017cbcdfe73d0758cfeed097ed2c01ceaae1e29a8c2964b80757bc2af5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUNGV1700340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb819ae09821ad4504821d321f598944ec8d6ba31fda44f5ebd0d3167983480. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA42266280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266654db33a6553311e4c4a5ad413d9773469f252d9c7c322ab1d878f470754e. 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/QZHN32277561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad09695d5fe49ff1d1f1de251e046ce9356cf844a5ffef09d2cbc64c888023c1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNB2237420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d8b0c15b06560412d58f2b60ee3edbf1588954f5098efc00c486f1fd77534d. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:28:16Z), 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/QZK6K2200990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3d2a93995f80679dbd06bfd996fbb45646cbb98bda14d488a57c9e35eee0db. 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/QZMEM2468827.