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 0x5632edc3ae44f68e1d5fe52e4fdc5f48dad43e754a19f4064a8fc3558b219fb2. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1932ec6-c856-4fb6-aae3-9c54631c1c7c.json and https://artists.proofprofile.net/proofs/artist/d1932ec6-c856-4fb6-aae3-9c54631c1c7c.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 0xcb960a2c85a6ce69d391263805217a46b4f2eea9c9875d178339508dae2562a4. 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/QZPLS2441963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceada636ada27051b933578c610df4274410c1f337e664785ff1dcf0fc0a5fe. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEP2426022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa65eef801add5b2f3f5bfb110a1c1eb6d9c4644ebcfc3c0e66a1032653bedc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMEP2485532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366ceb2386648d5241ad5d9144126d086d3482fbe082587b4f42562fd23a9dc1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:08:57Z), 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/QZNWX2430013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03113bb7898699ebcb0929200326ff2e285a74a8590bfe576884d36c3a80c050. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:08:19Z), 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/QZTBF2473624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbca45cbc377587bdcde9a3ffef2fe0a7c70b8266e62df2d0afcbb4f03caee0. 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/QZTBF2499039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595fdc8d5a1a9ed45e104b3d1ab25b7625d8e17c0d78d9917cd0672208368ca6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6F2572475.