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 0xd8443cdfe9a1e58ee513c67fb0fbf660648727b4946184ffd8a73e7e44cf304d. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fbb4c88-7c35-4419-a8dc-9025e7804cf9.json and https://artists.proofprofile.net/proofs/artist/6fbb4c88-7c35-4419-a8dc-9025e7804cf9.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 0x7061a0993156ce0d5d7cd9cef31d217e861e171e6bb83a79b22f6275899f22f5. 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/QZNWW2450046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61f95872bb6f6eaa05bb332f1259e29445089b6c53e04058d870f14a7090210. 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/QZWFG2335281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e9260fcab9c927b1a8948f36743b5f2505e11d1b806c901544a83415b7203e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN32363391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc0b9b999386a5b64f1f604ef36b4569fab11fc5722f47aa9e43beab6ed7150. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA52370608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf448379bd4a85c6c14e03e3e14756e1bb1f652670ea6b8e784447bbe0a6cbaca. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA62554143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137562bf8e40d4b1b115bc8b6106c277d128da86ab23d8a5114136db99d0967a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ42532015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0da86e25d6936662086cecefff170c2f2a8bf9753e8f0d045b8d2d99c831eb3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2571397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ef4f6b308603f66a083e44380dc5e3f459b383878a7abb013c9c2c5a4d6af8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ22580088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cf23ee17ded4ff8f58daf3702b03b1d85c1b81cf9f22524cd2b7494c43748f. 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/QZTBA2480847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5054a19708814fd58ed19bb451d7a959919edd43485b8485e562f8039efe4c95. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTBA2480848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e2a8f5e9b0af43335c83bb169ed6b26b690192bf63e13afb88c054e6e34fd2. 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/QZGLS2577007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7455eb0fc3f7b090dc4621a60a293fc7051d58f6f833aa2f5b0d21b676afefed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2577008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0da86e25d6936662086cecefff170c2f2a8bf9753e8f0d045b8d2d99c831eb3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US7VG2571397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08d7a062de43af22fae8da892c3f8ff83ee9e1893902c26ef6575874a77773e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZGLS2577009.