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 0xe9fce8078c41281f7d0c87c6bc111882a5e5e6d1db8bba0ce69d0ce87fb32006. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19d5c75b-ef71-4f64-a29b-7e90108f9744.json and https://artists.proofprofile.net/proofs/artist/19d5c75b-ef71-4f64-a29b-7e90108f9744.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 0x9543a4b9dca596428ec0626a179174611985d20e6b3136f6e4ef0f6ca7317a6a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:12:12Z), 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/USL4Q2447771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eecfc8e183e2c933e70be65b4fdbae637f787460e44870eb8934805f4d427ab. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USL4Q2447776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91090add406e3cf2c5e4acb15d5d6a080fa4eb9a6d093af32ce06cbaea884429. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USL4Q2447777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2ed5b5bbfcbaf3d6ad8ce78a000c5cc4678a60d3413396c17b2dbb43ab91e9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USL4Q2447781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59543411dd10b970a707ec8ea6656325d04438efa1919472572743ff97358fad. 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/USL4Q2447904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f18cb7dda1d00b99f70e1b3f942c4b07aee8ab86120a56b9a947d4f4b985a7. 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/USL4Q2447905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368bd686fa2343783f7a60f99f9b863f9d0e1c40e0630a19af2e9f7bfc4e0a73. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USL4Q2447906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47644e7ea268c4f811b111779dd2fd7955cc7b8026f16af1ca533500ed40032. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USL4Q2447907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c98310845f12e5009e6dfa9090a29ace0f62cc336007eb15a518b7dc2276550. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USL4Q2447908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dd684c5a3cad5b038a1dc9994f825cfffaf2dacec93c3de065adff08e5ca40. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USL4Q2447909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a293bdf5754a875b417477cd089cfa1ac4bb7bc27f3c6c4ab5d600f41fbe8f6. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USL4Q2447910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd0a22736968f6d91ca43bc477c00a6faf018dc1c6da640d559a4f175ddc9f9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USL4Q2447914.