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 0x4728cb66237695f295cfbf0fa4ba8e671161f0e8fb10f2b8dceaf1eead9d1a29. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5961305d-5ddf-4210-86a4-637fe4478fb8.json and https://artists.proofprofile.net/proofs/artist/5961305d-5ddf-4210-86a4-637fe4478fb8.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 0xe9696461c266b5f047d2f8bbbc78bcebadc5c84564ef1770deb6630a9c84c9bf. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZK6Q2483808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126ef880e7dc85c256e4af4b6e9df9db917d1484a670bca63137b59db9f67289. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:17:11Z), 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/QZK6Q2483809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecd61d3cc2f7d41d09a8f8fd404557f7e8be85f06d062b18a27244b57b265b9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6Q2483810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846c98a6c0e922d3d519c06debe4eb25583cb583f83207a222686617d99b51ff. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6Q2483811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a294f320e9482eb800cb41edbab8ac626f3b452e29f6925665a2d55afe9d3a3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6Q2483812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65136b37a6cd623f65b7145c5d1e05f016e67d495a863c0a6fd78ed4ab6a226c. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZK6Q2483813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb388762bb21c750c87591f5dceff586cf386c6ed0d37bad1afcdec8e0356c0ab. 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/QZK6Q2483814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a49d2ee59d827b6b732a6898108992a33dc4e2270130ebf7b499147fc67b96c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:04:08Z), 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/QZK6Q2483815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bac8d81bc881453bf1b9005b976dc64f9aa54244b8ecd3eb95a571136b953cd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6Q2483816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49463025900301676595b16857288e53fde4cc681cc72c7b57611571f0da990. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6Q2483817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291b01092d1b6d22293467c937298c5927267474662e2e14c1d81c55ad5851fc. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:47:26Z), 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/QZWFH2437143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cb301a9b2d57b286d7dea024dcb8ac9983125ab2b64dcffeb2457cff0a50b7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USL4R2499180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225426e4a7fcbed3f8dcf2fb77652e73ea8f709cbf149a705182df29a429578c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ762419791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553cc96af501dfe1c5647da7d2df0c735aaa3cb9b65a4c3915af2052c8dc5d11. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:41:25Z), 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/US3DF2501588.