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 0x2ee360ab3cd2a7790f7ee2a04bb983f588efa5a7bd1617a34bdfc81ef40cafec. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b976c84d-6224-44f7-95f6-6d25c23c4637.json and https://artists.proofprofile.net/proofs/artist/b976c84d-6224-44f7-95f6-6d25c23c4637.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 0x42fc34a9ceadb9906e550d10f7d02773d82636d6c7087ffc2bb59c0c214c57bb. 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/FXR752412606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4ec6f8cc80d5bcd2b797950b59cb0d38d16e35fbeebf61d59b4a4bcdcedfe1. 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/QZH5E2443822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9278a7109f6dc4be0c5cb6aa601c8cfb03e759fcaffe51adf0a420cb7c2c0ba5. 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/FXR752300583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25bedd32d6393e7f8586c5c12dfb7a5693918955678c9002791303bb2d49a4c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FXR752300556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4118812fe07c38178289349c87dd1962d3d6bcea796104d9b74abf94e580c615. 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/FRDKW2315702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e927f63534da32fe905b7dd97bc52aad6d83fae167783a5bfc8c6d98b1dde25. 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/FRDKW2315552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8037800d70ab5586e976445d867a2d11ec89ab02b7515b88c803d6ff03bed8d3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRDKW2308610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad852c9c4b9f2b47507a9f5770ac2ea194f9aba775261b6d7ab42e7c69e84aa4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRDKW2207868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76471eb13bc8a5622777ce7c926422fdd5024b7b193fdcd1bead1ce97ad1b924. 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/QZK6H2206542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc029c6d0156a1bd0051fb82e68010b0aa6b192e6d46952d247cb0095ae9dd794. 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/FRDKW2202023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafb8cf6a1192986e43ce19dfe12d92a7e3f713385050f0f8b3ba42100f1e3ed. 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/QM42K2244964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72326e2d43a8fcd0f17aed661e9b9bdc3b9418761e7dfd2016fd655a58f99917. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYY2241484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25471c063f12c49cc072c927c112bd47374ead53aa936ab3b89570b84f85469. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAS2144439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030c43ce2784dbe923d40f2ebd8b4b7d0b97d44961323b5bb7d38a36d3b24e0e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZS632136630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b68c564bb49c3f4e904de3e8002c377df60561b37456bd2b62dab220b7822bc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS672134823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ced499c66095ca7899edce21b0d0b1321e0eebf06a57c24e99b1f24f3c5bb9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZS652174155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ee665456478d2543b78bbcc09e67022cc8416ea0e24c80f6d3dccda79c1b23. 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/QZNWR2193731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1217716d4a483b30b39e2543237555b8efa1e1238453a2659c25c17157788232. 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/QZNWR2193728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd86227e0c5cd0900e6ab2dca79368932ffaa13d88bb37f0bcdca193270ce11. 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/QZNWV2036432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56237032a18f7d920cf2b107fb24223647eb467d90d5643162ec29481c1ad22. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWR2190342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe263c8ca194c2c56591f88c849781200dc4f5332deed16a89c1a8fcf48bcd9. 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/QZNWR2192018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf29e9d497d19c6eb214dbe36867f7cfa192244b99b50e65db1af0ddf50a6027. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRDKW2207509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f9836c195c9a22969e55f9b414bda85340a1e15b127b0271aa94861c08418a. 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/FRDKW2207513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2569711a6b43303a0bbf3ce23c6db8618518175f65afac195ef362103be6795. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRDKW2207515.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch