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 0xe3a47c76f0235c7e2d2e5bcb168f710bad0da0b033cb3a86b84723cca227106a. 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/b8731898-5585-4c84-b4be-3abc4d0734cd.json and https://artists.proofprofile.net/proofs/artist/b8731898-5585-4c84-b4be-3abc4d0734cd.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 0x26597fca17b598b53f56732d518a0ca70993ded5fd20b9c86e221a3fe42553f1. 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/QM4DW1826223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56217f4c971f08ba75502ec5c060fe95bd5ed4a295644dbe42b6d994e597e7f7. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:19:24Z), 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/QZDA61802453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882b503f2ff0741e4c116bae24f57886964d61fb7884d59ddbff4ca32031aa2e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA81810914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07db646dfdca472cd8bb2a3db8b073a7ffe5032c02d105a8725c2c0382a88ce8. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZES51859043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf44d668e429145a219feda71eac86280c411a2fb8ca624dff93178816ca3757. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZES81827969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2bb5d48338bae641d84c14884b9c0f6b1295de86bd0d26180ae6e4c30e6c3f. 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/QZDA81991815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60003eb737fdf67fa58990147b73d5f8edcca535d8cf00479c763b4b450aeb23. 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/QZDA81991816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d62f2792038fd78525030e6c78addfda4bf32343a1f4e0b8a0f4790acd7be3c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:08:30Z), 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/QZDA81991817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fa52c5669120eddf96c6300eac5f58abd1f162b751e854f0c595d894eee2ed. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZDA81991819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc80e5dad7619f46c677b5ee98c108433fb2b14354b320d2fc222ef1984dcc42. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZDA41935541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df898caec363a462fc0e61f539376701080dc82a2889310eb79568e1b79900f. Chain 2 (Bitcoin): anchored in block 957665 (2026-07-12T06:13:49Z), 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/QZHN71957874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7967609ae189b555b045a4f10212ed8f86d4f3259a935920e13f198c676204. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHNB1993160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493beee573ba0e2ee257d5511eceab4aa21ae38c3122cd5796de82a51c9477ca. 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/QZDA72058120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4b69105d1ad2610c2d6417a24d9d9c1938e7b8d52f6fdb3ab76c1ca1bb434c. 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/QZHN42056706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93baf6a0c9d82f75ca378d4f05b592cdd6583086ffb56bc96ee37262cabb626e. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZPLR2106220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fff66264f8d5654b23b6a6b9829dac035d744d71380f6f47aaf4d34482c92e4. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZTBA2235910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae064ea85d9176cc867c64074cd51f0e54b6416de784c93dc34efaa3a3138f3d. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:17:50Z), 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/QZES82344595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a1586c90c766392eb8c8dd862d6f1e1cf5bc250bb2846ccc4a0744fa5bd240. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZK6P2333139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ba5a7475e0b028ee7dd1bda4708b825a0b57fcd0c2e823fb86eb4959573991. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZK6L2357030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ed363f5cbe86e4884ac9dc42ecee18d1261cedcca83603d384832d9e431b12. 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/QZNWX2318467.