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 0x9e601c3c27e29e869cf2730635532bd29c54097d5446cbdf04085de2fb1d8e07. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfd60676-effc-4dfe-bbdb-e06122bf07d3.json and https://artists.proofprofile.net/proofs/artist/dfd60676-effc-4dfe-bbdb-e06122bf07d3.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 0x75cc786372aaa9470de367263e03948a743f7713240197c29d068f55846082db. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZTBB2271355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0133c70b2e762ded0deb2556417567c6748f099a481a2a420f97449474d550. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZFYX2300370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13148d816f73216303e44530a965e02e89eb44bb70c8ee38e32f25299edbd0ce. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:04:15Z), 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/QZFYY2372187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27bdc259175c3794559aa73ccc2d8dbf3bb22f67580cd246d1b21e81863d3fe. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZFYZ2313906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203569349508e6f16a1bb137accfa006154e14df327353acd8f8428f633b60aa. 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/QZFZ62362065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed2ad9f63085eb567ab167f63793b7e3726d44c7b5f4b5dd768f9e2ba5d21f5. 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/QZFZ62362805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76a60e23a0a1391e10335378d7435fb50bf899a79bb0ec06754ede5234b70c6. 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/QZDA72393912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50fb0ee0e3f4b43dd2a56aee1717efea660459f7f51146ed5b8af1c3b644126. 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/QZDA72396217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44f1ab099d3b7d8080279c18e6073bf0e7b163c1ab7397e02a3a3eaa417d83c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZES72376417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462c50d3fbdd997d7d20b47424abba7a5c753f33327f0f203c78f75786d198dd. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:46:18Z), 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/QZHN42301388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd997df0f3726e1f121962aaece1696aa532f3885b4a6129977590898b25c626. 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/QZHN32344561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f20d94c0f2a7e8b12628e1a1317c67f2e445949ce6fadf305c4be3f35a5ec90. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:10:08Z), 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/QZHN62384458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f185a1d14daf53631d9d8aa85f659d65f424ed53dd38610afbd20b5aae24747. 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/QZHN62385228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984288a67c6b4e8c15e25c123ec06ba1b5caa06b0625d7867df673295e05df6a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHN82348454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06e19ec427e0456bd7e2f360bd702bda869135668531a24abadc1a41298cd98. 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/QZHN92300496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170c429310acdd20e84d8f516c97aea2dd9db7ec8937e3ec8d8f4a851e3a3b6f. 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/QZK6Q2300566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0286b08bb4cb5a54b1cfa60838a55bf8c8cbe70db213581500c2905997888a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6J2300794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0295cea61f98adae9f87cff144fcfbecb5996b86f1b0e4bd87452e2787965150. 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/QZK6H2369701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3937fc239fc25d19900f859db6e176b18046b81aed6c08ae475c958ef83eef7e. 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/QZK6F2302502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e2d380e2d34f64747811138cf40051cc47f515ae345ad46c9cd8c1b645dbe1. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:41:11Z), 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/QZMEP2349810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4a4b1813a07c4669338c94c978114055cb78bbeddd490e0fb000855754b1ae. 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/QZNWS2387692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbaf54099cce58403068410fea82891b39447a91aad692bca7a97d0e23b834d. 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/QZNWU2369220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d6d4518b0eed1db8deae6f0bfd42d509dd3d21bba1c55e237f4f6df9833b9f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:08:41Z), 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/QZFZ42551597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61a45dbb7dd8cff50aecd0a638e33c4d7747c88884ab878c017df9b51637885. 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/QZFZ62588963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9f174d8a6df2df8011b7d1636cf1b5fae5b7b260844af60f7cd52aacacd274. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES82557419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b2f107dbec05d070205a2ff50a2c58cd7de7f827abc59fe8dd96268568596f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN52536238.