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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6a6d809dcbb5cf231635d78e592033d8c9fa63bf42858e58f6e3efc3a6a037. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15bd568b-a922-4a32-84de-5ddd41794c31.json and https://artists.proofprofile.net/proofs/artist/15bd568b-a922-4a32-84de-5ddd41794c31.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd80cbf46d8b02fc53b853eec4f160c8a3d375c230152f0a25a060b611a02ce. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFX2565818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e7b8ef995e786ac8babb3ba438c5fd264f7b3e40dd721d866c225585cb80c6. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/QZZ7P2531877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f752c457a04d88a74835b8e6c91bcea07c904c1b4bd855b70942b6ecc56243. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QZZ7P2587222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606f0b4e89ad1382ab0c36486c6f68686365ef0b4b85e00eddd7fd12270f979e. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZZ7Q2584623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234f01b190cd13f75cfcd89ea42b0b72671df7c07c7e573f403b9fb1ed5d1de7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZZ7R2544240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198a3ebe4fddb89eda4dca49ec41f9b68185f47fb9a7a3750de4918ecf09a599. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZZ7Q2595212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecfedf499196f8b8876ab7f74a1a01e6b9999e2f11046acbbf3b1af9fd38b99. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZZ7S2504342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5104bc66a0f650f0296d5e061b354debc8e7026d90249cf059c37a83d50d38. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7S2550388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995cbd583f05e4293b362ed6950dcd7876e6c342492646535cb43f155b77d6a4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7S2589856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba09bb479215f390e37a083065ca6744bd30546b82dc9fd9ed21ce7837a825f. 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/QZZ7T2534941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43c92196fb2f50fa1847d2abf1ad923d23ec83582cce5613b5fc83268859e0b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7U2593691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7a823cc830dec7c53b4d0e7a85910f4f33b282cc77e99d9e83722f93b9baa4. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZZ7W2539654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5cc61124808e1f86babb55d0ade2877d80ac16729bb07aad3f9c05536987c2. 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/QZZ7X2594735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0217ac58ea92b3bdf9a83e934a4e0f50b6a5c2bfce9107d5b986abd0faef3f. 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/QT3EY2511913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ab553d7f901cd744ec1eb39a08a38dbaaf9ad162da60bcb157bfcb2cd8cb02. 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/QT3EY2566272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451b14d24450f6618d289ad915524850b77d8036d8f3fafb4445a9b891c97b3b. 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/QT3F42596104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5378a0b29bedcfa442511bfe02b3a25b27f71119b3ad2fc4e99c09232098beea. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3F92556403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d1e80d42f848414fa21e6eef2950f3cf66f875e529831bf8ed3a90029d4635. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3FA2573911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47f7ce6b5454110ac9f214ba724c776a913647f235e0ed161cd545c71580396. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QT3FB2521055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb789c0fe74b1e0a6a4deb7ed824263e275ae10052b7b57237e89fe05b0dfada. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3FF2590464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe977bb7e75e366bd9809ef14a5626b6d40eb7088177ad1df0a939891493a4d06. 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/QT3FH2598070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534626bb5e33ce3b8d83e07cd3f98560f7e01e98e5c89ee89d9ecd58cc384f68. 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/QT6E72561843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183a6953d102d2e66e691bb5e9906ecb1ee8752a521dc830d8c280359ac49910. 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/QT6EA2515633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a4adb114043d8d330a064eb3d444ffb8619813caf0e13bc7494e665e6d9e99. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QT6EG2585923.