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 0x8b9878d3ce79d873ce9f0be963d10d433dec6cb2cfbe289684b7b2e478f4e02e. 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/fefdbdc5-21f3-430d-96b6-c643778d7265.json and https://artists.proofprofile.net/proofs/artist/fefdbdc5-21f3-430d-96b6-c643778d7265.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 0x4d800453335da469b4eea57f3bb8c36af51c9f2be88ec483c960deae153c94a0. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZK6P2094695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bd1de2e7c5320daa5df261f8b5a51caea7224d269cfddafc3d3489b1e50505. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM8DG2175420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793307e0c87c3c7f5927c9e99995963dda031463100a769bc2286b3e3bcdcf21. 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/QZQAY2191854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63c5c0f9305215bfad5203b6b7d8d68dfb05ec13599ce495e6138aafbe98815. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZK6Q2226299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf588588909892085362ca61c8b50d02890c2219a910bfb442af53a1a092180c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6K2263273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4bc9890397dcfc255d11cdfab04173cd40d969dd1d4a6c9dd2db96ce988882. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZPLS2291235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2025c54b7662c53851a34d930e0ccb6c0d472e0aa0ec6eb9c7efba989965dfdb. 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/QZFZ62347413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef635d01db3eebc5fde29c0540f2386941869891e56dd1d39fa56e4fd05012ea. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZMER2394958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8968824acec023c7153a455ae01b036a46ed8622cfac2281e0508fd2317a9b19. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZTBE2350391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47055ae00d5c278156c05ee112c084d3f85aa237ee1dd5bd274927f85c0ecbe. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QZTBE2350395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e5f07e10e3377eb3f7aa26b59b01a62d5f17ffa80cc7458a6ffe13fc5a1479. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTBE2350398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93895cd2eb28104ea0f374ac470c85a31ee0f5d3c1f37ef2f2b87455b3d0dc9. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZTBE2350399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6d9bb47fe39a824de3d2460b281621fdbd7bdf2869e8ddcf5d015d0372c2cf. 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/QZES92427374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d25c4dcda6382d47ffd10c771ee2de4ff1ff793d8682008434f10d4c47290ce. 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/QZK6H2429071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740721b69d4fcf3a0407f492449cf0d3126629c70ae9d6a557ab17d4e9b2481c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAS2450087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6c70d0e8beeaea8f30191af921f0157094fa2aaec675342eb000e3c9a646e2. 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/QZWFE2447811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bb67b2239c071f9e30b0eac81d4f1ab16359fd32e5a2f0ccd65d82e9cf6546. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:23:43Z), 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/QZWFW2477946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76aa4ec18b3bb734e0c8e8431a5cd3e40031c8bbfc332e8703ff7ba22d1fd293. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ62585770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e2d3a0baa27ea5c53fbb618c836ef6602d82bc05b8d64b2d7d547e6f0affd3. 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/QZZ7N2513715.