thumb|right|Rhyolitic lava dome of Chaitén Volcano during its 2008–2010 eruption thumb|right|One of the Inyo Craters, an example of a rhyolite dome thumb|right|Nea Kameni seen from Thera, Santorini In
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 0x5278ce621d69738a4ef8b84cfd690ff824eb9f71188ae404b7bfac39f34d67e6. 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/70789df2-d798-4572-97a5-3e1067294d5e.json and https://artists.proofprofile.net/proofs/artist/70789df2-d798-4572-97a5-3e1067294d5e.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 0x032b5d2761afaa2672846c750a2e4de2b79942872259aa3c556b95169578735a. 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/QZPLS2291283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a9d1bb918dc6aede853b42ba241f68d2222d20971b1c17e9145ab484f549df. 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/QZPLS2291285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb39b2fde9bf6d31d72d68c2683be81bc6077d47dcb5e58ba220e813d28ad40d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZHN72394105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90966719fbca0f6957d4c15278606abf4d321c3b5c1e7ea99c9a845be755b33. 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/QZHN72394106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195a7d3ef3d4b39258c97e59e73abd07faddee1b80909971fc855c84cd4f5513. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZHN72394107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b31e771ddc20bc84d550d1f9f14e2481e8d8ec83f5e334d8fb10f9871c05a9. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHN72394109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a419a793deeffc790ce7a1f30876d475a7c0bf9b8cc99552e953ffa50ccf97c. 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/IL4040102105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6f61cd42ad0ed876c85de1582fb16fe9d1df0bde70d113c13d369f6b3d7d4d. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/IL4040102106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8874234af53b39e9b1fb5e17f24ae1234d7d2ee96c23966082fac9b3033bd192. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/IL4040102107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2735b01a3acd5b132be76dafb3e61afd05522f836a15b585fe7d58f8a82e2ac1. 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/IL4040102108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec639aeb992485573cc5384095cbbf24af6520b970254ca261e71970f2fbb9ee. 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/IL4040102110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1834d9e37acd048535c79be2058114a1c209ba8e1b6b06c1dccd35ce25d453b. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/IL4040102111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d9396557355e89c2d2bc1bc376e315d1371771b502083b6c3a2f53033e42e2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/IL4040102114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49500cc1956ce6c85efa2bb97f4be9ec477ca670cda317be8f8acad8cd277ef7. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFJ2557355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4dd2725e0c1b055ef940a0ca0fa927858142e614669c7b6eb8290ee93dea83. 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/QZWFJ2557356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99379983b08b3dae5509354d8a27d151779d69f1dca7b48a4b95b78d2e10e59. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFJ2557357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04eb844c9b4ecd17650c88dcfc9de7a316dad2b891451f9feedaea5aa1ed0ca8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFJ2557358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d506bd3dc1931d609c2d0e90eab7b5bd6aca3415474787b27eff2f308660544. 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/QZWFJ2557359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b27ae40505c6bd44b67fe1c756e1dfcab992cb3449bbe45a2686eb24cb859f5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IL1012301455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57286bcd3eff7e6a4fa2319b4a7cd46261e8e401838e5d410896c8668231f11b. 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/QZHN72470586.