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 0x2d1e10d21b0c7ac54ee4ffb11f200ef44a4d44be8f34c6718e1e31eff99ab7ba. 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/bbf49161-21d6-4370-86cb-77e7faafb192.json and https://artists.proofprofile.net/proofs/artist/bbf49161-21d6-4370-86cb-77e7faafb192.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 0x712c842ea5e55415d47526dd5466e20f232a844615ef693e605efd9b308ce4a6. 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/QZES82396012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c353114673e8afc1037aeceddd48bc358045f49eb2dec2a9ae7dd17ce9e497. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:16:06Z), 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/QZES82396017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc0f21779b07411d5d5ad6b4281d69d4113d79cb652fde0fcd79e469ba3958a. 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/QZHN72391048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da8e13ea70fa26f28dbfb7a92a39a14bd97c84326f8c1e3bcd269268250c9f5. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZHN72391053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a119da2ae903ca3fd0af59c4e2663217ae0eda4f15629a64ee3d8f59bd24d0. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:05:28Z), 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/QZHN72391054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6520bfdf6e117056ffe3635db26d18cfe7f3c207c1793f9ae42d85cb76ec9125. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN72391056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0247856fbc4cc71603224cd8ad90b6c5974d43c84c9f14383ba2a6f7e390c51. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:00:27Z), 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/QZK6P2382931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5bcd55224a2a8d722fc56b513b9ccfec6c60f517426fe52f74a3ac4c7c08cd. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:56:20Z), 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/QZK6P2382932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e9c4cb4ac668bb9c337bdb129c45eee5c70936bf2d6409acec72ed03913273. 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/QZK6P2382933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c39a710464b6b98e5ce48aee4ebfbbce8b221eaa70a621024ca649c2df82336. 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/QZK6F2321313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770a16292098176bef9271f4b373aad810e6ff7088ed9401abf3b34b91d0a2ac. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:26:16Z), 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/QZTAZ2367200.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf7f373d3580ffa62adcc53784ee655405bb86a392cbbb04edd4e9b036095f0. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZTAZ2367206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465d854eda7e68d5aa1df22b4a4ab2e898045717f04bf8f14e1c926eefe4da17. 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/QZDA42475340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1861d69ad7a18981313f935afa0be80c924a58cb41919cca7f5a458c1b573ef5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWR2443732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21d09db3ef9f361045e8e3065e0d70af16a9ef7d3129f85c9af59470127a7f5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:07:06Z), 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/QZNWR2443735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83786d084a2b9e134216602b9317f148d0e502c55807d4aea1f81da8287e21bf. 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/QZTB72440617.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad515e7d26d06301c253839194e2380aa7fa6759e66dd71377d8b40dd7a795a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QT3F32435557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6c32d13d8d037328c3ffe248e7d40bc2a86bd7e5a5fa507099c1184c2eb0c4. 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/QZES82536322.