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 0x08518ca0735b4645fe976d75d2cce8da688f52a0a739e44ebc7980d642abea1d. 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/59a57914-0c56-42e3-9914-a2280cad5aa5.json and https://artists.proofprofile.net/proofs/artist/59a57914-0c56-42e3-9914-a2280cad5aa5.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 0x692f367312c85015beee84d6f99de8b18dbc913f0e21df8beaab21e2172df4b5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UK3AZ1926529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e122568f1be56265804911c831fcb4059c84c5c40bf151e0c61f0333e5bccf1. 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/UK3AZ1926531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddadf6dd41a44b9dbf5250ca89e74cc2d59d97a28632c7898fddbec87a6d91c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/UK3AZ1926535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd355a004fddef5860ca8cc3ef037d7da5f605dc69306a27173eed57d2fecaed2. 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/UK3AZ1926539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788f922ce269114d2bfd3f44dfa41de4467984cf1ea8c5af153adea9f488c74e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZHN62040033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeac2b3c69ae697cbf5d6fc2e5fa0a8ed06e50f78dcee558f12e2b8df7d7fa77. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN62040035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb52e7ae1bc4a0a5d15df3e201e07b6139588b5337e811b28026f818dd2a6bb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN62040036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83377a535b6cd508cfb8967d0c221bc52becd9f29573f91a6a3afb24cb905e98. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:25:09Z), 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/GBLLT2140052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c3d4c11e2077486d7d62812a6986cf3773423489afae6f64537537ddc1e92e. 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/GBLLT2140053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b60649b83a9a84a4e0c795e5aa2fb9c706a6aff6bb84b8cfd04778ee2c9259. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMER2249710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026b5d66c0b10813a399150d2458716a8752fa0985fb41dc4ec5b5e491a91d97. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMER2249711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6f975a27affd0bb480191517ece265237ca0e6acf47e10f228fd39ce6cfd18. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMER2249712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09c48651ef1c9442640f18f5ffece2dc39e28b210133e4edcd3c95bd9336ed8. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZMER2249713.
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 0xe6e724a9fbde9d43df0ab7bfebde1914a6b13d20cb64b5d54aa669384156300c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZMER2249714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704cb6cc75eb47aae7fc27e875bf8e8a599839abd72d6b308fa04033431822b1. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZMER2249715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0d7d6bb2b0e5d6f7d5bd5d5c0b3b4d5043c121c96e6f58911800defa6db41a. 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/QZHNA2397698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063a091db45da7891b9f0147ee561948704fba499e2a8f2fe202a316a8b2a3c7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:31Z), 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/QZTB62465163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd827da5d2e468b8c213bac6e2e5df497face86d2ca7762a5f5fa4c8d52128f. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/QZDA62583977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913d82f9510fbbe8abd52c2ab58c30c4de5f047a28427e39e7d762305d4b7234. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWFT2578144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d182388c7bfe77bccacffb65f09b26aca8ef05879d1df3a990441fc2311cb9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEL1903359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9687f3096bf247181f23224d52db7e8357f977ba05acc784eec53be37f46be2b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX452429872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c61650887d80359e6d00629520317e59f2746ff47e4863a4cefddd001e4fc94. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZNMU2489465.