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 0xad836b0b06351bb99519081aeb588588973a7479a1c38d3307a59a1eeae861ea. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99965194-bebf-489b-b9b7-7d36109a6abc.json and https://artists.proofprofile.net/proofs/artist/99965194-bebf-489b-b9b7-7d36109a6abc.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 0x3d690b0f86be4184d020c3e14945d097046bac0858c62da19388fb78bcbf4411. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCADZ1842027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec874ae3e9a144c6739e983846b668fdbbb223bb82b30a07ad158691b8f7bcea. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:56:22Z), 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/TCADZ1842028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97effdf41f83d435676de5c606f6f49be3396178d6b3ee7af3b3f6cb4143179e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:27:33Z), 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/TCADZ1842029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ae814e09363444160b75f02d4520b59aaff5e5da2cab1d38cd6130871cdbc0. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:47:55Z), 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/TCADZ1842031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4d51449849809313f7473515a8a65fc461b9bb78169f4a61103abcd10f6193. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:03:29Z), 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/TCADZ1842036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b4a27405d91fb1e1ebec21393af2e1339694855c1736bc3a774898b83ac917. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/TCADZ1842037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd367c6255bb405250b42e251ea8519323140d776bb3ba09c652b9b8d7f398c17. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAFY2102880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71e3daee2bb3439794118a8524e8935076107e3e3981f61d13215ac2609bbdb. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCAFW2124042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a3c2beb80c42850b5a0a0b6ec17908d42b953ce6789019cb102d734fcc2a25. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:57:32Z), 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/TCAFY2102965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8928232f260ef43c70bd37c9919f1a5e4066efdb6f797f241cfe51cd460aa3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAFY2102865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052db21dfa39dca1d684c8bc2b19f003d7f771d4428c423dc99d4f80b6ae29f3. 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/TCAFY2102974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cd54a4fab76809cdf534b47783009466abc0be873c08552174702279d8dbe7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAFY2102984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ced6209637fd6fcb6ab12cd86843c33e56337b936ec7750e495395ab9c43265. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWS2396020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5d2816f729cfb7d66c3b3084105114f3d01cb770484248a0bf7b8d6d0c63a5. 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/QZTAW2494697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057c8a2330758f923f7fa72099b1c889073e2f0a18016c0833f2980be006aa8c. 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/UK9AV2501802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5d2816f729cfb7d66c3b3084105114f3d01cb770484248a0bf7b8d6d0c63a5. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:59:06Z), 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/QZTAW2494697.