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 0x826552421100c950fd37f232612745fa8eacec0ea7e64033ecb7c06e33b8113d. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e903e1f6-a9bc-41cb-aff8-2ff7d4a26074.json and https://artists.proofprofile.net/proofs/artist/e903e1f6-a9bc-41cb-aff8-2ff7d4a26074.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 0x5f69331993639a956426c171717b1ffab371b19aa141e7f0475442bbf78bbc02. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:38:42Z), 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/QZHZ42103141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2d9849122216cc4cb30e9886927b16f268f1705f154415d917d855ac894996. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:56:29Z), 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/QZGLM2134477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dce23cac861a5661d599f2d7801cd4219abfc746baaaf2051628309e008313d. 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/QZHZ42103145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc27b0d0b351e242bafe561eb9b25ff24458671bd2b69406632077381365a24. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHZ42103140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46038d7c86a3b9a59e98b6d8be4dc26b1a6558ff52cd8bbfd0f3f112186fbe9d. 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/QZHZ42103146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01fd9bdade772d9fe6074f62bb499074e8819da0b7c87a041f63463346d95c3. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USANG2475667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba7c073a7a6d981f4ea1a26b06fc4352f0d62565085106c35740c3c4689b418. 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/QZNJZ2351382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557d9ba90e58dcf92bc7775d9348900444e5bf5c452ebefdeba7502d04622571. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX762283311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2d9849122216cc4cb30e9886927b16f268f1705f154415d917d855ac894996. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZGLM2134477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260b8a63c3f016bf370a17b5f1323a03ad7e161cd582d3401db269da340cb40b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM3DF2449529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12144fbd6bf567f38125e2d4fbb8be8c89155db8296e736afa7bbfeb263b98ca. 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/USANG2487606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ed57176f057e74b6da3f63a3699642fed67e8a916b9d74c5e66c4c3667f826. 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/QM3DF2497042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01fd9bdade772d9fe6074f62bb499074e8819da0b7c87a041f63463346d95c3. 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/USANG2475667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca64d00ea133f6e1e1e120886a426c051684ce8a64aec3424720aea0bcd52923. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2443111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12144fbd6bf567f38125e2d4fbb8be8c89155db8296e736afa7bbfeb263b98ca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USANG2487606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ed57176f057e74b6da3f63a3699642fed67e8a916b9d74c5e66c4c3667f826. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM3DF2497042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0d06210a33a01e46c681e2762741dc2387638f0ce3c3bdfbe12d87966d9730. 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/ESA012514425.