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 0xc10e35a9edb164070eeb9b9c8a232a3b0bf16ed4a8ecfea1274bbf68687cc0df. 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/b4eadeb7-d1c4-4495-8e78-2d534116dcee.json and https://artists.proofprofile.net/proofs/artist/b4eadeb7-d1c4-4495-8e78-2d534116dcee.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 0xa62aa5fa4ae9de66fac2667e370e56acb5a003eee6e6829de912d66a44a08225. 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/JPB602075852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a68e7288745a76f51be7e20530bea0629bbfc85609169a79bbd4a2688cd304. 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/JPB602082891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43364ac4c26445b1da20381c0062164589403052d044c75cc0f9a9f2b9244db. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPZ922015707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d0d168fc27351ce13f7298f15e8a04f050b2285e8957a351f6a4b8b720e78c. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/JPZ922015704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cde5bf278bb3b9e5d92eb2528b513673a44ad2eb8b10cf454024fa49ca08c0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPZ922105337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04584074125d645fc01740bab76bbb0660684c79cad509ecf0d677c224acd51a. 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/JPZ922109824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8c604e688873cc0b431c0ee7a78bfd2c0e739cb64bd9e597f451139b799bd7. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/JPZ922109825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434eccc0e124e4927d794e686f02eecd808849e6399731199aa377d455180182. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/JPZ922109827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f3e0e58ef538d3d8b092b7e92c4033273eeec3c72ffc252e5deaa673166ab4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QM6N22288105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61226348f9186e23f57f9fa626d704c5573bf2501c046274d7ef8ccff3294221. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QMBZ92263784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74896fa2da3c5fd92bce5315a044e2e260daaa2f2d184a84e6ff924e0065269. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:21:19Z), 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/QMDA72396426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22938cc9f0b074d09272c4c620adfac46d542479fe4692022ce0db51a81098ab. 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/QMDA72396433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09ddfa184142bf352542ffbfd298c841205c56c7653ebe945610996bbc8f402. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QMDA72396398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4213134c81823d72c35576171ae29b7140725288853422ff1ca4b29fd86839. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:32:23Z), 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/QMDA72396522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf01b16f4ecec9857d8691b6fd1d2d321f501153512cbc5006264aa88772240. 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/QMFMG2321775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a2f3723a8cc418fb2209ec86a5a0c5b9af419929004843e650c8f112bd30ed. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QMBZ92445963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6cd516545dba38636221052a0117ff3c5e1bc2bea3fe32d853a2cc23f8eed9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMDA62433348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafae90ab65ed6e8973fdf6296484d8ce5ae078b0fbb7cf87e03eda9535d421e7. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QMDA62433346.