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 0xe4d5d8f70cb8e933518401e2623b93fd21759c8cc947bd12b510307933591017. 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/dcfc9aa9-8425-412f-b8ec-c485f0451045.json and https://artists.proofprofile.net/proofs/artist/dcfc9aa9-8425-412f-b8ec-c485f0451045.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 0xd3ca0fa705feb831106336c16f928123fecd7115d9133b13b4178669d4b37f73. 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/USCGH1403670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178093c233e7aaa34fe16bb15b994244687335e9e3ddfd95db6b306fd03b5fb4. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USCGH1403672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7933a4793c206a14145b1799273fddbc2aee676367962cc5248f0b101405fffb. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USCGH1403677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4513dcdf278b5fec5d667cf2b64d5807f14b8f973e47bb9353a94db04f712051. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:50:20Z), 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/USCGH1391211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6ba19df1a9ca24916a8f3705bdaf7df9e3dc524fdedddc0ee37e1dc07138d3. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USCGH1391212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a397a09840ed15d03d3406e0681ab1168f3f6d498e51d329e5455a137adfb7a. 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/USCGH1391213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf197cf9ef365fec8e7ce38951a85e8988d9ebaf422307df81d22946ad4a2822c. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/USCGH1391214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0fd99caef0d36dd46cf9c34917248bf3106c8b2f6c5a4b69c4b119e2306a96. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGH1391216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ff9027b7218295b9e87b7784e242cf223c01a0795266819f28dbb8b8669ef3. 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/USCGH1391219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca4e400de4912059e85a0549c09dfdeabe3d0f4a10958524580eb4c58000fc9. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USCGH1391220.
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