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 0xb9e74d834a5b149928681064dabb5388d5196ee6814e63fbdb344838b6637377. 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/7f9f0e99-fb5d-4707-982a-c1ae0a6af5d5.json and https://artists.proofprofile.net/proofs/artist/7f9f0e99-fb5d-4707-982a-c1ae0a6af5d5.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 0x3a24d9c30b31abd24d5fb34aa5b52db4fc3e32002a42685bb477c23d1e3f5263. 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/QZK6Q2398110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735ded6445ee6b1e26e1d945e7169fea9fe520766bd8e4bde2aae709aad5019f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFK2343311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e3d9cec346b01abbdfc407c53e21dd49ab8c3c8b8e94560f006fe088976b3d. 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/QZES92475336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47524054c002ef84e1293568061fe632ed19c06f39baff8380b97334bb940d00. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:07:18Z), 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/QZNWZ2486445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095ca5898c10879b40b2cbfa1a2fd844d2e02b9ccd36dd36eb483c2b01d7a4b5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:38Z), 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/QZNWZ2486446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191e649a35154cc9298a2f18bebeee3fd56e63cb698d3680e44326c99a890a38. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:05:05Z), 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/QZNWZ2486447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f2c3c308947a8bf7f22c3d1c0e443e91c4324877e27df8ad91dbf266606a61. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:39:54Z), 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/QZTBF2401283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196a6fa039ffe6a86ebb33bb5eda603255a4e9409ec04de45ddc337633959034. 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/QZES52558894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365612c5f2f37698e7d29938e81d974fdd25a06e778435527c4638934c66450e. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/QZHN42533026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196a6fa039ffe6a86ebb33bb5eda603255a4e9409ec04de45ddc337633959034. 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/QZES52558894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2c483f19534403f70c9af2c446a033759744ae3c15ba0ad23e00655c0d2009. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZTB32590443.