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 0x937ce3504acb295eefd7ce01990330c58b88a84156376e0faa7f0cc6fba58759. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae7cbe6e-caf7-4981-a002-d693ca99dea7.json and https://artists.proofprofile.net/proofs/artist/ae7cbe6e-caf7-4981-a002-d693ca99dea7.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 0xf02cf23800bd369c4e7c14525cd687acf4c8b5b9f46bfbeab23d409417ee1c71. 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/QZNWW2313784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317daf866bee73a6372aace569fce49f3f897e771db33891c04c308028551237. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWQ2187124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f045433cc6144d5c697e013b925b39026fb764ab5af47d3aa134317fdd84c33. 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/QZHNC2150939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2af17bc02af61cb98a43061262a173a54af35a32b3945fcce1b8ebe44991855. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZHN32123534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cad0abaafee08561ce0f774bdf220ed53b7ae06cbe200e1d6c42f493051053. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZHNC2150938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cec2a4fbc1bf7008181f2fe6c99cf8ffdbe2567a2cd606701698aa6335b8fa8. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZHNC2150940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535518371f2d31b322c970b2ac05436bb54051574cc925cc1910fed4c7bf6ebb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZHNC2150942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c11cddbbb693b880a30b60fd160db72fed92bc6cd641b2f7b3e4a02faf4284c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEP2074145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff9e23f01464c6598db81c2dd6118aa97aa7732cd1222f57b046b9688c15fd7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADT1824460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c45a8554d3df0696306bdde14834295227bba5d8f83424f969ab0305c33f33. 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/TCACZ1777013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e97cec1f1f19233a1ed044888d97a71b49a53e25d4615aab5674ca09fddfc6. 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/TCACZ1777022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cae0133bceea7da20a999da835e91b791546c70af70332efb43248492bc3a7. 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/TCACZ1777023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7e10a084def1dfb17247303a3b90a59e584e954f287f63611ebe329818789d. 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/TCACZ1777025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fb3cb454255a074c65f8781bf240af308dce6a62bbf605c5138f58c0596a71. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/TCACZ1777009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0588f2d942f2e70305caf41d82fce835105c948755a63c63406dbbcf08d589. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TCACZ1777018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ecf9a220ba0b6292c45c74dcc6ea20a03f9cd426bf8e994118ddac8a7e97aa. 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/TCACX1727639.