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 0xd77fd722432fc9400baf3382a984a005e7797779b2b5f8e9db5b7686fdebb936. 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/269630de-7adc-4796-b635-6ec723974ecb.json and https://artists.proofprofile.net/proofs/artist/269630de-7adc-4796-b635-6ec723974ecb.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 0xe0ba51360da7c40121bd3c45b75e9043c2eeb194fbd72a3c1bce1283f3d49225. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZHNB2095611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f130573e9f445c6bb52a40749d1c2ae5d8256bf33b6b5a401071addf4eae90b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHN42039721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ba51360da7c40121bd3c45b75e9043c2eeb194fbd72a3c1bce1283f3d49225. 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/QZHNB2095611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d9133f2ed450ddf745bc7cee08b7090c954ff58532314ad4db27313f5b6ac8. 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/FR26V2040114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07223ee1333ef5f15e232372fd7a3b433eb3e209cd9ffd7c0c98288c69f4f2d2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ32015517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d9133f2ed450ddf745bc7cee08b7090c954ff58532314ad4db27313f5b6ac8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR26V2040114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec766d04c7994863dd4e895e74cb54de64e008127235505a054f2c277496f1bc. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZES62132420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70eaf15c254e6ae4ba85e072ba72371a2ccf7282bbbb1f1c87b521296ea68fd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6M2283565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5962b19d47abd5f3e387df9e4c6f6e4deedc0a50ce0fc4e6d8d6f91227db8b42. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6M2283567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1dceafe9a0e92b1dc86532ebfe139aaf17b940d705e4c417fab402c1940681. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZRP42110904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef980f65b8a2d7c2c09e69feeeccec976597cb8ce433269a75c4906eb33913. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZMEN2157225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885d03167f652082de5f399a07efc51590c1daadaac288951b4db6a508a87bc2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB72319795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607f243026950f99e2d3f4c8acfbee4ef57a00b1bbce39528669409bb0e063cb. 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/QZZ8A2429083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263f39565fe36e77127d6e9e7852d9b35fd7d3a1cfb2786ce26d2da0a7da079c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZZ8A2472956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1d92744847af334286cebb47d796113baf48d0e5a222f9ca1e058e8c016033. 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/QZZEB2411183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedddf847988103b5346dc12e19a5df2062cb4f412e73cd4e9c18ffc003324b30. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMFME2541994.