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 0x38921fd013c70aeee40debd8488d0ab5f2578fee3ff0439da4c3da1949d245c4. 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/3884cc3c-173c-475f-bae9-775e106b609c.json and https://artists.proofprofile.net/proofs/artist/3884cc3c-173c-475f-bae9-775e106b609c.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 0x119d0ac43aab97d9e84742593d65f2a70207d5093f045137932738471eb0ce77. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFR2133139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73decfafa73fcf28a392e280793c62b8dda79ed4d6486df896f21746c2f3a120. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFR2133140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a571c34749cf470129576567ae83be09749e6ea462a66a90598b8409186aa0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAFR2133153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7046d5f3489990e0f9036af2eba8ce90e361e681bcaadff71d18dcd5a280a2eb. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:25:38Z), 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/TCADW1813236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85091ae3e9efa5b298e1fb4250f716ea5e01c8a55316caabb7b70676976d19c0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFE2025079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0c445c2aa8a76b16af40289a81851347252562e8808e6cc464ad7a606939a6. 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/TCAFE2035899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86d2f2b360d9e56589d8ec1495d12431f4d6134967b907db9a3701f6188a1f7. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TCAFQ2135439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7801dfaee19748537f678f77805347f80ff8fe4a5b139ce4024d7cb61889ce63. 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/TCAFR2121898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ed87be59437a4c6b69ea12e518475e6cd95d50c22cc1d0ca538022142bbbb0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAFR2121913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7172f19e97638905bb69cacbc06d429051fd6473eaedd5bd86149fd0dd888a01. 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/TCAFR2121918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6f923e970aa7e5ff4956dd8525c1b441393ac4e360db06bd6b311d9a298934. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFR2121934.