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 0x52489288c9283bcbceb9ae6d6e543bd776497b780c417bc48a82e13e0ad18f67. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9db693aa-6182-4ccd-9c93-86e7b53a0ae4.json and https://artists.proofprofile.net/proofs/artist/9db693aa-6182-4ccd-9c93-86e7b53a0ae4.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 0x6d6e49144345e7f2bbebe331341129070d1cc0427a8955e4cf4fd9121d7c31eb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCADT1862961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16860bb4f383a93f0aa6d0d2b8f29b194e45a1cdb363a2f9e960c1dea3e42fb. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCADT1862964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b1915501a615fe8391a304a17637596413cda320a315765b728be9f10f2d86. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCADT1862975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d3cb2ad9aa7e3003bb942ed9e745c1f724adc9b737978b8745c7dbc76e88f4. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TCADT1862978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339b7d2f2640b12a0f437697c14150e51f8ae8c4e5cc70db06ff4163d450b531. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:45:24Z), 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/TCADT1862979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34a0440afceaead65ba2dede5ae4ae8f6070d0a86d082898701fd0fe06c071b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAEG1982193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a3694b67da1022350a285076f9e87b2be2884ee9ebcca9e19e5e0cd63178fe. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:44:11Z), 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/TCAEN1960365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d42b3075cca32c27296c9f478ebfd9f913e2287b1cc39f865edacbf887afdd. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAEN1960371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d32ae88aea9982dc8cac9752210a1ad06379812cfb386763372a672fa07e68. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:44Z), 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/QZNJV2036237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddc63ed369d7599fe83f4c5a66a2bb1cf4e5d06836394c1f92f8f7f293eaff7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHZ62295754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1982a8ed010e2ccbb3ea55df13e6ce97e94c531c004808d07debe6af3be52faf. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:08:24Z), 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/US7VG2398085.