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 0x008392dc1bfd4adb2c6390350fb267e4dac07d3057708ae3e84039a1ad914f7f. 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/df0c2595-dda8-487d-a009-808bc3c9f9f8.json and https://artists.proofprofile.net/proofs/artist/df0c2595-dda8-487d-a009-808bc3c9f9f8.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 0xaaebbad40e753e037ea96b9e1de2f3f7114e94e8039d45dc8e6396e593508d8c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:10:46Z), 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/FR2X42087308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaebbad40e753e037ea96b9e1de2f3f7114e94e8039d45dc8e6396e593508d8c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:08:29Z), 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/FR2X42087308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43402743fe863e26847910b9e4b1630466b07a90b0eecf7202928dde38923af9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR59R2071909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ddc2d54a72ddce3ea8ff58759360d24c13563662b21261579e8ab4986f61ae. 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/TRA162200298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0769e7a9beca4eaa365327e7dc44b85e4b1cf65c2221187c42d7281e985133. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TRA162300436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6baa2c0d2c3c1a583ccd9d5f9ff37acd6678e9aca256f639bc58a14c2dfa97fc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TRA162300437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc45870c68cd7918fc8862fbe893085ef5b4b5ac28f7726210e7688798c938e4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TRA162300438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c344098477b1dfb62cb03a751eb57de0af42dc94c62867296fd727203a33e74. 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/USA2P2354995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaeb8ef2195626103e141f3ef5ed8608f26ac9f486cfd5f9305f0c40cb05cb0c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:28:30Z), 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/QZGLS2535534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe827f1ab4a0d667ad6faedaa95a2d2577914816dfc40083d738b9571e6a45505. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TRAKY2100006.