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 0x9dceebd3df47763985333d9fffde0ffbeaf781106b6a2c8fa2e3498cb5a39e7f. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6407c90-b85a-4f5a-8dbf-e9b7b7b5ae00.json and https://artists.proofprofile.net/proofs/artist/f6407c90-b85a-4f5a-8dbf-e9b7b7b5ae00.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 0x03027a0e24edd6263bbf5d0a43479fa3e0abe25c4b833f14a13ce1164f93ea58. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:42:56Z), 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/USDXS1805235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca31998762202831673dea765a1c349b0be39cd111a2016e461607261929a085. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:21:08Z), 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/USDXS1805230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03c9a07f54a9c72fb14a38beedf9ef79fdba94a5960b91ee780d2c0b40e5253. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/USDXS1805254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4889cc1b7f19ebd24ce5d69bc47bfa4d44f5297acd7401a208764344d29fdc0f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:20:41Z), 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/USDXS1805245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101e8df6feb0916c5bbc38f7abf995c8b4b5497fc84b86bf5bb48c14835039c2. 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/USA371254781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b4d19790bd66eed7077a318762adeaa63a5966330259c2313f5389d112b45a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGD2279057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fd5472d79f6959af9e71497a79d08ee4284585adc6738d0cb24de952eabc7d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAGD2279112.