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 0x93aa3bcaf39aee9296cdca1a39a648cbc496be78ea1ebd0ed7a081a6d5e572ba. 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/b7e14287-5462-46c7-8083-f0b663fe441c.json and https://artists.proofprofile.net/proofs/artist/b7e14287-5462-46c7-8083-f0b663fe441c.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 0x4a27efa2f6e3ff758f4b18ea53b642003fe720d314e8dd6b51986487f0b3a889. 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/USHM91633753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97b7bd540cd46cf5ef020ab24cb7b5c81169c569cee2c0c040de2aeb11ae67f. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USHM91633757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89431e04bfe8b2e31efdcb05c3da58213a522fef4fac61cf052f9ce09125286c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCADU1896767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bc7302a1908afeb1f7dc53c8922ff2db373e144837cb358461e07131a4c186. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TCAEW2012196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285fcbd37f89507df502f2fe3fb52e4bad42d2e3dbeb46805e536a66760639eb. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAEW2012204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09896dd86993f300754d703fd6dd31eaa34047c6f2dabd0c145864b9ce72f917. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAIB2440182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6453ef0f2e515a70ef8ca894f10dce389ff4223375780674e1394ec6cb4e376d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHU2480806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe987c608d854ba46eb1f703b6318081ce3f54826a21d5c128dd7a9865d53fc73. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:22Z), 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/TCAIB2440328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93058b5b0c6eeaf6ad1073ec3aab16d87cb827c69447eeb9964d17ac5d80109. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AUBEC2335488.