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 0x1130c9df8f9fbdfe90a0b6c78768156934e360d83e1f94f365e3c2c1e5f417d5. 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/908b7e66-c0b4-4297-b8e3-9b5a831f023a.json and https://artists.proofprofile.net/proofs/artist/908b7e66-c0b4-4297-b8e3-9b5a831f023a.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 0x4d23f06dcbcd506b67d8355eda5e1aad5f18bdb1c74e789a6ae31d6ab7c40f3b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:50:31Z), 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/USA2P1330357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311d5949ce9d275f338dd80caae2ee0d93d86bcf70fa602b4fe0a1f9ed5124f2. 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/USCGJ1439825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc366134b685dedc6e910d99873353066c45a07368a79d1c971b6a2470600e71a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:58:45Z), 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/QMGB71500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6386156258429b1dff396c5a9f2b7fb6f176fafa2504ddd3b5fd65f462e5012d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:03:47Z), 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/USE830974396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a67323f080836092829e7ea62598155da6b1c536057a98eee329b8f078255d3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZ4JJ1643964.
Another Brick in the Wall, Pt. 2 (In Major)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d18bc6a8760d7ede94e538cb764b3a67f9f49a0d2e6ebd86cb83a633102fa3f. 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/QZFZ42014005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1324153a1dc7d486cd9b92ea68d44a8af75f99b628ec2b943a1dabd9c5594a6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWX2104337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1538eeb1f58e74bdaca2509eaf16b7cbfc09ff4bdc24c239a3e49bcbc4e5995c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZK6J2202022.