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 0x3c0547aa3886571f4260f4f9e1242ecd73fdb27baea3f4ce293114e74753bf94. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e1d3763-5be7-439a-ab77-ac0ea74acd23.json and https://artists.proofprofile.net/proofs/artist/9e1d3763-5be7-439a-ab77-ac0ea74acd23.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 0x7f2a33fc671c3f50b0d3a1b97a1ac5a32ef4bc6f5a4529d3da015a8d41d2abe9. 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/QZPLS2152436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35e22c16e7db1b2ff339dcabbfb9fb4a294631d00e51032cc612103e3919490. 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/QZPLS2152438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbcf258379950695c292d93fc9ba0d0b6b4681f3ac9f803cb5a6f3ff3255d3d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPLS2152439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf697a57e2b6a62c72e8f7633991b74aafb97344295e69e7e766a714f0c558aed. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZPLS2152441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344c5b2bfee5e965bdbd08b95b542efe632b43a76e4e72fc209def1e79bc5f82. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:43:36Z), 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/QZPLS2152442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58ffa6880726a535510055fffaf70b3ecd4dff0806db13899c5265c438bf612. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/QZMEM2362469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbcd4013b62a0dd7a2c278206dfb35e014dbd26c045b57a55f42335cbafdcc0. 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/QZWFE2327537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1169eec927355d8dccbe025f5983de15cc12ca552280d2990e25a2dd50e0ed. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:57:07Z), 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/QZK6N2526441.