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 0xdaa8467db83de46e16c7b1d052c03788d57f1149544f8b1c9c38ec9fab616815. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b300ef29-d503-4b48-8d6a-37f5ba46211f.json and https://artists.proofprofile.net/proofs/artist/b300ef29-d503-4b48-8d6a-37f5ba46211f.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 0xc28d4126f776380dbc417e3ec2453c4a9b2fa0e1fe4243bb88909fe59f895b54. 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/QZMEQ2499358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b58dceebba793b2f5d6036abcb0ecf7b370ea09601e4ec100e509e639e2bd0a. 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/QZTBA2483615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749e43361fd231caa776b32b5f39f4dcf50cb2a2a3c608c8916ccea6dff49403. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZWFN2484539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb70c8ea5d8e8e55206737aae07b1cd74a57aaf1e586cd9cd509e930dceff2bb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFN2484540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee310221496d251a46ba576aed690b36e387bd88eb39117bc0ae334816ca473. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFN2484541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad29d73e14fa22e9ab9cbfd0877ca5b7d3c810f8a57d57219ce16547fb83dbee. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZWFN2484542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e3bd477715e6899d252cc5f090749a4abba0011a15ec69cb51bf48da02c9ab. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:01:45Z), 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/QZWFN2484543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6672bcaf1375cd6e4d8218b611a2a31996553fe4556fba200c4b433965d213. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZZ7P2470376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82efe431d3dc35319fd752cf01cd81c2f4ea94f8d1535b018b61e684f9da7c3a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN42591962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e03930cc2ecca812e91684963d3cc0a0a51d68e5b380ebf60e8bf8881c5d7c8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN42591963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344f0a500fb0ad8b83f409eb356f728d92af91aab182eb84eaeb428efc4e7c94. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN42591964.