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 0x35a26024f56fda3086410941f5a46ba50d211f001c4107587fd7a3ee34568151. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/407a6417-3f72-4849-9349-6050001590cd.json and https://artists.proofprofile.net/proofs/artist/407a6417-3f72-4849-9349-6050001590cd.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 0x8378fe6cdb8b8b6470e186379ccfbc93e1fe644c04e42f51100c1a4fbdd3e69a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAFU2130203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fb7a62f88668dca820a6f1922db2fc607f731b85e38e6a7db9a3067f079ecb. 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/TCAFU2130209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4f38e6feb258ec5f8141d81acb92bd2d99a54e9ca22349827aeb6e2de8a5f9. 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/TCAFU2130211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2441603e4c14f23fe2df4b82a5eb494282674176b6b966160b60a50f84b6845f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAFU2130213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae13bfc5e3599d01908efbc1af27f8921afb0cf1d00179ebb35740201a90b03c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:41:58Z), 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/TCAFU2130224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e0bfa7414bf3f14121277518ee2f96f88f4e59001b96f2a426ddef48fcf885. 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/TCAFU2130521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d70028cdc8c2127f8d03ba9b2068bc12bef798b387104e6675d8b1f9f8ac268. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:30Z), 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/TCAFU2130486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36395663326a250b0462cb9319caab64072cd85c5da80e25c120d2aac142aae. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAFU2130495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c60f947d98b1ae113ebcb92f9b677510d616a4576971a1ebf7bb71aac6c0850. 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/TCAFU2130550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3ae076aa2c607f6ca69e42f8dc47c3553b2d5649f65167ed9eaddd032f840b. 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/FRX452362311.