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 0xaae89d0a9c7dfcedfd2905aeeb7a6ca522c06e5c2aa990ccc2aea24a55b6496e. 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/89296979-81c8-439f-92d2-3620ca94eb21.json and https://artists.proofprofile.net/proofs/artist/89296979-81c8-439f-92d2-3620ca94eb21.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 0xafa1384645fb5df68be0a9238a9c5ca48f48d8215df8244aba79d3bf338f96c9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ41981618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3651bd2ab1f0794440ef979678c8804dd05371df1ea58cf28e3140f09dc5fc0. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZRP52181847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3472d40fce2d305b2ab0093d512f89139dbd879218e940a0fd1f776ce19f736. 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/QZTAY2260324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2ec4daffcd2b64311277bc4c6ca2181cd8c3ead11dfebe3ab19f0885113353. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZMEM2301204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a7e6a49d05a8a8b856329ff02cd0c4b27351d89b86742406bc0a8256a61a10. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWH32400681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3472d40fce2d305b2ab0093d512f89139dbd879218e940a0fd1f776ce19f736. 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/QZTAY2260324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95352598aafd07a10f510ba7b70239596319d30b782f4035d95bfdbc21f8143. 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/QZHN52355765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2ec4daffcd2b64311277bc4c6ca2181cd8c3ead11dfebe3ab19f0885113353. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:19:50Z), 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/QZMEM2301204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c8456f348eb42434f4e30b169244946362c37e5f7af9dc6f57146cdc99ba48. 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/QZWH32500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c8456f348eb42434f4e30b169244946362c37e5f7af9dc6f57146cdc99ba48. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWH32500092.