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 0xab92845aa6fc156c948998e73daa64b81669d64754330d086f576ec4c481f8cb. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d448ae91-d094-42ac-964c-68860657640e.json and https://artists.proofprofile.net/proofs/artist/d448ae91-d094-42ac-964c-68860657640e.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 0x8f6e8edba5ec766027340aebe7b68bc61f5b064748d823519fda9ef362c90b44. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZES72159387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe613660f1c473f554400b9ac6de81a7e5bc436addded5573015edcae77ef6bf3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:47:34Z), 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/QZES72189876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9386b5658e49504a2d2a6b24a5a4739e90d26224931707b8a5ceebfe1c0eb7. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:37:46Z), 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/QZHN52107872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3201e988a29094338a21eac83767d6ede81b8b3cea22e639610db44a1c05fd. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:11:09Z), 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/QZES82193567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0443ced81c321fd2f483ff1b1d4164a3d6833cd6eef7df732aeb7eb39f28ca. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZHNB2117194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe1b5637aa2765a0d6e0582b8c7bc1a9cc7e743d8b55bc02977bf6659bf9da5. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:44:22Z), 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/QZNWR2162205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046b28774bcd6a334820443c13234b5340ac8165b578fffacedaa79036b36033. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:48:40Z), 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/QZES72159389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa726d147c98e96f8927574f90187737e50fd9304d8bf31bd9799245114ec0798. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMEP2259385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c6994d03cfa3323cb7afc6bd25ba1601eafa932cbdf28014aa121424ef6973. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:09:09Z), 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/QZMEP2259396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2913aa948bdd3b521a2bdeb8cd3de42917310c21579155bd8316680e6944b3. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:20:17Z), 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/QZZ7W2541636.