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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a165066990ae4961a635eccca85ae5c5c6cefa27360ec895acfee3ce0734cf. 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/62d625bd-1532-4a3c-8554-473ce2d0e33f.json and https://artists.proofprofile.net/proofs/artist/62d625bd-1532-4a3c-8554-473ce2d0e33f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711c6d8cf2944e19a6b238c6c8325be7c3bb52c0e180ac16d46a75486334cba6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DESV91933502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b85e655c8733cfc57e8f90abef9406aaff7955ec5e4afdb913703dfbb29d1ec. 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/DESV91933503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b753cd0c2ece17c41835be379889b3b49431de34496dfd01c3bdcefe2db2c5. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/DESV91933504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43c0f852e080f7553630bac25c86ed849069826a6c898fd2a0bf7b10da1ec1e. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DESV91933505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a34bb13e39e971ff86de564919dad7a146f28cb42928c4fb953338ef7f87c56. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DESV91933506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0b0fd87ce38da602c3988cc46b4f86ea36ed53094d1abc5eeda0c36a063a44. 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/DESV91933507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1371d9033b8167ee999196112429e50ce1970704bf2b1b9a939795291060f0. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/DESV91933508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9606aca2a86b03a49a9d2f2a511b0ddd75839414714cb734470d49af3be8374. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DESV92333801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e163993e0bbcf1bce8d0ba09deb776a5186fcdad6aee71ecaec134d915fadd2. 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/DESV92333803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b6ebb2e9e754a9ef78bceeac5bdfd887f4449b599f37b65152d75dd701cdc0. 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/DESV92333804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cb3477fa64481324f15620e03e213b57c1234cf4b45b8e10fdfec8b3e9c449. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DESV92333805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bd672b5f60835e8e68d9f6659b64be7accf34845105484deebce3e3ddf9e19. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/DESV92333807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378e7e18aa10223bf538e435eabbe93ed83702a6aad8cbe36961bf11ab923e87. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/DESV92333808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb3bbabdea885109180deb23a5f9b323b6f0c454babcc608a19eb1584f7f507. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZC62337050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03496d4bda3b34c846037f3973a931e5149730f13ec00b63e82d629a84a51d7d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DESV91833407.