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 0x7242230d89e1677519f6bedd2b0a9adfed3cb2aa813e81296099880402b6b90c. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/321f9447-ee62-4474-9eb1-60e0a56ef1f0.json and https://artists.proofprofile.net/proofs/artist/321f9447-ee62-4474-9eb1-60e0a56ef1f0.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 0x7947c12246b91fef0842c98265afb486c00bb464ec1b3e5ac78d6710fa9ed723. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/KRMIM2031656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41fcbb43f8cd8a562a9abc813f256dc4299fed5343a42aeb3443d6fab71f12b. 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/KRMIM2031657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddbff77f7a3be6be7340cf2e2a19122431c64839ec2f49ae3b281a722721279. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/KRMIM2031658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd52896b3cf5135a81954ea76775e992031496b784e277c613a7c420ecb24ff. 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/KRMIM2031659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26ff6d8a0e863e4f7005b46b7c74821f040a21be12c0be4c2da35c368ba77c3. 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/KRMIM2031662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad039da858292bc824d7a70c28cea8120e195bc9fce91e74fc7b455b71e70332. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/KRMIM2031663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d9031ec651431379f9de6e8ba8cd9577abef7872f6e4e21d87a00fe6ab264d. 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/KRMIM2142664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ada145f75371b9adc007758ce7b61cf7c91de16c09b6fd74373b457611b2dbb. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/KRMIM2142665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9354645bec4fbf015a309dd8d6e1ec805f03061013014445cc03141d3150d2. 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/KRMIM2142666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e493bd95cbeea9e9d4011c03c12f467027b81bab9a3cc7d403de52dff8f4596. 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/KRNAR2234784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8bd6c2ec33303f5e8ba713c6c7d0bd846b9821fb3f6869fa3504f9fb0e2265. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/KSB022580114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ead2e46059a53c37f1d3aa7f1d7b65a293907a693ed3cad375a2b504bcabcca. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/KSB022580131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85601fbd975fb496a9a1d2c0e4ff78c67f279bcf161d178cb5cc45a704a5ef1. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/KSB022580132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c72082602f44a97cf649eac9fbc113c1d353ee5d688708dff8154fc42de281. 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/KSB022580133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc6e126acf3c6e57e1c23827afe7a770c59386afa29866175feda19d19bdc02. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRMIM2011454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d1bf122af70090f9b194e2d7c1e57985001bcba98e3f9c4dbab36a12c4ac5c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRA382400389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8a1bb694a1097114c2a799fd05e5767d0dbf8f7f8c46326de710126d209604. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRA382162786.