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 0xf555154c1af9e9d84b086b5bb4639ffd918fe15df06f40c16cde0eb09b040b5d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a5e0bbc-f24a-4a59-9bec-e6412af56ffd.json and https://artists.proofprofile.net/proofs/artist/9a5e0bbc-f24a-4a59-9bec-e6412af56ffd.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 0xc37b4e69d4a4baa9c688c111b11f9d1b144f0a7b9ba4267abc92a0be187e6405. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/TCAHC2382490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c34f3d58408848a75792b11f97910d2ed6594fe4363071641375da77f3e19fc. 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/TCAHE2304522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5879be1794fe4402a0a2ce5557919779690efaa58dea1292cc38bd724a0a8e50. 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/TCAHE2304380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56743a2d9dcab2d2490fba618421ec9ae48dbead2da3ba46ebe6aee2f473314. 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/TCAHB2371953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4906ed362c0cad8ce8d2cbd144bb7c0321ec1d53122ab6e2d8a9a856d1904167. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAHE2304497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c474f4c593087384ce2e87bd18dcbe623ab94bb33dbcf66b30d4bf00bfe6ece. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:42:06Z), 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/TCAHE2304449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab87f6e771b8497d250914d1c5e588e45243011c055fe58e77aa34b1f3031be. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAHE2304404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780c40909bf1e4cf3527f903b9c4a95aaaa6db81969a0e3d4f46bfa56bad2612. 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/TCAHS2325353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa7ef31d964c01b4bbcec483066ee15df680922a042d77d9fcf815289a5c1a1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAHU2494841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bf64c2874a4d4dcc954d3a7f9afdf308db040647e5e318ab0b994f9a6554a2. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:28:24Z), 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/TCAIC2423724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f29e312224b7bbd6f97dff6b8f488cefdd662e6d8915e97fd4c037cdf5f5bf0. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCAIO2461475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bf64c2874a4d4dcc954d3a7f9afdf308db040647e5e318ab0b994f9a6554a2. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIC2423724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f29e312224b7bbd6f97dff6b8f488cefdd662e6d8915e97fd4c037cdf5f5bf0. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIO2461475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780c40909bf1e4cf3527f903b9c4a95aaaa6db81969a0e3d4f46bfa56bad2612. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAHS2325353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa7ef31d964c01b4bbcec483066ee15df680922a042d77d9fcf815289a5c1a1. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHU2494841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf6f38c48038ba3a25734108ae3bc9dc1064e1fb117fcef3156a5f41aa08896. 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/TCAHU2464113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f84060c584fd50b08820528b094a6760a2edf2c13bca427c91b683e6e861da. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/TCAJH2580584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f3272f776eab45a68e44e10c4410b0898f1c6d08bb01983425408e2b1dbaaf. 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/TCAJH2580456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062a3e7b32adcb267c7dc552ec631eac585b0faead82838f5e2904607aaee0d4. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/TCAJH2580597.