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 0xaafcc3388489f2f3ba0404f336620134badc841bf132936d5be42b9a6e013e28. 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/c5179c32-c160-4e6c-96b4-217d383238a0.json and https://artists.proofprofile.net/proofs/artist/c5179c32-c160-4e6c-96b4-217d383238a0.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 0x564f38c97aa7ef1f57ba400efc91d0fdfb7c82201e85cff32b7b408bfd0c0b8d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GB2AF0900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c42ed9cf84744c27d6283ea72dbb851334a96d2a810be34082ebea95eabbfe. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GB2AF0900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a1dfa3d37ab0be31176b0f532acec413e68552d0ea88d476e08da93d23d06b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/GB2AF0900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5467d634f793f0545f1b78265f7f3717f58863e8fd496f06ed727dadd6a0442b. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/DEF270117306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81093a2a238c4d259c9217968bd66796807d29e50a28827feffe7c46464d0223. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB2AF0900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be2b9d8a8f5152e11edc35dece1c25c922fef98c04085fc4dc4305ad85b4815. 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/GB2AF1100005.
Post Traumatic Son - Marcel Dettmann Mixes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf015108aef5bb50a16849525a8958ce571772e5e273e0bcbdafdcc009922206e. 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/GB2AF2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a9767e32a6b9c6ab850d4c2d1310e9c030627e510d4631f6083422f906c8e0. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GB2AF2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994358848707dfdfaed129d5a4c0f66871a44988ac051515ad4c0b000ce116a8. 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/GB2AF2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf41d43c7efb881f8d2a7691d23fc9f29d2dd76500e20c57a5a28a0f1875661. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEF272133020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7872344f47f4966ad44dd283e861d533440f16f7f310226bd2a9e392231c6d7. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/DEG931000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d68858e4dce3c93ec518a8533cecd39ce55b9c0a5faa5280a8df5ec290ff09f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBEXH2100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18721577acfe304e0bcfb0b12b61f8be26d44782a7d46eb8d9a9b3b297d2500. 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/GB2AF1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece0b23c20b6417e9918df446140153c8eae9ebbcc46f1bb2b49cb8a605d76f4. 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/GB2AF1600011.