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 0x63d076af3115c94666477973fa817d8097a6d10fe9985e1fb1ad165b9a061a5c. 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/642d998a-12eb-4d34-b9b7-56c286230d92.json and https://artists.proofprofile.net/proofs/artist/642d998a-12eb-4d34-b9b7-56c286230d92.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 0xa5cd2fbae56ae8b4b5200cdb2908eaca0b91bb8e5ef289e89026afe926684a10. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE6A92367240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858a16c1257681b4d068da0403d9ced6af820fe3f606cdfbdb2edc410acd9063. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USZXT2352388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b38e6fa3c9f035814cfd8d1fa63d0235dfcd0ea543aee4232471997025ccef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6QE2394700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa162d946d35fcfaace4d6e91ee52e6b63e543ab00378781754b9373b2e3a10fe. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE6TI2380300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d5444e365a415d4d24f17d9cfac70e5c07e14f62ff124740af70b80656f225. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XW2356893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013cea9a39dfaa42ba2d44fb185be2c0ad29111f6548c8d23508ff922ea5d1b6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6XW2384141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699f4a59f268eb45ae83f7044f216b0dd4f1039feef3d9684c05fcc11d6da0f1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6QE2396786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5430bcad13077a9f3a3b7261fc11659f4279f47ed8f5607d1a4c79030bf7f0af. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6I32397464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f2748442eb92a160da6d1ac9cbd592197cc52ef6d548c2b7df15f586a974a2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5752310589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac822c03c9782d62d1ac99a1376e2afdd7c74ce56ed9ae9518732af3b5d615d1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5BU2399819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaa99d5743f9e6cacd08fbafaedcb20f0dba6d83ffd587105d6fb4fbcdc3569. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5752301124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0439ad53223fb5a82b35fde781834f9cb71b4252692babdb470b4624a23f9abb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5BU2383524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b282601ef7d47d37162f07874e75fe89f62e603040ce1148eb97a0cf09ef89. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5BU2338113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb61a1b1ad6a1f8c30bd1fd6dcccad44501a7d7e403318216c03162b51bd3b5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE66N2274544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afc88ab2638dfd40f5fa64a9048e4f0a4dd6ff37d5db9599455a15138a83e41. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE66N2274540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aac826a19d3b198b59e2992dbdcdff1def97a8984d1aa69084339eb34e91f45. 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/SE66N2274542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86e188018a138455406094209460fe2be2b5cf29a8e904e68e98a3cddee94ec. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE66N2274541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2620e7999e68c2e525e07fac57ecbe6c1431c8fa243bc295868755b8edc2fea7. 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/SE66N2274543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a850e258d5da0a93b4725c7a06f448e20fa677421518d5e55c1aac3749d6ec. 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/SE62M2249546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb8954b19b9c58e1eef257ab50eb9493ff9c60873e979e4a7f65e9eb577cf19. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6XY2246434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4511a37e2e878c4555540c0f28908d952311a7af227b94502bc3f6bdfb328c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6XY2241913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bd01ce0a0b923e809838644c9c70b811f8abd837249ef8318f0dffde90ade8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6XX2266762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91973a18d3941a48cbbb403cd24190336b6e0999f583b07487ce84e991d4386b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE6QE2252279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba04159579f4145d1e7a84510b45cec8ba3fb4b447eea4d1e5f3a81f269560c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2DY2200625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dcc85476ff4ce6fa33d2c62149743e37d8c4411f306bb8031faecbdbd58a11. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5752223471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b05b69b80c7889533c2f8781fa126c940bddc3eb69d28df23555bae5013c96. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6XY2151731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2a44608997b30dc43ff4fa2fc6de89beba068d0ea06f68033b7f20e78ed808. 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/SE6XX2184680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6583a14eb9c1c6c73a231c8d0e8239f0a8fffc9a2b0856454804025dc09f3f6f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL4NL2147684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7e39849dfa832336bed6b2da8501198f7d0545279b9d65546fd6b91f7ecc19. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5BU2430764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c806a13f09b368afcd1acf64bea4c93ae4efdeaa79094d400b12ef527d660ee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5752480524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f53d5179644db6fe882e17ef58abee25ab30a81acb40c69ab48fdc0dff39de. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5752411674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe31d7d303cb6f4bf2aeb3f64f31e387588720bbf98f8f02bc7bdfbb2298198. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5BU2463933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc5615bd20c6efadf978e532586a92ea017db9e2e7d2701cff3320054b956d0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5752494646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42908a44aa512fa44782f90f3675dcfb938052f2dcc247cf18d799ce3cba326. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5752446996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7e9b9ecb1929179847fb8da31f9204c486af57d2710dd9fa6612086acd4d6f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE5752423708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dd64b42fbbc9e94f06f1b0dc2e16ff9f93bbd74af4e0ca5971ee2abfea6014. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE66N2214924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f8d6702e326f0f37223be23b8f47f43f87309d29ea8a30b0d59689791fe2f3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE66N2214912.