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 0xa70e496120e5a17a7401be7ce297c6301357e40e5c515ae2a07f61c2d8048128. 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/eb2f42cf-0e4d-40d4-be77-ff2dfb16f216.json and https://artists.proofprofile.net/proofs/artist/eb2f42cf-0e4d-40d4-be77-ff2dfb16f216.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 0xef64187026130c0c379e18e75204697bc6877952ed9e82465f94fbf805dd3087. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/CA5KR1923778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1394cec79cb079d3ccb1be29c1facc051577ae1c51b53ef87cdd22dce15a35f. 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/CA5KR1923784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4d02bdfa0911e9362c6b6ac897edb5abaeed351ea78c938878f8221d2bbf74. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/CA5KR1933007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd2e69e9b1d7833b789218a6e64c9c045c60b5900fe82715db68740cdeddcbc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:58:03Z), 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/CA5KR1933013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14f3bd50d6052a1fb0295b668cd3f6e0a5afac3456988f9453e0333cd666b58. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/CA5KR1933346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeca933978a9418b767cfaa1997b38b2da6b8edeb0dbdf11186192b5b0071b92. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:39:33Z), 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/CA5KR1933347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552f7b8ff89d91f91f19c470b3df249c9ff73eae2d3bda7c8a31638b95d84e99. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:33:37Z), 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/CA5KR1933348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67002e349ccd27484c9fa83ff4c170c8a6ff32ef7cd3e481a6d2a24c66eba2c3. 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/CA5KR1933350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b38b6bbceba3cfc22f37dd1e710da3cc99f1e46ac4a0d6547ae2f127c9060cd. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/CA5KR1933359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ab03f97bac5f10ef85e54c2d1e1ee9eed24d04853379b1bb685ba89edfd40e. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:00:12Z), 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/CA5KR1955044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9f06799a57369ae04664732ee29641fd3b7b748ca0ec68c22b7645eaebb660. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CA5KR1955045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31875bb0fc1e505f65834b37dfa7462b1b9657b99436daac769088fec3cee06. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:30:16Z), 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/CA5KR1955054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d2df2e6524cedd0d6e3c9c5f211461819c6a11a9e83c9f39a60c4da8af970d. 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/CA5KR2010724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4319c29844d6d34700f43e89e35a1323187b883d34d9052440a502d1515cdd. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CA5KR2010726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dbf137588ef7dd50e35849025f65565bb006ac739069fa68bb121afa6bdfac. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/CA5KR2010727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f2ccbaca725c8f923b33341afe41508239db41841bd71784af57ec7e1269c1. 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/CA5KR2010730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0671e9acde5d7ed2263f72fe6374b96e5df18dd8488cfd13cb06384cdc56d799. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CA5KR2016229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f392620f50fb108fb72320e898563ed88e91dd4321ec3738434b66b733b174. 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/CA5KR2016231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4748d7e5ac5c4947aef1c05230b63328b8ec881846a98fdd3675dcff038ddb1. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/CA5KR2016232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5a883fa1341c1028740fa3cee2b07fa9afa0e62d4f1e7a0d60b7c7baba4cab. 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/CA5KR2016234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e207a0d07054c9b840f72a18c3eb9e2c2f93b87cd78d47d6702345b9883a6d4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CA5KR2016235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5c54969dcc8f64bc8ebe2e323c64a2bf501b139d4e91c2dc4830398d82fd3e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CA5KR2016237.