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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 0x867c4903f66c1c42c9018e684f4d2a347d81b84c7358cd8a712777eb62e1d147. 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/9950e28d-af95-4c25-9ce4-43546e975eb0.json and https://artists.proofprofile.net/proofs/artist/9950e28d-af95-4c25-9ce4-43546e975eb0.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 0x9accc30b08f323984c67c4956a184272ac21b700e1adbfd543b669d3fec4a6cf. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/GBSMU2776270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f204fc2d3c6e3d9ce5534d2457da498d84d78e4fcbf46c02f970abebb0fb877. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/CA5KR1535048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a97820c7a3fa225b5a47895bf2c0ae8d06c79ae2ebe66530945f01daad04094. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CA5KR1535787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7610adffee61bc691e56a644cd69506f86ac25a75fd0adbc9b06f0474d315fe. 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/TCADO1898536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941f16807bc4495b86d2dabcb6128a5a50f731dc98bad5d8c53e1e2b5cfc8953. 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/TCAEB1904374.
Dancing Machine (DJ Vartan & Techcrasher Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c77218260dfb4729f8850e4c64dcd42224a6f9371d56d6f9621487f4d50a0e. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZS632106757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45c4addfbf8c93a7ef93b77dca3a6b69745229aa8723397c92851952d0634b7. 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/GBPQS2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93301ed53ab21fd601db2731f1290d822c8e4c0fdd48b82b778c6d3acdc2c864. 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/GBPQS2200042.
Hot Steppin' (feat. Amy Miyú) [Kevin McKay Edit]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbb34a67ac52d4b52b2923841f1981beb16c53c7e1681516d705a763e9157f2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBPQS2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91ae8fda2b08e82184e5b37155aff913e41c3e4e7aa600dc8b3b1aa6d55df00. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GBPQS2300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caf58bc82fd60bf51fe008875417a6a2bd701edccccd89156abd8ea8c3064c6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NL8RL2401719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62e940b54d82d4d0a732069a2d59dd254fb78643215b0bacb019ad8b94ef994. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/GBPQS2400223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f7733399bf7d0ff734b73126d71123c2beba632f354874c2e51218f03b0981. 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/USNRS2443731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18cfccda22dc960652b69793fbcab15cfee83698da1f4733f807048e21fd1bc. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/GBLV62418164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb3634481b5c587a2dfa90c4be52bba0369050d91410c063288803c1aa4cf8f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBJAJ2500963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16be0f6c103c1ae6f9d47dc53d43b9d5ecc923d997f6069379ac5ce8d5816fe. 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/GBPQS2400224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50082ab8ccb9f300ae1c58aac50c2c49af024b953725d4226662bf2a8437f51c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEY472087992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d20c36e7a08033081ab057a9b3ea6f59e6e95c4fcec06e8147b7f0a143441c. 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/GBKQU2255382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8045c6fae9e2e5b5ec33fb8f59e1561958b9d2c686514d089514d46ce8ab1e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2351460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee4dc1c68f9efce5442e58ddd4c062a551e75fb79e379cf631b180d9a956658. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USLZJ2201013.