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 0x93762a4669db1f71ac54ee03df5f87bfe2e2a8473debddd7a05bd2e30bc92aa4. 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/7a6a7507-88ad-40d7-9b05-10f15990aff9.json and https://artists.proofprofile.net/proofs/artist/7a6a7507-88ad-40d7-9b05-10f15990aff9.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 0x65e7aad315481aec3b2f85c16a0a606a327a69ad8282eba27a713c9fcbdac2fd. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/INH102213409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57942ff888cc7ef984de28084b92767bd0c4b4408c56d2e5996b2320e998c338. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/INH102213411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dbd7c07fe97337b74079fd3ce29a7c34d7c30f7e570a4ae034f2edd68bff53. 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/INH102213415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f660b75762e9bdc0914779feb23fd151dc4b2692733436610abc9932fee9a55. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/INH102213414.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1b63e098ea18d791895da435e968cb84d55387fed92790d80d5556d1839fb2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/INA092307154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd835a6bef22488ee5c3168c861d038830c4b8f45c329082d342f8d7ba322ec40. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/INA092307162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de7a37b4a661d4c036637898d1c1cd95bb326dd353781de1a49f36f9bca861d. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/INA092407205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e7aad315481aec3b2f85c16a0a606a327a69ad8282eba27a713c9fcbdac2fd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/INH102213409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0458fc02d39110012e13ac09f229ee92601283fc2dd46af46fb8c38270db1ae1. 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/INH102213412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57942ff888cc7ef984de28084b92767bd0c4b4408c56d2e5996b2320e998c338. 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/INH102213411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09086f7684b93dea88987b6009843737a206aa7aa054e6bbfa35117f59eaa2f7. 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/INH102213410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c286dae4455e8d9b3cc645626c2215b4aab7c88623a90075be52d02fc35b71. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/INH102213417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63ced95c58a2a1c9abefe61226b68d7b64000a00f8b54e558e58d3a0af49e84. 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/INH102213416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dbd7c07fe97337b74079fd3ce29a7c34d7c30f7e570a4ae034f2edd68bff53. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/INH102213415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f660b75762e9bdc0914779feb23fd151dc4b2692733436610abc9932fee9a55. 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/INH102213414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0975e8ed1bf8005448112f12feb3b8e715acdf16eb4eb3c9b8e18b82e71f7a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/INH102213413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca7868f6555f386dbeac7d82618b3381881ca17ab503c18e07012b52578df73. 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/INH102213420.