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 0xdd05f40c4b1203eb06c56b722a41363de7e0fd9d37d155f1a560ad32bdcdb6c0. 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/67e7a0ea-59d6-4e0a-9da2-074c85c93214.json and https://artists.proofprofile.net/proofs/artist/67e7a0ea-59d6-4e0a-9da2-074c85c93214.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 0x0d3bba314d6ec41cfc6059913a20d73c3f6cb337b6462ca351766fbe5062e920. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGJ2157736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e819d8ab118972a5cb656ff6f77d3f2c1aa8379ccca2fc3d02a13284de65f7. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USCGJ2256209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d315aae14ca049fb2d46e0a4543050c99f3705ef02b8777d7c16f043d32f0e. 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/USHM82431843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0596707f9edbda1c9d669fdb9d88da03ec39021bf589accb78888ef05586943. 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/USHM92406337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25adb7de2bfcaeca4972ae8bb25a1d8e8ec11eeda78d67c309cd86556d17357a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM92428061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d315aae14ca049fb2d46e0a4543050c99f3705ef02b8777d7c16f043d32f0e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM82431843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0596707f9edbda1c9d669fdb9d88da03ec39021bf589accb78888ef05586943. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM92406337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f80ebe1d8fd445b798c87f898d4854341d37fab4710909bc8fe2bedf6167d6. 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/USHM92428064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd393cefb5d0ed06ae4b145580326c9b50959ab7df4c18504371952063746e8a. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/USHM92428066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2fa6869604ee1d72c7001e76d946dd0fa8836c268bd7b141afc3fb3b405236. 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/USHM92428068.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4d6eef695d90a78cce5094ca15b77963cde7047a5027f84eeece6faf48f533. 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/QZWFR2416521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cfea3b93c05eb76ead4b0a5499a562cdf7f8d7a784955fad7cae1384216a9d. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZWFR2416523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e4972c7fda0125bc4251d4782879c080f5290aa6ab7225d49e0f6016ea52a6. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:05:17Z), 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/QZWFR2416524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25adb7de2bfcaeca4972ae8bb25a1d8e8ec11eeda78d67c309cd86556d17357a. 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/USHM92428061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c900bc38afe71020713de7b6a077a8a2983113543e9b6b0faff89bf35abc255. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/USHM92428062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5b6ff0a226124ef130d80dabd30e6d99925194bfe9c5b639bcba414f03aab1. 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/USHM92428063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f80ebe1d8fd445b798c87f898d4854341d37fab4710909bc8fe2bedf6167d6. 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/USHM92428064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd393cefb5d0ed06ae4b145580326c9b50959ab7df4c18504371952063746e8a. 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/USHM92428066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f382020116b1c2441b4b0988604cac838088b84a83b055f09d7c7523c0d9f02. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USHM92428067.