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 0x134d94d1ac4ce68991462416159249abbb446a5e93f647430eb5245faf95bbea. 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/bd85cc12-62f1-41a2-8544-8dfb81694a44.json and https://artists.proofprofile.net/proofs/artist/bd85cc12-62f1-41a2-8544-8dfb81694a44.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 0x6696e752b51e4534fc987c67aed7d656e86420d208c22f148fe295b84545a574. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZTL92297276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924f750d2d95f4811545a2d87fceb590e01225f9de50b9441f788798c1eef639. 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/QZLBC2201717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3107d6ad563e1978b405decc0eea5d7e7d95dc004bea5169fc0a8ddc6e0525c2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZLBC2200524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4754cc9308bef07f8da840cdb4885387c3ce911d367a31600a7ce0b44862f11. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZLBC2201716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b331df9e38c4c92f2ae531300cc71b1e4127fd98664203ec4d4d56cb317348. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZLBC2201718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2150ff3ce4ced63e6b02bec21637292cde03e419a5d4aa1c41c5225f0778e5. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZLBC2200729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85830e5f270d76a10b08418422cc1c6e97b5659567049df0ca857c135b71236. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZLBC2201721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd804ac022d896fda3d1e2dacb6e08f470e71389087a66ce378a4677991da07af. 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/QZLBC2310150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014ef1008f3a09f39776e94f4acb6159c81690fd9094d18849304b5f9a32235c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZLBC2314411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36caaea61da1956d3ae3d9ac55ded10eac83f019a79611ec636724917c0fc619. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:41:04Z), 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/QZSYP2370269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679440fce8e7261a2ca6e27077c5783e37b9eee948f511c73e8173587f63a5c9. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T12:00:50Z), 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/QZTLA2413037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5608fa40fbae68d148c2944499125c3c424f7d38a0ac6e392dfbe3334dc39a18. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZQAY2443191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf828615d81311809ce12f170f8c591d863d94c034592da9c658d317031d45f6. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:02:23Z), 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/QZTLA2425316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a5b3ac331ab83eeeef45ee4013278a8770daa08067bf7f2dbb38489cb2d39d. 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/QZTLA2440777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb25d4eff0dac433c8a0ee3cf0831a874f39c9da240d07987390fb74682256b0. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZS7J2574600.