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 0xcf2e97b95d9b570ddcc9ed28d8a8f48bf749c1365a7ab107418b7b60e5e71f52. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe4ed8e2-1066-44f9-92de-9f006062a5f2.json and https://artists.proofprofile.net/proofs/artist/fe4ed8e2-1066-44f9-92de-9f006062a5f2.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 0xab516c4ea57a89bf9d1c65bbaa9ebac9062847154acf9ec59bd95172b8e5180c. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:33:37Z), 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/QM2PV1509259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2343c6c3a924af11f2cc1e0a077f3c5b495d3aba610f52d8fccc069fb5b85b8a. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QMPKX1650362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66797b5a10327673dc3ba4bfe15eeced0f0372c6d244c7def15a900fd5b57e2. 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/QZ4JJ1619864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0423857acde8a93d97c6f48846705f4d26c4923f58ca786b118ba52fe5bc7bab. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZANL1719322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd413a59f9a6bbebcb9b903aa91465379c41201efb6ae43e0a943cf97a16b60e1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZB4J1814747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51555174ed9912abd7503d0832c78b5fc6c7b7b106431971a445618291e053c4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/UST8K1819292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfae266942effce412ccfe67dc5cff5725010a7bf3c6e070aae984ccc0d931a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZES51959525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a4a881f9f3137348a1e12064020db509d2a71f4161b51ffe4d04abf2a88def. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ21986884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1e202910633d9309bc8854169832bb26d6c3a96f45bf7d17b0523c391db4c2. 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/QZES81939298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfae266942effce412ccfe67dc5cff5725010a7bf3c6e070aae984ccc0d931a. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZES51959525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9da302c6ae82f1a63b79d17845b909e2b9c254cd707581e800559b20b8a095c. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZFYZ1981825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a757aa7838ed24a4cb48224e8c528453b2b1b25f3b6bad9f2782b85ec9ff52d. 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/QZHNA2069915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beeedd10574a295de6c86e13a6368276f21ea30d3e99defbde5cc3f922e2825. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6N2046196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c66fb5884b516ef70b5399c8b7444534ccc3ab75750a0506c4e91033e5a4fb2. 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/QZFZ72243272.