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 0x11153e541af2e0ae08b80c57f480f64a230836442171804fb4ebbeb366a28a88. Chain 2 (Bitcoin): anchored in block 953681 (2026-06-14T19:31:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6459c009-ca29-4194-bb0a-bb0a6eb7ac85.json and https://artists.proofprofile.net/proofs/artist/6459c009-ca29-4194-bb0a-bb0a6eb7ac85.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 0x8aa443a0bd7e011bc35016b762413c3478df58539eb9c2cfd01e5ee6aa0cc937. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTV32587527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113f2c98858ec0cd9a00920ea1191a0936655dad77786f8fc84d674da2231221. 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/QZWDD2514273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa407b5411ad4303da9b8d009518187bc70355007233d05cf3aee79a3d6b9a6b5. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWDD2516065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c722fe6b085b2d58fe4f5a2d1ed0d4abda38931b2b3e1d6cdc69f31cd3cef99. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZWDD2516070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588734ba44f195b3583b778f5a6cfad0f21816ba11741ba11c7de5634c5bd62c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWDD2555684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a67a16900f16cf9d246c95f8b15adac21c6a1268c285314c88b2b635af8a287. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWDE2508237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d037bdfade2d2e4f63c793ba6c500dd91f960c853095e1da5a1b0fb0d7ad64. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZWDE2500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fae1d9476718875845c6a473a96df2cc3c2fb9b4c776036de78f884188d5fe. 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/QZWDE2520339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ba4058f939289dd4b7d2df7930c1e85a57f883a2e753117c276e6bd3f14231. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZWDD2563901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff89564923e3fae90e75cb24b6cb58b508b71a8fbba14a7b134e51878fd8dc37. 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/QZWDD2565151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9f158e428f88c5964e27329dff6b3c50961077d9096b033e7c7cc2fc973f22. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWDE2544800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65786c1491d9f4dc77bfcb1e8a9eea4a197f280e2a373278d620a52961acecf. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZWDE2536908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc08762f9b297f63ea69a3f468b8e020196e6bff29cf5964373c2a9d23ae9450. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWV32529168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285f5152afeeee90ca7979eca5e3bfe99d8e39062572c2104271cafe9eea4409. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:51:19Z), 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/QZWV32539192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8721686888e83c603ed1a5d1a7767cf604dd4d8e35ab279906a1ab4d52eb71. 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/QZWV32543934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae694acaf3fc3f89bc0f31659ecabf42773c7724b06bafc47ec16ffd82225909. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWV32546571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093e388878db656862099c68599d9eb2e5a28f75604d675e7758dab57dfb585f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWV32580318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ce0e97577bb48da136daaf825e818af800bbef3d537586c7fba9589f16419a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ8A2599899.