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 0x99b9fa909d5c31633665cf186f42e36da88d9eed2870456ff72badaf5562d60b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/359cef7d-a310-4e86-8895-9a80fc829c6c.json and https://artists.proofprofile.net/proofs/artist/359cef7d-a310-4e86-8895-9a80fc829c6c.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 0x85ee2128d40d3fa815461d0d50f8db7a328f7be36fd9a36b488c60bc75db1e2e. 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/FR9W11919036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce0cdef40c3a009b3951cece6282b84484ad826d9e1c81f0d89c137327926b8. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:50:29Z), 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/QZES92452736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9e25cb66a830a6c1cebe4c92440209367386f3809c16e1bb2c7e6b219aa903. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:55:49Z), 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/QZES92452737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4011fc0b6b3b2cbf68576c36bff76c77c12c11315d9db1ae1b58bcdf2015ce2e. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:40:16Z), 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/QZES92452738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d808c30d2e01b7c2591d956e6d8e4c690588d3cafa750d2fe922b3afabc79c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZES92452739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f32479b034fd12b03d058acb07b29bc651a7de7e490ca8a9a6cfce978b2bf5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES92452741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197e118b584e09d7a4daad66bfbdfa39ce1ec37acacad6e1f8c7e9ad0a786753. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:38:02Z), 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/QZES92452742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde19c789a9039451f66fd0d0d368dc9c5675fad60da66f3c00ff19a12c4fa79c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES92452744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1a10152a015fd4882e70c77bd7535a13ca37323e649b51a77f3c5098116f6a. 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/QZES92452746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af5164b5a790f953a01784d9807661310d3a985ff10fda5e6de3fb6d5cfe0c7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES92452747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c096a325af5dcda99cb5d8397db6d85ef5544fad253e2089f7058f62368a63. 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/QZES92452749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0006459b68e7fe052bbb667370505cc5a3dca95545b55459f6a0d82a89220286. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:07:36Z), 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/QZTB92409887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f2655cc00e917c8db1ed7ea2df11a5dede0bf9146d1e2374b3c83c07f173ed. 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/QZFZ62583974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef5ddc1481df30d93519862e659b7440a11f5274cc62037b39075e821fb4b81. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB42511421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8791c0a22bf29cdd70cbd8efd8bcdfc3ac6e06b7aa6091f611fdf0754a3512f. 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/QZTBA2548220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7667dfcc0200e8651d9673db15f7912113e8de35c75edbf3233a30c26318ca47. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:44:53Z), 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/QT3F52571826.