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 0x3c88548639d15b88b5155c7a2bf67266ae29a19dad193eb75590c1d24c5a7700. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd394f61-9e28-41b7-a5a9-83ac5f3e261d.json and https://artists.proofprofile.net/proofs/artist/fd394f61-9e28-41b7-a5a9-83ac5f3e261d.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 0xa94a34f2f5eab321d835584259cea18535e7886e7c1358ce49bdd92162cd2c62. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2456045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ad383e73e81f7bf3c0103018735bbc7c10c95b34fe2915e00236a457ba035a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBK6Y2251012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f39d9d06f463d34eb68f2625fe718b95feea82b7b4cb71406cbb12884df0c8d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBK6Y2251011.
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 0x2e07250cd118e421a41aa966f360a267f9e5e7c9fd49069e81e9d9b4cc23ba5a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2255475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f94dc4a475d1bac33e2313c6b7b66a70a8947d59abdda80f59f7b5ec2e02b8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z2105245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f343bdf3f9a63a82d1c06c1b3011ee2a5126c6c1123385ebe44282e9d7e877. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBGD82100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c473aa8f525355bac2b4274adc842b9e4ca5010e94b0477e97f7344de430ed. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GBGD82100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13125dae20e50c15c7dcdb29b15cbf7b4be0f8af87c496bd8c29667ee1332b9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX452136516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95f9576b9378da1a782510dca6e43e0e96a9041f73324fb659d1f11d9e13e8f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX452136515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291f84409ee49cf70f2c7aebf8e75494aba661b266c37a3bee453b7d372a7d6d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX452135882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761068d105cbaf7e5a6420e6bf651efa32d42a8a88314b81d81d2e73c4988777. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:54:43Z), 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/GBLV62005897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdcd7d3c54b5966a000aaf6551b38d591d6832bbd1ede6d0d66800c5982b059. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2039077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1bc99b30cad4bd8a86fad086d85fa27d5ae49489de7355715817527347b29d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GRLP11901742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c69a481f364bbcc8e12efaf070c144c68db96c2ac0c67494b53ce8dc0d9d77. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBLV61913723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5b1c1f62f68e208222d5a6f07dded6cb724d01fb87d0b17094b12cecee4564. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBK6Y1913701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92193db0fb50a5c2860a13dd5224e684bfc91de1b5039f7ecb8239a6259bab21. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBK6Y1913702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d7e6cb22437c0851acd0d36e4638e4d1d07adff17e2a3146b7558dd489c43a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR1913110.