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 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 0x721c6b9de62f262d7f224512be1d9de4f650677625c6826d890714c57d6f114c. 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/fd4a221e-7e62-4cb4-ac45-b4721c373200.json and https://artists.proofprofile.net/proofs/artist/fd4a221e-7e62-4cb4-ac45-b4721c373200.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 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 0x6725c526d506d33237a212b7f9dd11dc5b2312de8fc4aff116b96cf536e9a187. 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/CA5KR1053580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e887197927f47b6f4db84c43e209b59f1e53a1d3f533863d70c761167204f4. 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/CA5KR1512276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442c2e46ed85346859cd0801d1af6980f685203599f2ce1442b741d3b46f16a5. 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/GBWUL2076477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cdb79d73e1c4e108e999f7809fa6e23d39a7ad53373bd425aa78764f953cfe. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBRKQ2001548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8da83ad7d8409b2ba8ed3981eae1122f79987dc88a06d81bdd568ab5f77386. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBRKQ2192822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386c2f6c8de20c0880b8e8c30de96134e77efe52c513358839b6eda93e44faaa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBRKQ2192828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0cd4d0f6ce994249c08d53b090076373f5a8ff163ae396119851716b188027. 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/GBWUL2122590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36169383a220d2b818a633396bc20649175c0830f65581ec6d94663ee26dbaa6. 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/USLZJ2324715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180957309f16a6f02745c415bb399a8f34b4a6f80ec66639710fb3e27c58ea2f. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZ5FN2488937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8f492d345e67dc028f3e37590f3bbf614483faf70a8307f4d5aecf3906cf31. 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/QZTV32417349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ee534d7c7105264f440a4396a6d14a35259488fc4ce2bbde553c31285ac4ce. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBKQU2444997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cb7d27cc0c76014dd0d0e3c782b3f6143c5403a57d7a3b01b3ed5fe58284b5. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZZ8A2460774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4cafce5394de4606bb670f37f13e32b7f34d6a5298557e1860d3898998241c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZZEB2421476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e75734f30a629d8f59a2b1d7065392a7304a15a8b06b57540c0aae35f07d9b1. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/GBKQU2531180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd407e8df910c0870a2eefff676a05e4ba706a7ebee3f333ac396dddd5e45c4d. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZWDE2515777.
Lei Lei - Confused x Matt Klein Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b7a18d6f0aa66588134d86625fb31f36f925cab36df77a34a7cde346789676. 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/QZWDE2515975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b592bd73d5c85246106bf44d6ff39b243bf8d38a3d218c9262b22539a4cb463. 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/QZZ8A2532542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2089b9c4a2e9f4c47cf276382d6c0dd6df7717bab90e0e3c81942cd43b648dd1. 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/CA5KR1514077.
LET'S GET FKD UP (feat. Mondello' G & Tribbs) [Strong R. Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7486e058626d408ee3410ee01762f884fd20c92518e57fced93a497e58c2f0d1. 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/DEE862400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec93da075bdb9b7fa95b00965e3514f7a7171be20ee055fa9f0560c93b8f334a. 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/HUMAG2020324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06265a2d07692cd167ca7f4e15f84c2207f8a74a300b40b9375be1b6b8f1fa99. 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/GBKQU1753927.