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 0xc4de557af12373853510136aab19a58075eca9c4fb1001fc465fbaf8f5108bd9. 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/f1f4def0-f3a9-4831-9208-3645041b61db.json and https://artists.proofprofile.net/proofs/artist/f1f4def0-f3a9-4831-9208-3645041b61db.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 0x335cfe46a294b6be8da913d6a8b66a526a9d6db176e1b7446dd20dde54648ae9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USUM71009872.
My Brothers (feat. JaiYung & Uiie Popcorn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3475232f129db8868c4600c5031af33e340feda1bc521bbf8c1cb0964a15905f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ85M1995417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74965f27648d2c6e9cd44d5772d9caaf97123f11ec6d7a401881a6e16c3fc288. 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/QZ85M1995419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5604cbb7be47805375dcd6a578668cc1f30114df87668f6960a8c0764fa71a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/CBEYJ2462560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ac9ec3b67497f9c10af20f3627b422b38a677b02ba338ad5af7e4eeb67698c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CAGOO2525793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c093b52bde896ef5731d5fb6ed2ed2c4e40751d2993d613a8b236e04233c73d. 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/GBKPL2211374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20495e07d04cb7efb42f822296dce2258223cd4587c859b72f62e246d3e1f75c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USUYG1085466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117ce64effbbc8feaceb5b87b7783b8a00bb8e1d9d87eb9d602c4620ccc952ce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKPL2211372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48e048de3e13c0f005d57cbfc03b25a1059da745a631df301d5f237bd98487e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBKPL2211373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351468c48ae43b0d18d762cef7d4ecab044b6b099e6f7829e3cd8cd2c0b36b37. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USUYG1122788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e88a6ea8fdbd925e13b98d8fae26f7df6497be8de0f5e1ccec1a784211447ed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM81788671.
Ultimate R&B 2009 (International Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9add9b53be5b23a7ddf547121032a99e8f752479492cd6db0c284ba24a2b17b. 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/USUM70961307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3047cc67774f4665ade9db0ae4f41edcabcfb20697a53d84d5e0e2652d83ad65. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US5ED2405783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3047cc67774f4665ade9db0ae4f41edcabcfb20697a53d84d5e0e2652d83ad65. 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/US5ED2405783.