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 0x662d7adf6c8bb564704467a361f73713663ac80ade57bce3c8ada447dc480229. 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/85a49855-cdf8-432d-baf7-cd5a9ad75159.json and https://artists.proofprofile.net/proofs/artist/85a49855-cdf8-432d-baf7-cd5a9ad75159.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 0x409f2cf469dd39198d340017a95c351b5e923eda5bda07a416d4b956fb30e73c. 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/FRX201926145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c15d27d6d3633ce7efbc218624e95644e5fec130d1caade08a69ef272fc76d. Chain 2 (Bitcoin): anchored in block 957535 (2026-07-11T07:11:01Z), 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/FRX201923159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323902cd363533bb23ff54aa89f2186f93dabdda15bbecf981e94ccbdb181a7b. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/FRX201923174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513b90cbac648d0be6cdc24755dd6c5cea365ed80416aba0f3807c5552c9454b. 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/ZA56E1701080.
Na Na Na (feat. Kolly, Magic Soldier Kingorongoro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ab035e66a14580a1e95e6b4b5659c8beca89158b595243bab761580e83f7b5. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/FR26V2096181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd417938c69baa393d4722e82bb5e5b176c1a2274fd97c966b34f6aa7c9570065. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/FR26V2096189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153efb70403319ed96aae8ec65ff8c0b9119d00b3fd1c6c56632fa47c53e1f34. 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/FR26V2096190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf8ff77244b369dcfc6b66d6a5098380122dc3350e6bc5e39b47b5f5895473a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR26V2096206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6887d06a91d43beee47230e61dd1177bd4b4845413088d6046788fbfa472ad. 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/FR26V2096209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8915841e3b4b1aac2bfa05c647568403d7a84e5790c4f9fad52a529c6e037d. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZNJY2382687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8915841e3b4b1aac2bfa05c647568403d7a84e5790c4f9fad52a529c6e037d. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZNJY2382687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06435dbbea644cf60ea7fc8834257e7ae491085dd736cb051886a35c203c85c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZW9L2414240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43404342b9c911528c606975f5890909f4182c5e3afe6f90a562a1bfa70f0e14. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZW9K2473041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1fed382ff40c4c27c0d66171a3b9fb67b3766eb55c2fad470fada561fac641. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZW9L2414245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4fdc985165bb548533c4bc63fa7777fee7c2f98f8028bdc88ca673cf98075b. 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/QZFYY1981130.