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 0x098d09404894eeab814d2263e6cb78723c5b3c0fd12347e82e52b28d224dd459. 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/3951b93c-d6d8-4b14-9b80-71e4509dccab.json and https://artists.proofprofile.net/proofs/artist/3951b93c-d6d8-4b14-9b80-71e4509dccab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ksasa Lam (feat. Ntando Yamahlubi & Thatohatsi)
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 0x61e9144f583ea2691aa8c458c63921c9bb406330dfb1d1c388d1b6f181448ce3. 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/QZZ662424099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295809ebdd85c24da495b1d9b5769786e9d28d40cb573091972a65b2855c2a56. 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/QZWDW2447020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20a9a8dd17c413ad45810decd534c0ae32d1857f23ad6ff27d5329d81475964. 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/QZWDW2518461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bf52eede5745828670c49a592f0c969e4ba1b03cf013e5a06c1b9ac1c3f186. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USUYG1501011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6ae3ed0578891bca5b1d2f2d22a04aa9bb0e450868b6f2946144c9e8fc08ff. 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/ZAQ652400642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5477f95dccee000bfcec21e5090ef15392b49ea55a56189d834467adaf62cc57. 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/ZAQ652400663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971c531f6a027efafe76f95991229c6854e5c3900f1e40c675910273f91d88a4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ZAQ652400647.
Inhlekiso (feat. Mr Maker, Tonic Blue & Lefa X Rsa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd0687cc8c3846e9888c8d7f358156f56e9301b2722e065aca1eab52e3ab446. 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/ZA40S2401982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a361edb543378fe177c7afdef139986af7a630fed21eb7b93baa5dcf5b8bf4. 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/ZAQ652400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94597a607d8097afce93f76ecf0248a932938534ec411997dbba6963ee5a9d2a. 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/ZA8YF2400050.
Ewe (feat. Nobantu Vilakazi, Eltee, Rea Da Soul, Tonic Blue & Skyywalker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155702a25eafabe3584d5dd4a4aef8dd0b78540c6bd0b586dbb909870a59be26. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ZA56E2420533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ae6123b0f63fab63cf8973487447a2c8465e057ada2ce1d752cbd6064a8651. 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/QZWFQ2454856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543d76350228167b155eaf7de7b236cddbb4ec2b3e48080a99d82ff8356669e7. 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/ZB2NW2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543d76350228167b155eaf7de7b236cddbb4ec2b3e48080a99d82ff8356669e7. 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/ZB2NW2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba06f381cb0653a7b4c67d8eb0967aa8cd5c087695a757a51f3105fb661e9b2. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZN882428809.