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 0x70b124fe0eef4ebb3df118cbef49c709008f2e58cb7f6d455bd677378884af9d. 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/4240aa14-485d-43f0-a352-c068a205fa52.json and https://artists.proofprofile.net/proofs/artist/4240aa14-485d-43f0-a352-c068a205fa52.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 0x425a4ba9018d58162e7de24dcadaed643dc1ba56cfed0bd9146d7f9040d5dbe9. 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/ZAA020400291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5243fbdd08ff821c372bac1b0caf7a01db317276eba2a9407a9ea7ce9beaa413. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ZAA020400292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70f83a398a882dbd0861b2faaaf14bff6ff720fc716fa784f30ff9a0ab47499. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ZAA020400294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe676d51fe4f99d646542ccb4a973b99f266c92bd8b9c24c474626111cb93741d. 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/ZAA020400297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054e50ce356e53fc6e42c0c3d38e04b433110361c9d5a537f6e4988c8ec5263b. 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/ZAA020400299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4dfb4b5eae95454bc987d5d3bc0d0f8d73ea01feaad16a3ff9244ff2da0238. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/ZAA020400296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7aedb29b32c6720ade87abb559800c434dffc05096eeb686efdaafb83062a8d. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/ZAA020500503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f3c6edd7c63ddd6b8cd9584c251642d1119d4f64e770eab16d8b03bca37c2c. 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/ZAA020500504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ada34835e58c23d4b2d36f1fe5bb987d7d84d34328e0bb59cf776260cf8cf15. 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/ZAA020500505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388ec9497c868f01eee54fdfd15d5521a4a532a2fbe9fbb0329e1697a207ed6f. 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/ZAA020500510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8723df717d4090d0af415247f8fdc757994d06fa9d5819df8c225900da4823d3. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/ZAA020500507.
Ungalahl' Ithemba (feat. Thembisile Ntaka)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b86fd202aac2079114e74db12a30568bc7687edfbf0fd1285f1cbeff0b05318. 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/ZAA010600468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a12bbd13c770d0a452a21a89c4b73f8d002d7903cfd1c5a44534202f110246. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ZAC031700253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88b6f36a27d244b3da1ce576990767226702c222eab9da8c85f2696907ddf8a. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:05:43Z), 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/ZAC031700254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdacfac984cc3d0e6aca3e3175d03db61d8eabab84517b8faf1a04753cca35e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/ZAC031700257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab141accbdcada347e7f63ea48e0209c9b54e4e706c80eabb54751189643df5e. 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/ZAC031700258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05472540da157f39a8e9f9b85237da757ae0e6c26c33a8e9e1f940db129fda2e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZAA641100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd763b38c70a3b9b5be1b5be3686fb881d911e8742b039e5bef460b8003b5d19. 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/ZAA641100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa103b55716f88dacbdd245bc165367ac9526185519b443cec5b1357965592c07. 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/ZAA641100042.