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 0xe7c93b769a23c915ee68b0a420882af0f6904841af077d7db7ff6116a985d062. 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/5349a559-f80a-4a59-ae18-ae50eb1c425f.json and https://artists.proofprofile.net/proofs/artist/5349a559-f80a-4a59-ae18-ae50eb1c425f.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 0x1f855041bffa329e3b17f591717e568b30728aa3d81696ca4b89dda277e6fbce. 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/ZAMJB2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68a551415431667bc6dba924945bce240b4cd100dd0c2c76a2cc39762668ad2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ZAMJB2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c5b03d4307c105f5bf5273fab593368337ceeac4a6b4090bab660635f0184b. 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/ZAMJB2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0506f29cbca0ffca08e6991edccde02017de2e7bb5677924f0c80f89f93923. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ZAMJB2100001.
In Love (feat. Mduduzi Ncube, Zazi Kunene, Superstar ME, Mapara A Jazz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd093db7767a13addd794258a43383870c49405c6aee887a00e4fd096ff0b403. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ZB9WN2200010.
Ngidlisiwe (feat. Mduduzi Ncube, Mr Brown)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e8b599e9ac928b3e23320457c1fcc61e96b1e38ac4935121b10f562a7f142d. 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/ZB9WN2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8584e22e75ce6c4bab2b79ecad997dcc0025bbcd01815d063bcbe327f64f1ec. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ZB9WN2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76f3d6b98d798cf562210c3b54765ec62dc342b2b422bf71e83f660b6ae3598. 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/ZB9WN2200003.
Vuma Ndoda (feat. Zola 7, Ray T, Superstar ME)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18f761d033aa8b75527bd88e63c98befbd6f85260205967098375baa74d5ac4. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ZB9WN2200004.
Umamakho NO (feat. DJ Cleo & Mduduzi Ncube & Ray T)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7811a555fddd1aab95047253b5ec263a218b5739e065e78c4bef98cf099774d5. 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/ZB9WN2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138645f5452045c8e58e00c2a897e88451bef6fe42cd9a0b95d013c6a7506015. 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/ZB9WN2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7fa2aa4a45f60973b9b5f8521fdf34886a987d4d2523ca28a08296cf2f88fc. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ZB9WN2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50884ed10afa991c67dbe2ccbc0baad38197415559751c6a1ec638680bc688f7. 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/ZB9WN2300033.
Ngiphelele (feat. Mazet SA, Ray T, Snowlesa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c97bae0f4eed36d359cfaaa56d80d5800cf0e7384e9d9c24761d2eab82edec4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ZB9WN2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b630bbb1235cab3ed269a4fb65b314bd0ffd6d1a0a1591c5da8e791158f9de. 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/ZB9WN2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc377a8bfeb10efc4bc49660cdb1fec01b6a08f6e45ebc9bdd91302a774f7219e. 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/ZB9WN2400007.
Uyavela (feat. Rethabile Khumalo, Nokwazi & DJ ALE)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05a916e388a3c6cb9f578cdb67bb6ecb3aa35c47b9438f9f02c9b1bf8f71d53. 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/ZB9WN2400013.
Ziw'shilisi (feat. Xowla, Blaklez & Zakwe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394e84698827f23a17f9190ef236bada92ca319f97ca864c678cb19217169b86. 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/ZB9WN2400014.
Icilongo (feat. Nokwazi & Nobantu Vilakazi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd977157ac8353ec26e40f62cacc2791ea51bcee3b4fbe98d0ec973ce345155dd. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/ZB9WN2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fe188541531364ec82211f6eae878aef3dd69bf304d3a6177c843692b83477. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ZB9WN2300007.