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 0x5ae617b9d75041f6cb59e14af9a148574381095fe42f1b7289f3a87f7744546c. 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/1037b8e2-10e5-4a81-b3d7-bce1a0d0225d.json and https://artists.proofprofile.net/proofs/artist/1037b8e2-10e5-4a81-b3d7-bce1a0d0225d.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 0x61bf7910a0c64e18c2ddea9af069e73ee45c8743b33d947a5df97e8fe0d314db. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/ZAEI72000121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0e116bc7886619c761ffda896194ff6437eaa16014608ce7b329d6b6fe96a1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ZAEI72000125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bf7910a0c64e18c2ddea9af069e73ee45c8743b33d947a5df97e8fe0d314db. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ZAEI72000121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede2d49bbcc5bc22ea6bca8db86f0556b24ce31f0706c1daf27989b903958a5e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/ZAEI72000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0372a0b3e617a65fa3fd09af618ef62ab5a72265529f7b9ce0a39940565a7f8f. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/ZAEI72000124.
Amaviki (feat. Jadenfunky and Stitchgawd)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b58ca9ee1cf72bf1d80c756d9380e7df36becfcbefd4a862ec93f4de3b2ff40. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ZA56E2303372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c286ca3e5c84d48fde543b40ebbbb0d247ff6537860effcb6713bc0bb3dc42f. 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/ZA56E2304024.
Mhlaba wonke (feat. Sino Msolo, Mthunzi, Da Ish)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629d19b31316d039db0966d6fd3ffbe76eeae449860a8604e1e1d789f25ae53e. 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/ZA56E2304025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd8e2a72bb28274cbbaf8c6967608d2a36797d7ee3b09c99c272f8216e4bc04. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ZA56E2304026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fe4b641cfe66232782400977256d5a017f2ef8484cc3e36e757c5be6f3ce21. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ZA56E2304027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfb691b56c8773f7f055128a7718456cc3f1c6b550b45406cbaa9843a020fef. 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/ZA56E2304028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff9ce25d5cb1edbd3742475a75f61a2740ff06e79e39f9baec47fc7b433d6c0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ZA56E2304029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308de0b32844183d26eb31329fdc3b0345517165be45bfdf1cfee06b12c39881. 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/ZA56E2304030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80184a260b673469a03d1e712674bd0cab10f80d08931af01b44acab74bf75da. 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/ZA56E2304031.
Inhliziyo yomuntu (feat. Siya Shezi, Kozzi, Dr Thulz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0b4ebef43ef68cd5bef18fa2a26d1f200028207a9f7faf92e0a297ef7cd09a. 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/ZA56E2304032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e307728a9091cb37b344c77b242bb8a957707149502af3e17cdbc2f23866e26. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ZA56E2304033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77663c317257b245afd4e392130841c0db47e1f84a10b76f51774f073d72fe5. 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/ZA56E2304034.
Loadshedding (feat. Just Bheki, ilovelethu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ec5400473525e74a7227c8077264560154bf1e26517955a8942c7fb89e87be. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ZA56E2304035.
Uzongikhumbula (feat. Jadenfunky, !Sooks, Siya Shezi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7da2310a794262ecf30d01886378ca68071f468e4fe35ca6b0e4e1ae9a0941. 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/ZA56E2304036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd80d01625ee2cd26c9d0ee631d38eeae006735a84d917da8205011b4c47e359. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ZA56E2304037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041a53c5434c05d586fb15effd039c8a82c4a053e3983a8938767e971839a890. 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/ZA56E2419775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb213e006cc8684b21ada661a41fb8f9dd70a1785ef72a9ea102fc754cfff17e5. 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/ZA56E2419776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041a53c5434c05d586fb15effd039c8a82c4a053e3983a8938767e971839a890. 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/ZA56E2419775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb213e006cc8684b21ada661a41fb8f9dd70a1785ef72a9ea102fc754cfff17e5. 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/ZA56E2419776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e53d0e9ee22a52d0b3307c4c30b578905166a0c9dcbfaf0e83bb917d43ff12. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ZA56E2419777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006b8359156db20b0f8db695df32a88609eef15d707e67595c640ec594f3c192. 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/ZA56E2419778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edaeeb8c7a992ef4dbd2168a5408199616d724cda7dff5d64cb84acdc5045d9. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ZA56E2419779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e12df4a728b52ffd9f4d99c03ec876b26028677d2e2eb9b870acd90ebbe7d5b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ZA56E2528307.
Intando Yakhe (feat. Visca, Mdoovar & Just Bheki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa738454c31ca0f66885dee1645f39c884416f5d731e765aeae098ff7723b553. 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/ZAA012200150.