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 0x40c56668b0587ee0cc749ee1840d93f107e8ae917ded87489aa10356553e02a5. 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/e7698b04-7a7f-4273-b335-2edc57826dc4.json and https://artists.proofprofile.net/proofs/artist/e7698b04-7a7f-4273-b335-2edc57826dc4.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 0x27e2a6c08bb0af1437b03e98f755251264a3b5cea89a3a0e71fd073bd209e72b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/ZA4PM2100284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0f4ff6ae29bbd3c1fb91b4a3effaa8cab6cdd06a59ce2df0b8d9ae8d33d64f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ZA4PM2100380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5f88cb4bebcd6c53dbd42363b409d56c23c40a0445e10d6246f97e2d0e8946. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ZA4PM2200503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fab717604305ca1ea113216eb2f90590c191c64d4fea80fe8b4157429ad7512. 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/ZA4PM2200506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d10c6f0993e38e686b00c9e1fed6d408e1683be47f035d63e46a94198efcd23. 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/QZNWQ2375262.
Uyandiva (feat. Khanya De Vocalist & DJ 2K)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00535bf357f797f6fdc59e5928688d409980e98c0ab46e4ae09d1119c7b54295. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ZA56E2527651.
Ngikuthande Ekseni (feat. Yanga Grenade)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bea6844031747f2c38a44a0804c138012b4ce8de7c7010f1141ad5f63803db. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/ZA56E2527653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb027d11a586358c4def9837d0384c7e6b55a4b5eb77f61e19ad5dcb4e59997cf. 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/ZA56E2527655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c8def52a2a2fc15a1898bd3a9f1dd55e383cb0643beef664ebc1ceda283c6e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ZA4PM2100317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83951cbb5e19501476ece1c539270db78af4cd9febe84942b63ba960008e79a4. 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/ZA4PM2200624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35949c0890c0623a77e4759f473b6750b500ef81da46fe7dd39eecb4a966c42b. 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/ZA4PM2100310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5e3a0dbaef0b38e92ddd58fba923818bf66fe5dd2a208df1b5b4f7bcbbdc66. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZAC012400556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af778af291161996194d35dd2690c02b61cc6882211ac54c00e454fea28bdcf. 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/ZAQ652302689.
Linda (feat. Soa Mattrix, Tycoon & Tumisho)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472fc7796fd0e1c25421e9b7152d37e3d27edeca1dceaa9b6e53416f4e0f7692. 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/ZA56E2420144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024c16786cd33e2d19be4994bd96467367be0c6e69b4226dfe439e9c75c40622. 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/ZA8YF2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e058bb9a332770ae4bfc29a2b23d06d166f1590da712ceb9258b318dcd29ad. 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/ZA8YF2400035.