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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696dd556c0e6c6299d718ff81c46d2fb0360b0b1e1868501d614fd42b18db0c9. 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/cac42424-c5b9-46d8-94a2-0ecaf696da6c.json and https://artists.proofprofile.net/proofs/artist/cac42424-c5b9-46d8-94a2-0ecaf696da6c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1773c9b422a8aeda648468ae3d2a1abb475eaa6420207ce9f7c6b833d1c87ca. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA0L2351247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a58680d4d4b8a40a907039547760bbe3b29aba11aa6b1d989e3263cd185cc0d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DGA0Q2419829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e81f685e3020dc8f95b7d6955dcdf1cfc2777e9f02744183fbebfa54df66724. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX282553291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915367a666d4aae88ebf9ea212244892f30bb293cc9fb0146080c9f052ec7f4e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRX282553292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de8177b36f908334eeb2380b4d0e3f13068693ceb9d383068204a8c4fffb95f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRX282553295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb17a11eea8424dec6da94a25cc72f255bae969b4d7d23d757d3ad9be92c46b7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX282553296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8c68a837e04cd653948b208a8a5b0fab5dead2deef18d4aa40ac244b96b184. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:27:07Z), 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/FRX282553297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9c1bb79d4b598c84eb3a806329e2e6fe843b2646d76f1de4675d3a19396ccb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR59R2313552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53526f9997ceaf0ec6853da049f6ab87dad1ca66db2ef0df7f756c42ef937d47. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:08:35Z), 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/DGA0M2301532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7255772d2e5decd429a2b85152b19716b14c56c8ebb0256f4a0c853a2b6a5d8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZAMID2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d010cc8551ee4c85cee7234111c01db95a1f541b21661e12b426cda9544eacb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ZAC012301459.
Xola (feat. Nobuhle, Ze2 & Young Stunna)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbfd922b7992c53a56b2ecfabe7030ef06f1ac88c61cec77810181d56b78ef8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZB88P2200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2196185d3442da92b95bb963645ab7ce26e57be150e89bffbb10c2e0a6ea4228. 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/USUYG1578992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d0584eb378926b06fdddbb0129f8ae848fffb53fd2118fd0e2b3649670f88b. 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/ZA60J2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e785a79996268738e2461ed70dacf11718c7dfaf40391ab90c36d09ce4446ae. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:04:40Z), 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/ZAQ652101288.
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 0xe77c5db39043a65ccb01ccb932317e955a56a34c6e3f2aee4a781414bf5f02c7. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FR59R2313553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c1cf791c0fc47decd461508c2a75adcb0c48f7e70f5b12fffd0820eeca7311. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DGA0M2301551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af5cfee3c9c6923be9ee78f71aaf1e7a1eafa6b4a937c6fd46c3683b3656c6b. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DGA072228238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ca68d4487ae86ca5e085a73836c444e545e6b6b16573be57e96f3e6681c1aa. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DGA0Q2316799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d0f7a5ee5bb8d9d2c1c73eee28528199a5dd495fc9d606a92d5e4b2519f5c6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DGA0Q2316801.
Siyabonga (feat. Ze2 & Happy Jazzman & Buhle Sax)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5e456d1251a644fc48f9aa4b6cd9c05fe915007b365f48636c048258be4771. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/ZA56E2303968.