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 0x3d09027a17326233ee462992830dceeb382b70d343c9c46c5808ed5a9f10e7ef. 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/f30be5cf-fbe9-4898-a852-9e3776256efa.json and https://artists.proofprofile.net/proofs/artist/f30be5cf-fbe9-4898-a852-9e3776256efa.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 0x57acd8874b616664a49347deaaaabb6d175df7a3609fe5cd819994c52a8545d1. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZHN82212244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65aa7d5f19e51367592d74899b2a6391b0dab94ac079a50d4d526915cad154c3. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZHN82212245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752a65c28848254dfb6eb1328181b2eead7f1b030d786d0481a4e0433f35b860. 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/QZTB42255685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498ffd1e16fe2654dc82d7e50ebd0e3ef643185499d0df17913e07507da5192c. 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/QZTB42255686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22087c4318544595ba3b5026a1656520ad52f350db9ed5ad37a9ef9f608e7029. 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/QZTB42255687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba2cfde60cf28a70c3ec5aa112fc40f30ea571b5406789cb42f64731408e20d. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZTB42255688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd300f3e326c130f3c29b13a51bb7c3026c6b6cdfaecfd4a6d03e9f545ba1e614. 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/QZTB42255689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc890402e4cedfd3560e7511b9ea6b8803cf72c3e997fdf165c1dedd68c1d85be. 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/QZWFE2363335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb155406d5d32a23443fef36f670b0d01f10c472c7860fd65827615192d933a51. 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/QZWFE2363336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be6ea349b1efcaf5277403404d12fd0751ebdc05c2273c9c8efe2322a184949. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZWFE2363337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd420adb6a3ab807b28af8592f834bf7e21ae20c7ddde03cedfa3728fe3305ad. 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/QZWFE2363338.
Umoyeni, Vol. 1 (Mixed By Gino Uzokdlalela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6ba7e3c9bf28387c21db14436874078e9ff0418a4e5ad4b1b50d3401b6a8a1. 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/QZK6F2430446.
Gqom Mix 15 August 2024 (Mixed by Gino Uzokdlalela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ad3f610f4b9d9facc1772fa26126072b2310d1a0e63f9fe7352bdd36ba2b0e. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZWFG2454748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484fd0658944d76ee6df78847680fd8100ea853ea8c9f15669c65a653b3dfbbe. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFG2454749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71595977fea68ee19df9b496d70c7963fd2425861b2ede041238946a0cba8855. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZWFG2454750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba22b58f7410c86d637ef0d02ac04f053c9f056aa8b9fcbd66d27ad186eff9c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6K2564928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812cfe68a384f5de50e7b2f65d4366e31bea1e3c498466f222b1f33ad8267210. 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/USLZJ2376186.