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 0xdec7ebd7a7e8e87ca87f5f60d442e5c23def1e211a39885d1512800de0d6def2. 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/415ab0a0-3ccd-4fc7-8136-7b6c7be0ec1b.json and https://artists.proofprofile.net/proofs/artist/415ab0a0-3ccd-4fc7-8136-7b6c7be0ec1b.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 0xdbb47719ec1a55eb80515138c5eea72eff93fc35adb24fe1b832ce8d1df8cb73. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FR59R1748594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74685b65a7c1c1ae66c932ed580b57a759d200714bc78a01c41c1993bb3283a9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR59R1748595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da84359bd8b2a662d98bca01fa7bb6e89d15ce1bdfc534124d25fd245cffa55. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:45:07Z), 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/FR59R1748597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9cb72284bc31def23d4b11ac4ff13f68e07112da48ee8057d5f72c0732f75b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR59R1748598.
Surfer (Osshu aka Vadim Shuttle & Osvit Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3663e2af9ffec6a6a6007e35488463c5d771cd824bdd036224aaae969f7e8f6d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR59R1748593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dacbb9efa0dfa9a0d9f8fb1f7c6a1cbabea09ff3652feedc1edd94c685fc3c5. 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/FR2X41837567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb47719ec1a55eb80515138c5eea72eff93fc35adb24fe1b832ce8d1df8cb73. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:53:37Z), 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/FR59R1748594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da84359bd8b2a662d98bca01fa7bb6e89d15ce1bdfc534124d25fd245cffa55. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FR59R1748597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bc78b4e040175b1ddf2975aee688dc3f18d95b22b1f51627dffe6e601417b8. 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/FR59R1748596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a329735736ba00a1c9239438c33d73b6ada3fb15982a2feb00beebe7007c74. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/FR59R1990882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa8f1eaad0e12533126bc749bd5556fd67f8141b6f35f3279579923c77ba264. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR10S2176703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77eaf5e4ea34c01a490c3f316fd23018bc4be5d2073da834db427e0c88a97ab2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FRX762255456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ea7dd345a11b5db457c4ab6ec188fac8fa955d59d6fa6b4028e2b70d48143d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX762255458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08e35771d528ecf8ca3d7cd8cb24a9a0120c20cc3cfbcbedeaaad208d988c81. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX762255461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19a3a1ad1cf3757ce095a07e6dcf1b80312d5354cf92d773fd8cc78104a4337. 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/FRX762255462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fa7c0133b26966a522a4bfa678ccb1991ee955e3afaa500c63755f817792a2. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/FRX762255464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592e74f2cbaf24a2c7df89bb365eff81331fbfaed47c8a6feb6f80dc84e326ae. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QMFME2404921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7501114572a2ef7a2661f03dd38775e908acc95b991de67134fd02947d3b669d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QMDA72496868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ef2ddad0f7ef0733af97de1351f45ab77f5af95c4d4505f9867efb77aabc70. 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/QMDA62565654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81229e6be110d29509ecef939fc85ba3c1dbf95d6c0209eeb81e61113b0be05. 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/DGA092300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307c3c033e7da9dfdd176245e843e80e23d1c9829994c7468b9e967154f09be0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX762255463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cefbb2f8d2499710d67d6fabebeaadba069a08e614b4ee82de8df897b7d8d0. 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/DGA082279586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc83ab05956e5eb3c71b312a3906e93e6fad5f4255e47a53c5abf10e561d394. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DGA0M2374211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb51bff4d0e464262f243444b2d042e70be0f7bedba235512a63b94c0ae5532. 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/FR59R1748599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9f521f4bb7afae80ce0ab1e9be6b789e947f97a658b2a964ddb6447b361d6c. 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/FRX201915071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002c54958405fa6df1e8ab51e0e37511fc0092a1d4093d7b8d39d626dd51eaec. 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/FRX202160798.