thumb|Rogerson in 2014 Tom Rogerson is a British musician. He is the founder of Three Trapped Tigers and has also made music with others, such as Finding Shore (2017) with Brian Eno. Career Rogerson
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 0x2b8585402fb9b7b9185dcc9fbf82b678b75915878604bb29c8a642000cf8d5d7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc459623-2623-4b84-8ba3-0206f65738cb.json and https://artists.proofprofile.net/proofs/artist/dc459623-2623-4b84-8ba3-0206f65738cb.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 0xaeffe0961b6a99b57e102327f813fbf741cdd97cca2234c9a9c18465e79e9ba7. 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/USJ5G1714601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098e84d5c15b9657c246ab316d6c1e58a80488128e5cf7697d4408678049650b. 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/USJ5G1714602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61717629f37d46b0b8f36aa25cb32e6cd7708bbd76262a0d3e2fa0469cceaf8b. 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/USJ5G1714603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276f70c48fcc3a190e995431597c1629f63dff3a6197a1ff0c2785f2c1e364e1. 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/USJ5G1714604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63aff5ebfae5948be4c935b76da1e9d3ba8c5763337c8515684c164fd6b049a5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USJ5G1714605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c9c6e51582b632220804fd4eac1e913152870a03ddccf0dfc4e55385e4a2fc. 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/USJ5G1714606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58509506d855967ba19ec53530c708c477e099fc9aeb23b85364e122c3aa158. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USJ5G1714607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a9ad152e8647941d2ff9a87612951c95af952bc210a912a05c562649eb0940. 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/USJ5G1714608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc768f8886b70cf3609492c2743f3c7739fd22e67f4de2f3483c03adb8def165a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USJ5G1714609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f963795fdc52dd0edb3249e3d7e7c6255fb7311fbf21a006f27ba2e7517a3b5. 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/USJ5G1714610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c044e49fc760aecadf99982d02294ab8bc456121e7be081b4c5d5dbec529fa. 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/USJ5G1714611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae4f831ea479d0b36d4ee7ad3c466bf828f8912e8b0756118484d97c8318c99. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USJ5G1714612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fecc58078408189130d42634328553f8abbc95fa3542b75ed9f6d6eb3375d78. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USJ5G1714613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137bb3d0e6b8c6a7ca24f060df9d5e6b07eef179031126fa17bcdb90ea5766b5. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/US78L2220802.