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 0x944831487d2593f336a8974cd7ef2474ef15a923189448e1cc863b44df80bd8c. 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/f00b042b-28b4-4b24-954c-3c8548281ee4.json and https://artists.proofprofile.net/proofs/artist/f00b042b-28b4-4b24-954c-3c8548281ee4.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 0xd1a981b4c6382d02f82c067cda68e8b366ca584f9acd0552914f581a57df1913. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCADX1861456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe084d1be195b140928119236f41ec33b41df240cae2d48228a8930bd0c8155. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:54:40Z), 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/TCADZ1826185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0251083e22657aa2e703ca200908ce1ef19034ceb810e063473137d33a913e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAEB1911906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5fa11abebbca002b2244ff4af5abe7da5e7bcfe2484364fc6d67a354010fbc. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAEL1906610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba077bf468fd217b0cc38eb8265d86d121eb1cad5ae56a4092c8b49fe261f109. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/KRF152100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327260f02c911c0d1112bb4d3edc1c2c77292d5b93ba0a1f660ffd659772622a. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/KRF152100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc0293943121f7f2af0c01294a7d9d40b02fba5ac97470edb588a07591d8ed8. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/KRF152100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2431052f02c53a4d18fee7ad215f129b3c98d55cdb7d0158681f6e49bc76297e. 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/KRF152100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc6ef751b6f361d27963164ec1088aa4aaf910cf0fca2a363415f26e983075d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:11:29Z), 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/KRF152100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0517c7672c9a9d4bdeab440c968a5b401386379e874137c2469ef2fb9539f816. 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/KRF152100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24437fa4c3a35f8197e120daa35032bbf5a8e4e7e31f51da06efbba8ff4b6a37. 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/KRF152400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f17af7993ae85fa300b916485f7fe63eaa10a07b8a76f82f8fd8181eaaaf34e. 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/KRA492400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d7ca78366daeeb6d8e099f2ec58d62a1a4477054d08954e7fd5689fd394921. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRA492400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9bbf3cd42b732e81b0799c29a8cf47142ec696ee706918069255042fe60822. 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/KRA492400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70e3ec141d3c2084c6a3eaf0750bc7a1aaffd9dc3adfedec6fa5b04ce228e7a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRA492400253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9325eaab9af9a03530ecc571dcdf40c260c2c378e1f5c0adaeff6d8b39bc89. 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/KRA492400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95aae506bd4673bee80bbc1c6418461a332194c6d34c1bc5c4542ed72033cb0. 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/KRA492400255.