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 0x59f0d7c8a2668573a856790400b2649370039215a79a98a2be352d133c14a939. 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/d66bf867-e248-41c5-ab75-0719f33c8323.json and https://artists.proofprofile.net/proofs/artist/d66bf867-e248-41c5-ab75-0719f33c8323.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 0x4300310dec6803d60c0459271de71c57a17fb97259eb1e3dc14029b38a33d847. 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/QM6N21724456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac8e1bc04f9ef354286979c5b7e6889b5fc3af12f14d84b43209aefc39adcfc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEH741303306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5623470de2217ff084dfea9440edc529d9beeb31830c782085c75c038cb811e8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEH741815963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36e3b7d0d549959599cfc2bc8805ad29cb17ce4024fdd1b3f26515d1b65888c. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DEH741918097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e40adb01e69d73ac2b94719c1fbfe56a704508f73c3e0a51f1fc238052b86ed. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GRFOT1900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b81da92db7dac41403ed886ae1e531bec71b2c0c3a9de61a9f96f396c01e66. 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/GRFOT1900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b81da92db7dac41403ed886ae1e531bec71b2c0c3a9de61a9f96f396c01e66. 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/GRFOT1900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f1aa08cd7097038fc4efdaf582d4b027a1fec945acdca66f578898cfac82dd. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:03:29Z), 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/GRFOT2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f1aa08cd7097038fc4efdaf582d4b027a1fec945acdca66f578898cfac82dd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GRFOT2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f19a5ab09fbc234377fdb35f575a6d42764a1f0da10a1c15857148d932a5d2. 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/DEH742050238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8779201caef49dde5e4f17ce3b85fc3406b620c60eff1a94be7d630d704fd74e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEH742160757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb32d8b9a0591127a2d037296c8a63db06f6974af25e8fd404bae7c20a64191. 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/GRFOT2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aa577144b1e552c07fa9e00abcd6df973ca220b77d09901c5daa286e5bb989. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GRFOT2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6455bd99f66f65ef2fa2af9343de0be6b32c39e7ae1498668e40bbaf73cc9f46. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEH742226688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88759b8c4960babecddf034c7e7cfa062828233dc8000ad9fc283fe70a53b19. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEH742303240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431f9585c06222f9546299cc982334de9fb316b019ce7a1c1f9bc4111e2e4749. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/DEH742402159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82864a0fcc505571a740b2d7d0648565aa6baeee8fcae7a5f98121639d1edf5b. 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/DEH742414296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905937cb1d40b197087aab0824c81e707b3a75effff416000d7975e609576226. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEH742424105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38799dfc14f2a4b269eeb2dcf1c0a05daf2fac832f4c2ae807d7ef963ea8b6a6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEH742433603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed111665dc64e8d5f783eaadebdb4bcba2b0974a99712f632bd4c8ea0f73573. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEH742441267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a587cb342e9ae933ea5621fac5a3af015cc527b82a6f57f8cd8f6852da130d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJF2568738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175d4b69b5a49c47907ce46f83edc4ef8b189a8d49a8d87e5ca4cfd563109bb8. 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/DEH742501233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d908db28ecb60757f996edcd1f3f9860a44904915b184e414cdf7cb084d4ab. 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/DEH742503787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ad511d8f47a7660128ac207b8a191b9b79323caa31512de45c9f8112b441b4. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DEH742510781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb856088c754e33aff4459349616b93d4a46daa5a45c6f5cae3cb32dc740fbf8. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DEH742519101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7727baa03355b31e725f4c3ece2abbad641bc17d047b3e7b26a8e91030395c0e. 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/DEH742520282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d197b9c4db23fda3d7626b78fa60190d09c3bc6e892791d1d068d380375444. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:08:21Z), 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/QT65Y2597040.
I Still Haven't Found What I'm Looking For
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5f1d22b0b001ae5783aa44c1f14bc9fd4702137a2c97589b4e2fb67c86f696. 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/US83Z2300565.