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 0x1e6cf43390b3e72b12d1a7c55afe104a2343979b97c36f9a301dbc70752f41bb. 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/9b836eec-8163-455a-8563-6d7cc9f26a31.json and https://artists.proofprofile.net/proofs/artist/9b836eec-8163-455a-8563-6d7cc9f26a31.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 0xbd5229ccf855453b9dc9bed244008bd3521c9985306f237a679266ded69e12ef. 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/USUYG1403182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c917309abb32063c5fc66d3f7098155840623b36d11c8776520221f43a75ac1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USUYG1423561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf595270352e57771c12d029d4247146e99cae127fe799a1d19f9c9cf8b025c00. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USUYG1423562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d6770b2bac16917c21ac3bc08ea94b761a359d3cc53004d8e0d64774ba5d73. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USUYG1423563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28bf5b7d0b6a01e392235f1ca21bd3f48ef3af797f2de1c8f29e92b549525cd. 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/USUYG1423564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693b1f2b7d5515fe80ba5e91457d4377db29f683dcb9559852ff1a82e5f78bc8. Chain 2 (Bitcoin): anchored in block 957827 (2026-07-13T08:59:54Z), 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/ZA41S2304123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231ae98efacfb078df345f8cf795a1a2ee551e69db6cac4fac69f821d54cfbc3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DEY472478133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2035fa864f1fc9fd4cb5f762538500c11684e4ba6c56dc471bc5146bc0aed9. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DEY472481492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e24a00f6dacfb4c0ec11c0f7f17ad199dbbffe1734b2e649558704bd0dc6100. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEY472570120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20e0aa848db7fac37e518a02594ba3d1e6e53684bdbc138683643b5a6c8778d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEY472570118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10cf35ef832603325558a15be870b362e4726c19f1bfc2cdc1de8207cb2eee8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEY472570119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e24a00f6dacfb4c0ec11c0f7f17ad199dbbffe1734b2e649558704bd0dc6100. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/DEY472570120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd501723a3ac8206dca6312066c5e509fb0a7e7375a022225648a0a224f90a0f3. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:32:45Z), 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/DEY472570121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2035fa864f1fc9fd4cb5f762538500c11684e4ba6c56dc471bc5146bc0aed9. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/DEY472481492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21518289eb43b500b0d4da7d9247eb5830b5c890b6f3678165dfab1a9806e908. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/DEY472570123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089e35815406305311e58d93943c797ddb8058525c23b6c1add67732a98de0ab. 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/DEY472570124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5781ddfd56500900295d40c18d7aedb74fc43b4bb9efd669e5db55df04b2bcca. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/DEY472570125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9b4bac387e09b4985b4f9aff54a26a705cefc8950da06e4254ab0b8dad1a8a. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/DEY472570126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9413d671bce4edf817f6d591b7c412df2803f2598eee47731b7a23f46189b0. 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/ZA95J2300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bd2c5544cfb40b8d54ebfc680738730675f0ebf28222e545fe2243cd46498a. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ZA0W02100017.
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