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 0xdd12380c9504b79bbfce1f3bb990c16a7e97dfc1f3d08158d87aca9d191a3b2c. 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/c1e9c47f-3a1b-43a3-ae91-4d676cb742db.json and https://artists.proofprofile.net/proofs/artist/c1e9c47f-3a1b-43a3-ae91-4d676cb742db.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 0xc4027320b5a748574a3ad82926ace032ff0ae8212b1e7988bb752fb70f5573d8. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/DELJ82009003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88782802e4026b0c5dae36f985f5fcc37880505928b9f0203cd36d52162489b2. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DELJ82047027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0105a572c9571a7067bb52183be67b75c3e45f37d54900d8ae5c18a41c0eae18. 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/DEZC62021176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61da284b6dc5cd6e70a2992cf7f042345cf9e21c61592d164dd3f2c3aac71b0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEZC62157400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085ec20b8230f1f9a9659b281b7f06cc99fe1023b255d8c8c22ff23ae2995b3b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEZC62185889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51b46625935c139a57fb4ae388a51f4fe6b4361f108379ef29d30503815b6f5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEZC62101271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59d4fd1673b729da898aba2f542cd64cc07cad5c973712d4024e19199a652eb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEZC62117930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1043aec139701fe58888c4c795d496f70f98006411dc526023cef2c7c03b5f5b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEQ022280277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a6cab5da41f49a4c0d19bcaf34df5771e8eafe64f198906b915fd83e3983fb. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:15:18Z), 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/DEQ022281383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ca57abfe0d534bdd674755db6fb45c0b048c31f76dee787064567ec437ff5a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:47:22Z), 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/DEQ022380931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc38af0b5fa95049443301f5c9eafa612ffe966cfeabc6e5358e49f85bfbcf30. 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/DEQ022381650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb4bcb534211bf4c541604baedc80eee25f292bc4c0ae23dcd45caa9f2bf79c. 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/CH7812350077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf1cbf96b46d90d535e08657fc144d12f521ff2cd38c84426f34eb0fe7aa065. 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/FR10S2469280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a0e15b1a5d92dceb93b649397d1f8187dad517418973fcf74ccaeb5f57239f. 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/USANG2441921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957475b56cc854002aea62dc0a8e90253cdb0761f42cfb524a74d01edd6e5725. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CH7812526754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b54dc202400809b2a8a66d46a3425628dbfb4ec28e91c8ecaf07892cbba30e8. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/CH7812529035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b5fdfe7d9af014ca4ea00af8c316547edb12f3ed9cacb3ab88e8f40e72996f. 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/FRX762101679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd19a231f9a0b2db95dad1c503c145e0241203bd5b3e51dff6b090f3c03ac28. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEZC62298974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a0e15b1a5d92dceb93b649397d1f8187dad517418973fcf74ccaeb5f57239f. 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/USANG2441921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a6ecdd0928df4c5a637f581507a22c4c3d345f91ca7a38f0dba918d756a6b5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX762244473.
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 0x2a38e5930023ae7431239dc13096186f1ded42803b5f64045e75f6fa99c1da64. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEZC62298396.