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 0x214a8b9f0ba658c57e7514f120ba03f3cf610427be60e028c0d1c8cb404ba638. 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/c478559b-bdba-487b-a71c-e0fc9489f166.json and https://artists.proofprofile.net/proofs/artist/c478559b-bdba-487b-a71c-e0fc9489f166.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 0x2b26e0073609649f2b83bf4e98c8d5f79bf91ed39accadf9edd01f66d3afb009. 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/CH3131914983.
Blue Harbour (Around the World in 60 Minutes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34b025ba1e6d4fbf832a5d18a78b700636a7b2f42d06b9708c123b2741f4528. 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/CH3132419622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7662410f095f640d769360da8d0da0922feed4a60799e8f811b1afd87bf90d. 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/CH3132419623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbb6632f98df0aef736fd0679611fa1a8af491d78f436034aeab4391973b8b0. 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/CH3132419510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164eef2190f10cf50720d73c6b2674be4c5893d8803774c2f657f0bdeb708ddd. 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/CH3132419511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a01b794a87b2cda2ec45891de82062d89eef4daa7539ea0d46c8d59bb4b85a1. 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/CH3132318865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefe636aea0fde600118c4597ceaa1960cdb9a5461130c85126c629b36e1041a. 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/CH3132318867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecd2cd37c4152a1138ff60f964417686f15bf399df6c9728051bdf0aca72846. 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/CH3132318858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79b19c95003988d7d4dc22bc76ec420d25e0f6935bbf61ccebaa7366a9b155d. 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/CH3132318711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbfffae949199fe57f2d14fb9cb7f0122b888681e2c12b0292080e5b9649d8f. 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/CH3132318382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92d61529f3655c848ad8f566b21ea73dd456e1b15991c07d537a9ef75eff808. 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/CH3132317948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36b683bad6fe83a3a0a1852ffd99b6dfa056569a64ff7105824cb33ee057d39. 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/CH3132317844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5792c911157f49acf6c54fdf6bb23c6cea044b27bebfef4eb1dfd21bc95918b5. 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/CH3132317845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1740a6ac73dba8954c3a4df035f4f19547c1d532c6f4792d27656f95ca71b0fe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH3132217497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169f49476ea6af667a79c965f0972e14a9e1fb28c541e4e608bdac7e10a63ccf. 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/CH3132217496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fbeb166f33bde6a34e3912c816b79abab56e6486482ce3d6a408d1c1124bec. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/CH3132217399.
The Future Is Intelligent (Daniel Portman Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64d767e69c172c6a1b55c8726ee26b0e620692bd766f19ce9542dd84db18e10. 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/CH3132216924.
The Old Lady Who Waits for the Days to Go By
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7413d2aff0f1096c467cf9e81e06e1bab4ce25b765d7a9629ce6442fc5a2c44c. 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/CH3132216457.