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 0xe7d385ffdf8ea276bfcd024d1893fe8dde862ab0f60dcd57289ce34ef1b25238. 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/05bd6ce5-6bf5-45e6-bb41-871bfd1e7b2f.json and https://artists.proofprofile.net/proofs/artist/05bd6ce5-6bf5-45e6-bb41-871bfd1e7b2f.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 0x7978e28f0a1ab430e3ce40019c6401f03f32553f45de919723006dd9e11ddf48. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/CH3130710146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e93701beaca0fe3d7e2b9d045538a7a1bf439929065c8d7800e39d09f006f88. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/NLF711000239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec30bf583eac75a11d4545e40bc9c3b9a4eb736cd58a7cb339386daba3d2d883. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLF711001070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9499c62bee4324674535515fe7f765afa8bd7e2b552609c75fb6e419726c6d3. 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/NLF711001117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78028b41aaacb44429b347ded82b9f804033c3f98a915e58fd1c7523e5d5238. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLF711000915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8ca4ca399cdfd12be1d154f9e600ab3672c07ea12719a28756c2e3753438e2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CH3131000242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78028b41aaacb44429b347ded82b9f804033c3f98a915e58fd1c7523e5d5238. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLF711000915.
The Divine Circle (Extended Versions & Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1914a529e08e5c220afe32be2bc167393573082fb0e069bb1986c78438acfff. 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/CH3131000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bc2d010f7b3ff8287ce1ba1ee95c176bb6cca61663a91b0806798c7b46db15. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NLF711102278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf62ae612f73740b610c8af61f1e92a8799daa68b684737617c6faee13cfafeb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/NLF711104013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b15a11a6fbf3454ff2cbcff1a220ae37fe6eaefbe77e287a92f98a36c2ca1b. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/CH3132419524.
No Xcuses - The Violet Edition (Unmixed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77eba001665607e709f572405f2b6569ad67e5c22d3e5a731de4225ba608431d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLF711001700.
Armada Lounge, Vol. 5 (The Best Downtempo Songs For Your Listening Pleasure)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cc2936545e3e13aa0c1e7b5787d072adc322bac98821159dff3554fba8d639. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLF711204169.