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 0x1ffe35a2f483be83eaab2c461d7fe76c803d12de107b1e312d7e50e67e8b4b79. 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/33831828-98d4-452b-a68a-3c9efd0cbbba.json and https://artists.proofprofile.net/proofs/artist/33831828-98d4-452b-a68a-3c9efd0cbbba.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 0xc8db406252a0c8162a9d8e5f61ee7ae763d3b013c5b52be58a83be16da329ef6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWW2394214.
Nguwe (feat. Ndoni, Fey M, CHARLOTTE LYF, Upfront)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c73156610a991ee6d79ff3899a014b38996dbaab05f6e059bbad36e35d2c1ad. 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/ZA56E2303306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef93e18fe9df9e1990b8ffe3f994577043a874c7a107668d0dbc560c37ec0ed. 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/GX53U2069964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dd57f6f56ae0a1da3e0610a5f3017cc787fca3d8ba52be5d5c83736b8745fb. 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/GX3Q92474683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa418c24bb2c007dc6c26ab8508eb9cd40339944d17cf4996dbe96186ac0a320a. 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/ZA56E2303972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79420e347d4e796c4f4213bb6cbd60482d4272839c427fb26c1a8ff6496f1c0d. 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/GBLFP2498808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cd9b3c426cc7e61697158ed41b091d5693e6ae69e18ec4aee91e480fde790d. 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/GBLFP2498809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f35810f1fde6320bc7659a22850ba5ba94eeb5ff5f06b32c57822f4f468b5a. 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/GBLFP2498810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741d070f784b6ba2da93bee95c124739a51f638d50e540f38d6a4570afcbc29b. 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/GBLFP2498812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e714d87938992f927d4e3c661a0f8e160d9c30c188664f5eb60a3d26d2a383. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:42:01Z), 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/GBLFP2498813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0248172d6d1a540b79c9f6fdca7c29306787b7f8b7c57cf9e0fa7384990d6c4. 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/GBLFP2498814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee1824300735a5989b108e46f6a5f2b9e0ebc3e3fe1f436d116c5182a0909f8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2498815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976a946a519aadc94ffb616ee346c182ded3fac9a4df97e61fa919a931a2287e. 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/GBLFP2498816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c4853799071c6d9fd2a72806e6aece39c814fc6b843d9d96150f9bd0a91e3a. 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/GBLFP2498818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82511a9c87d33b6ce3a08b2c3a882a51edcecdf747948f2cec937eef79f0568. 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/GBLFP2498819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4c103c10aa358e73b1cd143b96396ba92626250b32703002a6a53d8ff8c4a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2498821.