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 0x4e79b6c37b977329e3d93fe896da480899706e5f6c6be4170878d64d3e22731c. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d449c3b-1212-4716-81e5-902704aee691.json and https://artists.proofprofile.net/proofs/artist/1d449c3b-1212-4716-81e5-902704aee691.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 0x030c919887f725099be14a0a6b0cbbf699477f64aa873c858bee1f0516c45232. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZFZ32011864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51b3834aa94240a1ccf178ecdc4a36ae38a435af9b5053ca34b312d3f1927fa. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:21:16Z), 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/QZFZ32011865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb663752843548f3058f43db82d00287908232807f3822a48909e9cfc0b509e. 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/QZK6P1957540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1e8a55fbc6ad7aba31a12617c69f920d358da25c5ab014326cfeea82825f3c. 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/USLZJ1539295.
Disarticulated Space Clown - Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5805a79296bf82099b2b6813e57c5e4fdf7ced9550a20de6aeb7324d07e5d806. 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/USLZJ1539294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7762418222051ad0193106a35479c5cdf03eb613729dd0c19333c92e81d0ad. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USLZJ1539293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec33fcc0a1d73c3439693b5ef2de99a934c52223c75060dcacb030b75df984c2. 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/USLZJ1539323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b6fc25c63caa9ec206a03a75a445dd320af3e600e0ef51d078cd318b2539ae. 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/USLZJ1539298.
A Duck on a Sheep Playing Violin - Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c563d6464fb18813e7e4c873a48433153538c76ed0c96b131f97847ded4732b. 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/USLZJ1539297.
Fermented Orchestra (feat. Terrafractyl) - Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1112d8672ad6a774a99a9e10686257c07b3a3029326142362607c4a86b4eefcf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USLZJ1405699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9654a7297074cd1dadc9ae422304f594c21cdd658dfa02464586cb5a28a65c1f. 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/QZPLR2034778.