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 0x85b78431d4267fd33562cb5ff4baf8e42f3c27d948202a78791a67861d076642. 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/cc2042e7-c948-4591-b3c5-17b308d0f2db.json and https://artists.proofprofile.net/proofs/artist/cc2042e7-c948-4591-b3c5-17b308d0f2db.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 0x84a9b94d1741517c337a3bfe70ad5f22e7bec5b1592be07cf99a786649a3983d. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:32:26Z), 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/TR4020902295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21d6f2b3a83e29a12cb88169626c9b2c58711962746f2380fb2177c284532c9. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TR1232400601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d5c1552c7936381ed7601f4db18a7c8c9a997be5583291ef00cad4b94a4090. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/TR1232400602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2f6015197a26c575cfe37514b6a03c672f5012f4d16910a84bce5a794e6d20. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TR1232400604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b45f41eaaaed236b62fdbe5b8fa5b973f810be6f7423455ad8fa8d3396d67d. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/TR1232400605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa9bf564dc4d06fc02144745b332b1519c51987fdb24157251f4a18b355b70d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR1232400607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6885df21f4cdf57b87904a09f11cca4f889823c47dad604c185ccf51629081c. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/TR1232400608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bfe4705e88b7fb80efc48da45f49661eeafe8b1e92eec1011196a0a6132520. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TR0490600184.
Musical Letter (feat. Ilham Gencer & Ipek Dinc)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec7e84022ca5f5747552da10054e8332cfd2bd45383fac4c6f5901c35e44584. 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/TRA161500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1db00c85cc573a3b973517f3b80ee07a74d944fb4d3b17d53d52c0cd80dd6b. 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/TR0490600165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17d9e6f3d884fe42426e00bedbc2b3160540b1326e3c9e1f46e3560e534b97a. 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/TR0490700606.