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 0x1273ba8bb3fe30a0be762aa9e85af2ba981923e7d5a2033e561922741194cdda. 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/7c4e3efa-f5bb-4448-a739-fa49bae551dc.json and https://artists.proofprofile.net/proofs/artist/7c4e3efa-f5bb-4448-a739-fa49bae551dc.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 0xee7e491aab507d7b05de46a529a96e10126ba7bcc396031a4e083692cc9a40a2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TRA161900490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5758abd14e670d6acd1bbbb93c417542aea3b95374c19a64e62a33fb9ec2dfd9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TRA161900493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95cf1981dd76f95d181480627763216976169c68073dd127f50bdcea64efbb4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:56:14Z), 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/TRA162100766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea1085b4b8dadf4932f76f5ed02517becab8a71f86c6fb21f740722c4f66491. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TRA162200711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0a791376fcd78bc8ae8c18585acadbc514e1563af39d0c4972da22806e4069. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TRA162300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe092a5c74a19a66b22f42278890db798fe6a8fc1d397dbdc3782613228f32715. 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/TRA162300650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95cf1981dd76f95d181480627763216976169c68073dd127f50bdcea64efbb4. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:52:53Z), 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/TRA162100766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdbc9e000766c6dced072c9e7c60770174254574f65d72ee0a8b8b1b00bc426. 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/TR0242300033.
Kimler Geldi Kimler Geçti, Vol. 2 (Fikret Şeneş Şarkıları)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b07fc79e369fba52187d42284a7f06a459842717d4a80da21c04f11e3cc23a5. 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/TRAZK1900065.