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 0x50d17809d2f3ae2de6b7a43b2829177c72cf0d880d8faefc206961ffb8d62b3d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27b7750c-1bd8-4b9c-a161-a827e919791b.json and https://artists.proofprofile.net/proofs/artist/27b7750c-1bd8-4b9c-a161-a827e919791b.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 0xfa66e211d763bcbc9d2e2b196f3a232c50d7c6d95aedee6482410679f014ef29. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:14:36Z), 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/TCAAU1173228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b9e5b45544f242fa34a368d23d303608fdde245613c3198ec2665b629087e6. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAAU1173232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2768a0751ffd39b7ef5ecaf6532338f56c97bd1169daafee5b49897a0d131b13. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAAU1173234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2bc9b9099078f89a74527bfaa24366206547c4afde8fe5b02d4e22a8d4306d. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCAAU1173235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d76d88f853da35a89ece50ce70b3fa38e5adedd646d4641b896795fcfca163. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAAW1175863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03db65bb99372871daf511b3ba550f1674432bb308d394f58bdf76d9acbe2b09. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAAW1175870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273d1aa706fc47efa3947f537f238d06768e9e351190104a4a4d1dce6290d3ce. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCACJ1570123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f1f94aac9af751cda1c76e5a1be28c1cf8d1bd938e5ce8b3a471bb911df44e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCADF1798570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec46f5d45f5a39e11df524dab9ed7d25fc09386e23a4285df9ac4f5cae24a904. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCADF1798572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeac809764fdcbfaabf789d1a01b56d205266e7265e0262d1f8b1dcb5338a648. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:03:39Z), 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/TCADF1798574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb3ce81e1691d20bfe3d2e9f01147290b45d6461cf3c8ed1588d91e8abb566e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:50:06Z), 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/TCADF1798578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121a6bea75db1bf6431dee6794b3ee5d19159628e467a9960adca160691045f5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJL2523758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e7550738fbdf706778be9b3b5dadd6618f3799e18fd64cfb3586e3049b7868. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJL2523785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1c8e4b06c1a0997326de5fa0a51b94bae8effedeabf79d65974089c99cadb1. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCAJL2523792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2725472c10b978052a0b7b25aa069c9469adea38db3651ecccb91237d44dd8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJL2523812.