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 0xda900eccd9af1be7adc0507dfec35fa8c080e83e11a39513458631b70fd4425c. 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/16faca16-5ad5-48b1-8c92-5d167e352043.json and https://artists.proofprofile.net/proofs/artist/16faca16-5ad5-48b1-8c92-5d167e352043.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 0x6c6b0622249f8ae75c403b72e4837ca084f0e6694438f2c2120c4418129d7728. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBKPL1560919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27470b9c7b0637fc0a9e9b459bae2bfbfe305e67fa7976afc23ab42ce89f4faf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBKPL1561154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e677e9e9491abae200f45c0f0b55489e5be16d4be86c87ff72e5897e4f7bd22. 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/QMEU31705402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9315c3bf19377a59379d27e797f26be3acc90855b8449934c970e33a9f8522de. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QMEU31705400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212687b173f17e6f1d65b253351e13bc81d19a8bde6475c11dbdbba3fd06c8dd. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QMEU31705394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f27785e45058e7853709142f5f082f7671e5496c07471da7f91d0e2caa732a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GBKPL1971633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe7ce1276476468c06eb3be2d80bb725517a60d6e9206ede2b23115f9c026cf. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GBKPL1971636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e3bfc80188fe0175bb696c059cdb4e2a1cddbee06502d524bbb0c772742ef9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QMFME2257112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5569e5acbf17b4a92aeef137a37a40276eddc05b073427a6efbba46830cf03f3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMPKX1886639.
These Scars (feat. Future and Guordan Banks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20180e5137d36ef228d69c7421b3c47cf32fcf74994ab767c99ea5c546588457. 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/USAT21702439.
Two Wrongs (feat. Guordan Banks & Pusha T)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22469fe16f137540c75492e36f10b4bcac01bfd69e5e517c4cd5efa6c3d48c61. 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/USAT21603046.
To Whom it May Concern (feat. Cam'ron, Guordan Banks, Benny the Butcher & Conway the Machine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2194b5f4a459587c9cbf5ff27b45e84348474510135fe54174845805cc4b7fc8. 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/USUYG1255757.
Insecure: Music from the HBO Original Series
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6b0622249f8ae75c403b72e4837ca084f0e6694438f2c2120c4418129d7728. 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/GBKPL1560919.