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 0x68c36a3ce353b9e283bf7f99b700678e639e1b8f4b6674625d2ba445017c8e4a. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/adbb461a-9afb-4f19-9855-bb9c45b9e984.json and https://artists.proofprofile.net/proofs/artist/adbb461a-9afb-4f19-9855-bb9c45b9e984.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 0x5568fdb3ffe90c59be815bc7cd81152f20b1dd93834990ac2a4c8a361f7155e7. 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/LVL152200220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdcd1e55883fc8e1de038d0152be2c4a4af04fd651bac09592e0aa193c4b8e1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/LVL152200218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c969de50998775e0697d52461b190dd5d88039863a501dbe6d52ddc64d4c496. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/LVL152200217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e6afd743391afddeca1a44f410d7b89bb7abb75fcf7d87c9fbdce21324d9cd. 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/LVL152200215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6886bd2cbf5ba0426edabe49dd8ba73ea62e3288210be7572dc49f5ad8d3c7. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/LVL152200214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee6225fe935ed892677e505e02a8d634537039527134ffbc695aa7f0cb68fb1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/LVL152200206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a938463b5a2ea73663b9c0712ec1c1efa9c710eaa5b3bc861d92b854583c3fa. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/LVL152200204.
Native Music 15: Traditional, Folk, World-Music, Latvia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b2005bf0411779e7b88a566bd2bac420ec4ec40a1330c941b4c66280f014b9. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/LVL151902529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43c27de8dae5d8ba36c2015e2cf82ae76e0dc119d46713e1211c6519d2bca51. 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/LVL151904922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366ff5f812eeb4c3da5445156001ebc0dd65ea1068ed5a40f7ebbaf14e3c7f67. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBSMU8053390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83239e0031feb6b1f8e951239eb50e6d7ec1ccf3a098339aa552e87e9d4f936a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU8053391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5aa7b1c1438e9d023eee2243cb8d8cb1373e59e68ec4b7aa7a1bb37018ff15. 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/GBSMU8053393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc867a8372b21117206f47d8a967da9777372add26e48f7210c88a05191e91e76. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBSMU8053394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2893f580fa0920cdf3ef5eda668e9418ec42e599102f3965ab6715ceb1a0e1. 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/QZNWV2420609.