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 0xf7ae46592c610c5b35567365e8ba5b9f2f3b107fa0a6db2ea5966e061a8ba973. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9c8320a-f8bf-4d21-89d5-ba01b3fb8bbb.json and https://artists.proofprofile.net/proofs/artist/d9c8320a-f8bf-4d21-89d5-ba01b3fb8bbb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Calming Binaural Nature: Creek Birds and Serene Waters
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 0x741cb5c9acf41aeebe96f39bc2437c604ff6a20782c2c3e8e1c09ac3ed09dc5f. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/NL8RL2458867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a90588a818aa8fc307aba4faebeb30f8fc65b43c72ff5382fc0bdc2ac5b803. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NL8RL2501516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032c7497f942bea3d51320815fba78bf090074c9b8dd2a043be4e7a9fdfe9c52. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NL8RL2501517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ae58f23ae41397d07184bd1e91cc710ab25181f26d8088c33ba2ec42e365fa. 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/NL8RL2501518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506b81748c49e7ad9a5bc9aa6e9d686b9cd7d5add93ad0010854a3e870cc1bf1. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NL8RL2501519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ab69623285cd4f6bbc642d2e78977f8bc653b0ea5d71a905ca25ee556cf18b. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/NL8RL2501520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25716bd0ffad3da5892b0bcc679bf3852426f7d98a08e6436c0f282265872b9. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/NL8RL2501521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918835cd5a1d9fd7549f6a8832fc780b130fc3d20980c2f7b9620382da35b28f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NL8RL2501522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fcc71dbaed5bac1fb089319593778b2623a5374644f61b85e31ddd8031ca72. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NL8RL2501523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fb5e85f51a6fc5ad958a97dd9946afe5245cdc35f770d11f2395d123548bd1. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/NL8RL2501524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496897070a444bc1e9294e7d4719caec895fd7ded588e3fe019f1eec47850266. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/NL8RL2501525.