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 0x61dc28cabf2fe6f63acfe9ce68a97e3afbfec69e654b9aa595d8a3b85b89f554. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29704d3b-6247-4c1b-abc1-5cd719207c84.json and https://artists.proofprofile.net/proofs/artist/29704d3b-6247-4c1b-abc1-5cd719207c84.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Reet Petite - New Music for Flexible Instrumentation - Demo Tracks 2016-2017
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 0xf456a6c5d0a29f36d34afd51a7511c68377abd1241a4047813c16bdf53ffa093. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NODGN1607140.
Tie a Yellow Ribbon Round the Ole' Oak Tree
Lime Tree Islet - New Music for Flexible Instrumentation - Demo Tracks 2017-2018
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c1a309343113b2d24db8c7e2ae77264474e647353edacf9d3674b9b73326b5. 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/NODGN1705080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279f20a0b8137cd64b2d8ba4cbe620f7dd7a0c4835fad1315b9e38c52fccd9e9. 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/NODGN1705120.
Gill Bay - New Music for Flexible Instrumentation - Demo Tracks 2018-2019
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445a8968050005b78cc420a80d29d7a527988046bba1c7ab186f8d122f15bfa1. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/NODGN1808050.
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
A Walk in the Black Forest (Schwarzwaldfahrt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0767c7fc2d121b4db28a39f95008b7e55d3e1f13e0c9f3b01b693cafe2a20cf2. 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/NODGN1607090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7d34d310f37abbfa5bbf4814e9c49a69de4ddfda3cc8700f08bd816615b851. 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/NODGN1607110.
Quizas, Quizas, Quizas (Perhaps, Perhaps, Perhaps)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5de2e3d726824f32ed34ebf82bbf47e983b0764915925580a9d18b8ea2d6f9. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NODGN1705090.