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 0x28e5e1da23b9b8ca85dbd33b1e040a62e00d0fdead3f3ce167a23ae43ae44e6c. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/170e4829-527d-43ba-bee9-61cc5f8cde12.json and https://artists.proofprofile.net/proofs/artist/170e4829-527d-43ba-bee9-61cc5f8cde12.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carmen / Act 1: L'amour est un oiseau rebelle (Havanaise)
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 0x9870c544d772ca1527d62e0b3bfdcaed9d3232eb149b40ef7e043584e2fa2d43. 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/GBBBA7050042.
In a Monastery Garden: The Immortal Works of Albert Ketèlbey
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7112c059d24549a377efd82ee84c0cf53ff14a9188d1b18b0dcc0576ff5c5657. 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/GBF076910480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd0d6e7ff0501bc54ccc2507c9e73501b0903fab74d8a9c3203b6978b497ba1. 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/GBF076911711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e8910c6f033d5e216f02c8a0bb6d7c57b0b2ac2c3f1ee8b1a746d9e61bd3f8. 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/GBF076911714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe148014e16ca2b8cc4bf08c77e9d8e6511507ff824baeba73b05c3de5427b007. 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/GBF076911718.
Je n'aime toujours pas le classique, mais ça j'aime bien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89f5bf42fcb28a27df8fb1398acad7488daccdb8d8724f667bc2f07d6ed7897. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USBC15900201.
Ich mag immer noch keine Klassik, aber das gefällt mir gut!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89f5bf42fcb28a27df8fb1398acad7488daccdb8d8724f667bc2f07d6ed7897. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USBC15900201.
Messiah, HWV 56: Part II, Scene 7: Hallelujah
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9101a8b7149619f9595d25b98a56029910834431d041593cf42551047f388d. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USBC15900279.
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 0xb9db171b6fae499a8c0758e3d9f02315457c2524ba3a62878a9abf28405a72b3. 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/GBF076911712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d89ef51a326c0071da454d5be08e89a7c2055b8ded2a899e5f8610e0123947. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBF076911713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d51465bf11cac0b1df1740de99e66f6cb18ab17725e70d608089d624a7c5d8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBF076911715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f5f3327a24a158c31d11ab04c8d81b1c0fa8ba4d193dbd5ac20e8fac9fe19f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBF076911717.