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 0x944c216ec9dd62c360ae5ead0327fe1fd6aa0981410c6df693adf92ad0f34bc7. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a413c87d-94cf-4ec8-8082-f614a3b34df3.json and https://artists.proofprofile.net/proofs/artist/a413c87d-94cf-4ec8-8082-f614a3b34df3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ronald Binge: The Watermill/ Scottish Rhapsody
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 0x46b688e14795aeef7d070bf9c34107d51a9bd944927cdebe82942b98967e28ba. 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/HKI199412101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c3866de987aef2fcc7080c4727ef2c064c22221f25c2d268d7b08385633e5a. 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/HKI199412102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b71af1af29160eab4856715b9c68dc422bebad754c5466483f4481373601944. 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/HKI199412103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56f5a97457ae8a700f86af2b2f69d1dd7340ecd3647680396b04c720606fe3d. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/HKI199412104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c008b39b65244b5d421e83ac930c2d56b1bf058488880314f5ae56722a1b410. 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/HKI199412105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9681b3d173ad57ef62ea4705aca36786fbd584ea3ef2e2300a42f224e4d44ada. 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/HKI199412106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c23a6dde5c31bbf3b2c2acaa384b28b97ee2926e8e395c40769e442fb72028. 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/HKI199412107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce9602900f555632c8885360b142d3a478bb60c03293a197a8db8fe1b86196e. 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/HKI199412109.
Saxophone Concerto: I. Allegro Spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee216ab9948f8c58dc1232051896dc0705c2f26c35778bdd3b4b0f3da8d5650c. 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/HKI199412110.
Saxophone Concerto: II. Andante Espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b666ce36c0dd8832953eb6c9264cafc4f063bec3a1cf23f65baf0aee3302c2. 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/HKI199412111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5636ceb388948e27753399945261c7a6da8aa4b7433e30dee930e242c457d7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKI199412113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b7f848c372df7b01b63c919f56f32b31f4f882544746ec3bb4ab97c37b65f9. 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/HKI199412115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454ed30062b6215046232f62217cf6719dc63ce6c2320fd1927b74bc89b3a62a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKI199412117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b616fa445e8285802658404200dba47b060f1432aab8d18dbbc634b315cff3f. 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/HKI199412118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e803502165c9d0ea0550cbd34cbdac5e4a53098588e14cbddc131adefd2a79. 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/HKI199412119.
Binge: Watermill (The) / Scottish Rhapsody
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454ed30062b6215046232f62217cf6719dc63ce6c2320fd1927b74bc89b3a62a. 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/HKI199412117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338dafae8b41178e76d153898290322b17a06aaad1fbd67e4a9513ad0e038c69. 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/HKI199827012.