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 0x5da2ec05f2f2fab07ec249904a7f761ce47359685bf1339d989a63e9d4c39e51. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/234adaeb-7680-48aa-bacf-c80f6c0e36f3.json and https://artists.proofprofile.net/proofs/artist/234adaeb-7680-48aa-bacf-c80f6c0e36f3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
PRELUDE SUITE EN Am: PRELUDE SUITE EN Am
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 0xf08595bed4a95375921d9e979e103ed3ae0985beafbcd6631d227b36bfb1d041. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/ESA092414890.
ALLEMANDE SUITE EN Am: ALLEMANDE SUITE EN Am
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf150abd967d71ba16b3ed35632b3073de0a6bd4ec5dccd08477bcf38c6730369. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ESA092414891.
SARABANDE SUITE EN Am: SARABANDE SUITE EN Am
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc348ad925376d2881c58a1fd6b54bf4f179767b5b50dae8d2c78e19a5a3f8fd4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ESA092414892.
GAVOTTE SUITE EN Am: GAVOTTE SUITE EN Am
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b48fe09d45af4c04f40a119c7898d5ca3f40bad6b1b74f233ff37fa87fe88e7. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/ESA092414893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf73ebc09db5ac7ef4b02db5278a91825e52ea2c3d5683cf824807ed4d1cc4e. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/ESA092414894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a6549d192b84adeb5e0d67a77b08588cdac89f33e272267d40d76a3aa05c00. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ESA092414895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9504499cf612e7e44bd6b9de353cfd5cf0cfcc1dd1e6133736a7919b00d5b2a7. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/ESA092414896.
ALLEMANDE SUITE EN D: ALLEMANDE SUITE EN D
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9615a95e95e79dded19091b6ab7145f971df77424e60688b5d79ebda30c6f140. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESA092414897.
COURANTE SUITE EN D: COURANTE SUITE EN D
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6b9cfb8dbd4859be5fc3919ff45db771916622fbe18ff6fcb98badeaa5e9c7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ESA092414898.
SARABANDE SUITE EN D: SARABANDE SUITE EN D
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289cd4acc1f8d63c6c3362e73a6de981005a3b60fee66eb4282d7a1f5aba30f8. 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/ESA092414899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a60b6a228329a965adae4c9b8ccd44c80d969ec3b72c4a6ae4ee5a507b7be1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ESA092414900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8892dff33a87511e1ece4af6c8f5634c68c76683fe01371428e4824ef50859df. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/ESA092414901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab62a546815a8246cf00a7fcda891b3d41a7be693de2e89acf74ee61bb2d11b. 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/ESA092414902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98a8b349a996f14d322dd662ed4337ea7b87ef5dfcb27d82f733824e262f007. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ESA092414903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48be15ef7e523839c897758d3ca5686d2a0093eb7d1b97498aba6fb02a840f0e. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/ESA092414904.
VARIACIONES SOBRE EL TEMA AMAZING GRACE: VARIACIONES SOBRE EL TEMA AMAZING GRACE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e6c5f8434f6694daa3e93bb8697756680565d3ee9aaa37f5404a7b0c90779e. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/ESA092414905.