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 0xbce14403906a66197c536ed4faf4f39d6bcf92c5fc7c2625f475c9b341a77248. 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/a5297b9a-2c6f-409f-aafa-2382bf75a850.json and https://artists.proofprofile.net/proofs/artist/a5297b9a-2c6f-409f-aafa-2382bf75a850.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stabat Mater Op. 138: II. Quis est homo, qui non fleret
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 0x80c9d98efdbfc9130f1c72a038919ed19f5c977060c93c622be33b6039abe55e. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/DEAD62148511.
Stabat Mater Op. 138: III. Eja mater, fons amoris!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e5ea846d1c5a234fd8d661811731bfcdd8a64702da692023f7b3cf7342b721. 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/DEAD62148512.
Stabat Mater Op. 138: IV. Virgo virginum praeclara
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6894be6d589779f7c87ae1add060249d4f26f9a8663579cfbbea9306f57f8766. 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/DEAD62148513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704664c1b88d18e88354ba385e66e2d1485d3fb5ae9146e268f3e01731218cf2. 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/DEAD62148514.
Stabat Mater Op. 138: I. Stabat mater dolorosa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b26ddc7c50d503a6e674ab7353d77b0b77770ad2fbb8bb524d35b2aacc8922. 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/DEAD62148510.
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
Handel: Messiah, HWV 56 (Sung in German) [Live]
Mass in D for soloists, chorus, orchestra and organ: Gloria
Württembergische Philharmonie Reutlingen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b347a3ae7c579c7e79f8ec8e321c3e90dcb0eaf89f16f620757c6ce465cec2. 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/DEH089700025.
Mass in D for soloists, chorus, orchestra and organ: Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88867f697bd14cbfce6ea477e03b79df9b0908ddc8f0976d101efb415c45e31. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEH089700020.
Mass in D for soloists, chorus, orchestra and organ: Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b73acf816b1725f27ef1ff32df62aaae46dcdbcd3f32c66952e9881f64b08e. 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/DEH089700021.
Mass in D for soloists, chorus, orchestra and organ: Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a78d379f79c74c8abd369b35ddab3f1c132272782cab754dfe4a6cd41d60ab. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEH089700022.
Mass in D for soloists, chorus, orchestra and organ: Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b992d4be53d4388d5518266906c35a3c13298d88e2531c3aa1edf301d17e789. 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/DEH089700023.
Mass in D for soloists, chorus, orchestra and organ: Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe669cedbd04462d46b53159b3e13a638abf9c91b249295c3465c549041652a88. 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/DEH089700024.
Les Sirenes (1911) Pour Mezzo-Soprano, Choeur Et Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9153da666c186a065ec1a2359912c2cc6f55b64f3673f90fca851ac55f06c5. 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/FR48T0015008.
Mozart, Beethoven & Others: Orchestral Works (Remastered 2023) [Live]