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 0x1d0e7db84e5a77a1686a374650fee0677f0795fdc095146852cd42f9fa9c0cae. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce5d4973-dbd1-4c74-b14d-e302a877b18e.json and https://artists.proofprofile.net/proofs/artist/ce5d4973-dbd1-4c74-b14d-e302a877b18e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xa76b91ffe25b2ff0224e714c53e0fa503615d0f251e3dfca68165b7e9fb6d50f. 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/QM4TX1503587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d23fa0d2efeaeda26c8b29cb95775a27794f6ce7b46ff5483d3b9e27c442c0. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QM4TX1503589.
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 0xd88ecd37fdc23b9fc8fd5f8f8bae8bff0bbf532521399417cc858eae15ee6aa7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM4TX1503593.
Vavilov: Ave Maria (Formerly Attributed to Giulio Caccini, Arr. for Piano Solo)
Ave Maria (Arr. P. Breiner for Orchestra)
Ave Maria (Arr. Alex Palmer) - Live At St Francis of Assisi Church, Paddington, Sydney, 2016
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0964fbae5de4c98d381cd1bc08a42e35ba7fb68e3e931f91c2814ffc1a227ecb. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:53:03Z), 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/AUAB01750401.
Frère André, un homme de prière: musique pour la réflexion et la méditation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cc0987bf6a318b7d3f199ed132ce23873a6816ce26675be10d821d34e8e5d3. 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/CADC41412234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d19c9625973e8f58f536ea1f35d11c287bdce0437b1432c1dacbcb87d27baa. 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/DEN961304950.
Ave Maria (Arr. Cullen for Cello and Orchestra)
Gentle Dreams: The Best of Julian Lloyd Webber
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29087baaf56a89b4ac06154979633cb4a704700c78be10202d371f1d0cd055a5. 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/NLA509708208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d19c9625973e8f58f536ea1f35d11c287bdce0437b1432c1dacbcb87d27baa. 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/DEN961304950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29087baaf56a89b4ac06154979633cb4a704700c78be10202d371f1d0cd055a5. 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/NLA509708208.
Lotus Moon - Chinese Folk and Art Songs, Opera Arias
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb7ad9a1768824031f8b3699ad5a524460fedd15e5afc2395a89dd5dfb509fd. 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/AUAB00150036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fbe4742aa4bf5818fa464559b48417c14017affa3723405186cbeb55266093. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ200004030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c0c6d53aaeefeb65e4a7924fe4eb085ef7c59ef29ae7e7c2b018e56f54484f. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/AUAB00650014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c6aa52579ddc391656043f15bf87295129d914c4d6b99576701d75525782bb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/AUAB00350060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55882f5691485dbfda82b470099a334f433847425968a09e1ec6ae9ad559496c. 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/USSM11203367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0def178964e021324fe3c015eb0543ae8514336e0cbb35b177ae99d14e84539a. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZDSS1900115.