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 0xd3a50770c4b1bee9426b224edf5b745b951a8971dffafb7f0be993f5e59591ff. Chain 2 (Bitcoin): anchored in block 953854 (2026-06-15T23:16:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02878764-0f2b-4ea8-bbfd-2bdad5a3f99f.json and https://artists.proofprofile.net/proofs/artist/02878764-0f2b-4ea8-bbfd-2bdad5a3f99f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Al Sahm al Taéh (After Mozart's "Soave sia il vento" from Così fan tutte, K. 588)
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 0xe0c397a2b531dabaaacef9bc2804e44914546b753fc137c2fb1e6c2322e6ec4f. 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/FR34F0500040.
Mozart l'Égyptien (After Mozart's Così fan tutte, K. 588)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ec5ec0c0b9da801d3a833d6faae1b16fb47a7c6a86445e7bd0761f1f20af1f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR34F0500030.
La reine des mille et une nuits (After Mozart's The Magic Flute, K. 620)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bab8a60550a0b3c647bfaf77ad3791fb51de2261204a3bbe4402346d6f60561. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FR34F0500120.
Ya Shady Symphony (After Mozart's Symphony No. 40, K. 550)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be7f89065e96882a78138f89a723be97c865e356272e06f70c27c197f64f615. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR34F0500100.
Al Raqs (After Mozart's Symphony No. 40, K. 550)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6c35635979272d6e5c45438dff1479843cc1fd352f34d1f5b6f29a667fc566. 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/FR34F0500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be7f89065e96882a78138f89a723be97c865e356272e06f70c27c197f64f615. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR34F0500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bab8a60550a0b3c647bfaf77ad3791fb51de2261204a3bbe4402346d6f60561. 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/FR34F0500120.
Le quintette d'Alexandrie (After Mozart's Clarinet Quintet, K. 581)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d34bbc9bef11aace42bcee46a2e9ab500e976ce1e22c2233b8203135933e0c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR34F0500110.
La querelle au sérail (After Mozart's "Marten aller Arten" from The Abduction from the Seraglio, K. 384)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686425a1db5f38edca101e6de2db5d872574b60b3e6d020f433790a10ed5b67f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FR34F0500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bab8a60550a0b3c647bfaf77ad3791fb51de2261204a3bbe4402346d6f60561. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR34F0500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bab8a60550a0b3c647bfaf77ad3791fb51de2261204a3bbe4402346d6f60561. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/FR34F0500120.
Classics Reframed - Bach, Vivaldi & Mozart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c397a2b531dabaaacef9bc2804e44914546b753fc137c2fb1e6c2322e6ec4f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR34F0500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be7f89065e96882a78138f89a723be97c865e356272e06f70c27c197f64f615. 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/FR34F0500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bab8a60550a0b3c647bfaf77ad3791fb51de2261204a3bbe4402346d6f60561. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR34F0500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686425a1db5f38edca101e6de2db5d872574b60b3e6d020f433790a10ed5b67f. 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/FR34F0500020.