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 0x7a358f0204d159035fdf8d293e3cbaacea8eeee496a8b8c303386819c091d8a8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73822c12-3ea2-4f1e-9d45-a33153e6ecc9.json and https://artists.proofprofile.net/proofs/artist/73822c12-3ea2-4f1e-9d45-a33153e6ecc9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Violin and Classical Guitar Wedding Ceremony Music In Baroque, Renaissance And Romantic Styles
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 0x1405e78ae53831e310128e968da520c5140d04ae597bef4b10b2a2c1704b2b10. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:33:50Z), 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/USHM21190240.
Ground in Gamut for harpsichord in G major, Z. 645
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7da792447cc8a0012e5ab0d71e4fd5c3c6ff90ca56367151203e79ec5ac1fd2. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USHM21190241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caaea21af805fe624b13fce7147067d4cedac5bc796697295723f25ed62a291. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:48:04Z), 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/USHM21190242.
Ave Maria, Prelude No. 1 In C Major, Bwv 846
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6561e021fb2fccbd59d638d1b27db4cf62d94b7a4b9bd223902ac57248e379dc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM21190245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99c5475fe326df3ebef49f7c28905b419f8697d04b7ac818d07da93c46acc77. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM21190246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84a49fdee4477723ec7c4f5fbb8320b8dfc951cd99f50d300b48d667c7bc430. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM21190247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71651ee5ea9a282d734148b6687d07e10967aa4ac01b20ff9f8b2079cca9f8e9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM21190251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfdcfbb7b678afad1b4a605fc53b6eadbdf340f96c76b00793cb63d65c036e6. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/USHM21190255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6809c45334b7fba622959c8df79d78fdceb5167aeab78cc10bcaa2678f4e3c30. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM21190260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621f6f6d3161ba385e35ea669b7ce6de6e69d0f1ff8763642fe99a2cf5b14035. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM21190264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7778713e3365bfaf85532897ddc12e00777b94e776a394c56777cb6e822137b0. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/USHM21190266.
Concerto No.4 In F Minor, Rv 297, "Winter" For Classical Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2444f8c2474ac9602f42d4051c04b435e89af28ae7cc388b5d39fce094a0e06e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USHM21190268.