250px|thumb|"She Weepeth Sore in the Night", four voice round William Lawes (April 1602 – 24 September 1645) was an English composer and musician known for his innovative and experimental style of e
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 0xbbf0470ad3eae6170f83b9c3e58c54595f15ef3859e160883261126db1e00e1e. 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/6fa836c2-27ea-4151-9f52-645c3993ebd6.json and https://artists.proofprofile.net/proofs/artist/6fa836c2-27ea-4151-9f52-645c3993ebd6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lawes, W.: Harp Consorts Nos. 1-11 / Suite
Harp Consort No. 3 in G major: Alman - Corant - Corant - Saraband
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 0x15eecf8469963206272ec6999e4a380431c99d08c85d4612550bfad51a90e0f4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CAJ720837203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed5bfbc6c7db680990d306aa2635790c335d8d19692db6e4663a08f5be34ac7. 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/SEAEO0355070.
Fantasia-Suite No. 8 in D Major: I. Fantazia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e90411d46d5fda35e6085c770b13e99e45484c1a35b5bfa933f6fc4b400727. 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/NLA460915425.
Fantasia-Suite No. 8 in D Major: II. Almaine "La goutte"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc041a121d7f11978a01c870e38200acce4a79fe20bab1c84785cbca5161875b8. 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/NLA460915426.
Fantasia-Suite No. 8 in D Major: III. Galliard
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eedef74fada6d6539720e5a7a1f88449a97a4f5ff477e46477c45d706e0de68. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLA460915427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c6042372799527897ff026be95984bf1fe00b28434bd520de4ac5fb40730b0. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/SEAEO0355080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68832cf212833ce58188252279a7aaa802ffdde04c3e8a246237ab6aa26738db. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/SEAEO0355090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6bf2715c97defdd1ea9061537010b22f32f440f029fdabf37fa76ac7395b40. 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/BER181941302.