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 0xc539466c8d3ab3cbfe9201d041a79ac582b04ee87c4f421e7208cb7611ca66fb. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1da9782-570d-4587-8d33-3bc0acf6c7cb.json and https://artists.proofprofile.net/proofs/artist/f1da9782-570d-4587-8d33-3bc0acf6c7cb.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 0x96e59dc04a6931804253954571eb966c81e592dbd20fc6c70ea3b1ff28967872. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEB330180301.
Ancor che col partire (Arr. The Dowland Project, Potter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b02ba2d114bfadfbd7225ac7cae6df5a2faf48cfff0e85744a5a7c0446d5706. 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/DEB330180302.
Care-charming sleep (Arr. The Dowland Project, Potter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d887e3ba783cb6f00d3c724a3f89e21ce34ddec816c01d56d77bbd2a9212c77. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:06:18Z), 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/DEF330180304.
Weep, Weep, Mine Eyes (Arr. The Dowland Project, Potter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8160cc6c5688738aa806a4f7c65fcc4a7d67e2f42198d59939969407d586d067. 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/DEB330180306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5bfc8f95291af2b3f3c4512ac269b2180db6ac5047a8f0991fbf967b6bc0c7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEB330180308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae4e5599a965985966043fd7604df886b45debb4628d059fe0b3ca0abfbd3b2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEB330180309.
She Loves and She Confesses (Arr. The Dowland Project, Potter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66457397677338ccf5f29632883547187ab99d4b32805c671a159b2a270ef0b4. 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/DEB330180310.
Angela siete (Arr. The Dowland Project, Potter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fc9f3329b072a318fbbf99172c694cceb15ae7621de44f06545910dfea890e. 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/DEB330180311.
Refrain 4 / Monteverdi: Amor dov'è la fe' (Arr. The Dowland Project, Potter) - Medley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4bd0dc6a10011dea7a9ae77532870a96dce86d78d457e53703d12bff2c4c0f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB330180313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320804816f9397f2af5052bc0ac7e2679c87ad7acdff7c1419431c9d8c9f86b2. 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/DEB330180315.
Già più volte tremante (Arr. The Dowland Project, Potter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2200aed3b40fb20215a2a5571f8b38daac2cd151ec21dc3bf728ae77fbf50e10. 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/DEB330180303.
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
Accenti queruli (Arr. The Dowland Project, Potter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecfb724eaf41432a13117e825717c4fdce6f7825c44a4cd1cf7462080711584. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DEF330180305.
As I Walked Forth (Arr. The Dowland Project, Potter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ad37dfff92ac0768dbf0e9f4ab71f983e297e61eea15e9683a31732c2d39ff. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/DEB330180307.
Have You Seen But a Bright Lily Grow (Arr. The Dowland Project, Potter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32467a45138dd71d8cef9583a1360763841f34270a7e0a2cc50809ab57255c1e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEB330180312.