LilyPond is a computer program and file format for music engraving. One of LilyPond's major goals is to produce scores that are engraved with traditional layout rules, reflecting the era when scores w
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 0x7c2fc686c1b1983ba8f212f4e18caef6e8a116b35eff85d9bb6d5956dba7c9d3. 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/de6d5598-10b1-4340-af70-2d146747581a.json and https://artists.proofprofile.net/proofs/artist/de6d5598-10b1-4340-af70-2d146747581a.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 0x447d14b23ad50af25c29b235942f69520576c7f987f9f145c05215a903a98f2b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEZB52460008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91763ec8b0754781d4d8d7ba3754978e51870ddbc2603ba6bce420228476de9f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEZB52460018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1070c1112bc592145cd0dd10ff6a885f3e7996beafd0d27ccb656a529f74b5. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEZB52460028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e90eb5469a48407f50ed4e63f1988ad0b37d724487004b482d11001c66d90d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:46:11Z), 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/DEZB52460066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3770948c1df5bc2b18a902594481742ca4b4907ca4893b754c7ebe57638b519. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEZB52460067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1642835fd7980a07b28b94f58c4267095401c1c77a7cfc79db3a1dca269ebdb2. 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/DEZB52460068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320883eae845797929272becf96d7e0544afc73410dcbc969f7f67b4a1bd1358. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DEZB52460069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9dc88913ce2abe5fd102feb7761c9b6b69ba859084b29bd178e60459f0ad6a. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:56:53Z), 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/DEZB52460070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf748759892f5068705c16df1ba9ed9dee657a290d21a1aa1969718f670d6ec8. 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/DEZB52460116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d2021451bce6efb197d501743f439ca7bb29f3cb29e21e0cd9ec2f1b442f19. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEZB52460117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935f75f2e70d011ac59ebe8408bfa58a57203d281e6183b2fb7a2c329ecbba30. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:34:43Z), 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/DEZB52460118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bc8d48045005d8d130fb100af980434566d3879d37e1c46554937dc52f3dd1. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/DEZB52460119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5ef92c715dc0fd3cadb32b5e8f46e0172d9ae0ea8c7f76f5deb7cac151466b. 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/DEZB52460120.