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 0x873ca02675d69b0e01df9fccc31ccf19cde254e79b1a2757abf5ec3b221fa70a. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4f44837-dbb4-4eda-89ff-f166d5b980c0.json and https://artists.proofprofile.net/proofs/artist/f4f44837-dbb4-4eda-89ff-f166d5b980c0.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Rejoice in the Lamb (Orch. by Imogen Holst)
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 0xb387e400b64720f37768a03b421925e43df43081280a278a1c7b353390624c41. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK4WW1660001 — a six-check JSON result.
The Lark Ascending (Arr. for violin and mixed choir by Paul Drayton, Adapted by Barnaby Smith)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e115457a33aa3e0252105b005dfbf78479bf364cfb2579dd543629e337d7d4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK4WW1660002 — a six-check JSON result.
The Cloths of Heaven (Orch. by Iain Farrington)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ecce58b75d30a3c8398644f8db5b63bd09db3074f5e48592ef6d9ca9e981e3. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK4WW1660003 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34db8394878e4e7508304c183f0e76611542b8b41763be3c600fd60e143ef09e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK4WW1660004 — a six-check JSON result.
To Sing of Love - A Triptych: I. Effortlessly
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bc67eb0976fe1b00bda728790563cfd6d1c9c1aa2b25cbbd0bdfe7842b876e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK4WW1660005 — a six-check JSON result.
To Sing of Love - A Triptych: II. Perilously
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f346e3386800a8d26438f767255fbcab2e52d919b2a4b05d172931e7f40c18. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK4WW1660006 — a six-check JSON result.
To Sing of Love - A Triptych: III. Generously
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123230d9331751f80c27e5d87bd4ccfa1e650854396f1108579ddb5e2f87eebb. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK4WW1660007 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcdd4675c9ee98ea2ba279801f10d0953cd315a8ad92b6e9f677a007aadab9b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK4WW1660008 — a six-check JSON result.
Joy to the World (Arr. Taylor Scott Davis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0589acbdb520f73d81441df3f8097eb5dbc08a6e2f0bda1d05b26e74be1dbb2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2301238 — a six-check JSON result.
Away in a Manger (Arr. Taylor Scott Davis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa44468cc32d50d446edddfaa4745dada6a61b6241f1b95895158442f0a2f7c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2301239 — a six-check JSON result.
O Come, All Ye Faithful (Arr. Taylor Scott Davis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9240cd39189de3b6bdd1aa474dd8df135fff45909783fb7597f82600ac8702bb. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2301241 — a six-check JSON result.
Magnificat: I. Magnificat anima mea (Version for Full Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c28acaff0cba5899bd901c29ae5291b0c82f79f7ff45475251ab06da201af9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2301242 — a six-check JSON result.
Magnificat: II. Shall I Rejoice (Version for Full Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb789b17fb0526aa830369e46a352bccbc3697e4bc266e1631f3bbce2dc7a50da. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2301243 — a six-check JSON result.
Magnificat: III. Et misericordia (Version for Full Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539f2de20f1f475a501faf29e443a73087cec8fb6997dc4662fa7af21dc15e1a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2301244 — a six-check JSON result.
Magnificat: IV. Deposuit (Version for Full Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63e9fd32273c1038c9467c2447ce7d649c6ba54eb216b16c16f36adca236cad. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2301245 — a six-check JSON result.
Magnificat: V. Gloria Patri (Version for Full Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c84322e0e0c291e94f1a30420220445ee4de97e604c62bb17a7f0b959ed1b8f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2301246 — a six-check JSON result.
O Come, O Come Emmanuel (Arr. Taylor Scott Davis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3bac31d652737637b735a5d85c6d80ecb501112283299418086f709d4935a6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2301247 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6e84c9bd6b6fdd12e97274f5d0a0967492e21b1a9ba6a894cd12b890b4871b. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2301240 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7820e243fe8a716068efba9f148b6f1b399efbe3c10707c03e2b19317eb06fb5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2301249 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa44468cc32d50d446edddfaa4745dada6a61b6241f1b95895158442f0a2f7c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2301239 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda307175f246688a3d2de1b280189ad866418a0317e4d4b23f6777102e4c1988. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK4WW1250002 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143f9e048aa3c11d73652c29de3a01db2fc280f3905b4a5aa7574eec78c90398. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK4WW1250012 — a six-check JSON result.