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 0xb225005c339c6e422248f9d1bcda40645580cbe09947a9ea90da42ebd7d6dccc. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/981e2e5c-be4c-41ac-8027-39f4e97f70f5.json and https://artists.proofprofile.net/proofs/artist/981e2e5c-be4c-41ac-8027-39f4e97f70f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La mantovana (Arr. for Baroque Violin, Theorbo, Archlute & 2 Guitars by Anonymous)
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 0xf1dd9307a9ac73c59855150a73059b7daea9ebb3d3c62b5f51bcf46d71fed87b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH1492445902.
E vivere e morire (Arr. for Baroque Violin, Theorbo, Archlute & 2 Guitars by Anonymous)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c0f825e5160882ac6927bb3d16e19413e0a73da1534b20970174520b28bd0c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1492445904.
Lamento della Ninfa, SV 163 (Arr. for Baroque Violin, Theorbo, Archlute & 2 Guitars by Anonymous): Lamento della Ninfa, SV 163 (Arr. for Baroque Violin, Theorbo, Archlute & 2 Guitars by Anony
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e97a57b882b18ef34b18342569ffd2cc5bdff5d964914546e645db2c3620783. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CH1492445905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cce37387a09ece3d525b14cd32e657223a80bdb00b8c7667b47db0a3170ce7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH1492445918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765e9fea62e1169b47fde63b04c0984b71410ee27fd21960316c6a8efd8d574f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES29G2306802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa857827516eb3b07a606ffcd9e52f570a4f168ef38bd95bc25084109cbe02a8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ES29G2306803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc473ef0c2fa42714a2096d2fd16332acf81e5da812f319a3fe683aa3a01e6d42. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES29G2306804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5db91c9a0f1be9577e5cc15817d1120cce74c3d1127db34de624aa60877513. 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/ES29G2306805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623b2cf2b1c98fa25b4a1f99d2529bb87516109ee92d79b62e32d5100213cd0b. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/ES29G2306806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dfd1929b8f75421e747b218351c4ef39c6e26c830c2dc5ef4c39a3d977e3a6. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES29G2306808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb42d7dabe5378e2c79a852574ea581faeab1fe80126b4c784eb5651de47f355. 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/ES29G2306809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8a04137047ec6bb16a568146457828469f85294b2c111dbc7aee20c79ad855. 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/ES29G2306810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd60e0230ec70ccd00ee74a6d2f12d7b0fd06ffc9e5892918e4c134c68d39dc. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ES29G2306811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8cf8ce5e0f94dfb02f8ee624ab6847981361b0c746b27a184ef4f0d3a6903f. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ES29G2306812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c39a1666f7cb25dda69be5f667f431bb92ed317ffc2581ffad9ee27583d086. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES29G2306814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2d051e2d3118843419d2add79c17188b15f5e574b8c061be107643e603bca4. 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/ES29G2306815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c8e25d89f4465445ab4a4166700cad3d7a0e824b045bb1047ba708759eab7d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES29G2306816.
The Hibernian Muse. Music for Ireland by Purcell and Cousser
Great Parent, Hail!, Z 327: II. Great Parent, Hail!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352bbd3447cefa412dde0695de7ae8368697cb4416e83b331f3296b42ac945c6. 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/GBASH2268502.
The Fairy Queen, Z. 629: A Birds Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad9b2f532b9ea1e1bc6b700a7dd22c1a16e37a4607d6107c8a801adeb98be4d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEFG22261902.
Suite in E Minor, RCT 2: V. Le Rappel des Oiseaux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc25cca5a15fd1f760fca6eb8b7ac1cba2757bb4168e6e8fd8771077e1304aa7. 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/DEFG22261915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1343a6ffe1ffd72bd2a613d5cbccc76fb551e0b21cb76afbfe64ebf0ed86ac1d. 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/DEFG22261917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbc20b19ce5be0d4e9326ece09f4a19070237c6be9820d5f587f5d087cdd11b. 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/DEFG22261924.