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 0xb619812347792dfc430cac3b4bb712944203a1ce00fff2052e8bdf36047402f8. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb7ca328-042d-4e65-954a-be25060de3d1.json and https://artists.proofprofile.net/proofs/artist/cb7ca328-042d-4e65-954a-be25060de3d1.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 0x02af5862edebb16c5cb8e98a21e0cb385f7cd4aaaaf461118408c7c673751061. 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/BER181435501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9108534b9f612fc918a4962bb529769b5bcbcaf13813f707a0f34fa68a5f68f5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BER181941501.
O clemens, o mitis, o coelestis pater, BuxWV 82
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbe3d4f532edb335a69e8a5efb53fbe30d4d57a6ca728b96b6446bf3013fe79. 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/BER181941502.
Dos estrellas le seguen (romance a 2,3 & 4)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc514f5abda36beacc4c5dc267a364c04b4f02906fa881a92563b5765292a1772. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE641416905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bda565eaf20b56bd5230e5ddde9c2d09fae520fa7bf0b552aa9689da210e6f. 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/BEE640800418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08389bff25981d9daf8d4694dd04c25c0d93de421e34f78b21c61ac1ceddaa5c. 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/BER180930001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3663ed78c7e12b25ed598f3253b4d76e183e9ab03e2eb4db252c9efc415a4ae0. 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/BER180930003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ec13d6d1a8390a998d5162ac90690bb64329f2c7bbacc98eb28196ac3a719d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BER180930005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee181f9c9316227d94d21abd8ece816ab9073511916397483e515ea233de98b6. 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/BER180930006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5f2328f9e21ce46cee4234c422a47b8d85dea18c42f703bcf8ebb63456acb5. 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/BER180930011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9526c23971ead692bf0efdd17045d73a8a522aaef2b24d1fb52b8caa96d1a9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BER180930014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08db1c6cd795d6122e341df9a3e921ca9c2c85f959c8032bc545c8831fb71105. 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/BER180930017.
David Pohle: Complete Sonatas & Ballet Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8694cf63051198a3c194d8580a4f68b6872bd3cbab34339972d0548dbc95ae. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BER182346015.
Jean-Marie Leclair: A Portrait, Sonatas and Dances
3ème sonate pour violon et basse continue en ré majeur (4ème livre) Op. 9 No. 3: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2d399ff5f15bb4ef196f561d3fd6e16bfd14d285aa31e1da5064cd342ce1c2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH1262002609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c6e1d280395c979203cab66dfa1d5fcf3ee10d491c14f78ac73907c1566539. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CH1262002618.
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 0xb580ad80af21643a3dbed0baeeb217fd17ae9cb52d3acf0957ad8aa1b92df962. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/CH1262002619.
Sinfonia decima settima a quatro violini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035eecd59532a55fd0991f391321a8818f6b6743fbd3df19d4b2de65ff54d1ae. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BER181840401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf572e6b91c2856846fda9e0c68a69de4a7e0f1ff469e576ffa0470666461395c. 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/BER181840404.