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 0xc4725506ea146d6f2860019a33e0c9f86ad73e8479b4dba7eafd83ff729a02d5. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ea2cf0b-2758-45da-bcae-ae2fcface282.json and https://artists.proofprofile.net/proofs/artist/4ea2cf0b-2758-45da-bcae-ae2fcface282.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pietro Beltrani Live (Classics in Jazz and more)
Sergei Rachmaninov: Complete Piano Transcriptions
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 0x11e9ac8924c58fb74d389399739599c7a169a070369e853d1d780a3c4fda876e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT3EZ2574958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489a93cec3bdd3fffee68e0c6d87b2ee34cab82e09af1171eaf99e6770ae2840. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:31:54Z), 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/QT3EZ2574959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013fd18dbbdfd49b98e0ee15ac8fcaac3d8a3fa1d9a77fd40dd353017a46ecee. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT3EZ2574960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937d0498edd2bd8c8e79bcd47ae2c3cc3f05502724500efeec73eda3223a4122. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3EZ2574961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e39f3a302b40fc8616096d3b8bc6da54e267a1795927e4bc88d920296c5c27a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3EZ2574962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b8cb70b265bbaf74f990a8480e9fd9f7f26e5fee6da1b2db18e91e50b10829. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3EZ2574963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9b130e8c6cb1203026e437d6be67caa07158a698c8355023fa50d65301969d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3EZ2574964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef974377b6de94865c998ed16a7dc41d7353167a06c68b0a77fcedb5b422a91. 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/QT3EZ2574965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85da7966e8534333a417cc222e592aef948d98ad61cb49e8a6f40601d5cd2073. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT3EZ2574966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2738fcb683888be29ccd47f80875d6473b260f9d7c6c8de01fb70451f2118c47. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3EZ2574967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1e1d4e392ee9582d2814a4b24a88c6bddac15215543d3e4c746cd3318fcc35. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3EZ2574968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf13991cfb18e3dfe3c8d07b55df5dca64276ad08ba06ba8e662ad3c39285e8. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QT3EZ2572259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a77983368ff8096576821188f5881ad5ee42fc9e4b9d847de238ccde5511f9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3EZ2572260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6d582fee1c2ff940514046d612a35d04a40be7b65bcedcae48bbc6d5d144a2. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QT3EZ2572261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fa204d0e1f0d604652d8396cf86eeb61aaf32c4fe273dd8dee1311f81ae4dc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT3EZ2572262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5bbae6f86c920e1b635d0f057962d8357976e31aab39270b9c3b3e1bbe689d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3EZ2572263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410a117b60c11bdfa7ab63afcd5b5047d31ccdcb9865ddaac58f6a6d42f77f13. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QT3EZ2572264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc1e38e3c542a6a017d47ca5485930dfe01e5d32885afcb07957de14c978904. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QT3EZ2572265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654176b0031b65f395f512d596998f7a951bf6faef324bc0562d49596d66a658. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:02:14Z), 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/QT3EZ2572266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1a6e2af84853ecccbdb30c8fccb3d3034ccb3d9b38fee4cc439c068cff387e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:40:07Z), 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/QT3EZ2572267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafd3f0c45778c2b2d011a934e6e4f000ba3c6b88253257d8010d2b84ca46544. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QT3EZ2572268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf58b0beef99b2cafd06a8727a3e800588b803c026a85344f850a1c08b7675d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3EZ2572269.