1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x1a2e8285654176af2e8c83cee7dbd00f3fdaa68dbc26e372250266bac5c1c559. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d7dd4a2-0787-4138-9820-21910bd5ef06.json and https://artists.proofprofile.net/proofs/artist/5d7dd4a2-0787-4138-9820-21910bd5ef06.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 → block OTSBitcoinBlock must exist at that height 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 0x1663092eb17cb0d4ebfb31a2012d1c55120014ed4199bd9052d279ddc7d56e6b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWY2487957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2b0ae1591f3628ac5d8e0fe2f0aaa93cdf282253ab423d999ffd8654f8336d. 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/QT3EY2442614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f860b5ee8c5e362209edf095e1f8d1f707f189a95826a3e52b2c052d057854. 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/QZFYY2480879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a0b4d121886e10b25c2111977876cc20c3bc203a3c36b4ed21db7fd2ec362a. 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/QZHNC2461456.
Duet for Pianoforte and Violincello, no.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca625e97eab1dde582b49ed17a0e6cd21f320798c3b22e5366886f7542a2509. 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/QZNWZ2492092.
Miniature for Brass and Percussion, no.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c8ae2405affa6bf631ba34117648d0d9ecfc9ac7201091ccca7c340e2cf43d. 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/QZTAY2404049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78ae589fa891b56bd130cee9b335320e6f629c727a47cff57c51f3a62151f28. 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/QZRP52469220.
Ich wollte deine Liebe (E-Piano Version)
Ich wollte deine Liebe - E-Piano Version
Duet for Pianoforte and Violincello, no.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9403460be83d24d50abbf08971369800048c055c2f68099f4bebe7bd64d3205d. 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/QZTAT2468345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571339cf835ac2ace2316be219cc10c6a591e705899057b871fafae0b038340c. 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/QZNWZ2497682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6474e4fe56a06360bde05dc8b3a258cdf1a592794262f606b4882aa0d04ac6b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFX2499346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b11edf6a223c7e2c9a2d7ee669b26c69082656f52e041f1f78879f8e92af4e3. 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/QZZ7M2471910.
Duet for Pianoforte and Violincello, no.3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad970d8412eca926eaab2654080e1af3f3621229417604b63f56ec547299abc. 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/QZFYY2529506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e1687e632f536eecb3e5c6e92b606c2233538eb5c5077541054b400ca2ac26. 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/QT3F22427676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc265476930e377c3254f6abf0dfa914a0aed4bf7271672a129db49f6b370ea5b. 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/QT3EY2444632.
Miniature for Brass and Percussion, no.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab977141fd64ff3dd2b72f8bccabc9c8258c7569e067e7670cd37d9378d3d46. 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/QT3F22459357.
Duet for Pianoforte and Violoncello, no.4