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 0x7ee705586ac27f53383941d45f440b0c766b9be529d9bf543208458db68f96ab. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e01d52bf-b754-491d-a37d-db8b2b4c84ab.json and https://artists.proofprofile.net/proofs/artist/e01d52bf-b754-491d-a37d-db8b2b4c84ab.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 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 0x7c7dd44ad097db99e841ffe941db4ac5038777ab8c73311e77c56a53c785bad9. 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/QZ6BJ2100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a5680ee7a4d558a335e50440f1b62758f0f95da419ac5ce57bdae6a34aa38a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZ6BJ2100310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b304163a97a9ae4a4ec84287c68efb3ac5baacdd9c636b095be502c31982b0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZK6P2167290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c5f25123bcf6bad3326b52d943283f97b6cf6f1fa044f37bc85006d796ece5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6H2188847.
Vivaldi Variation (arr. for piano from Concerto for Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a99090de61823009520966a02d5073ae0d9fec09f03b18e19626a61d68c7b9a. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZNWZ2191840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc478ce0b98ebf1cfc4899234da5122de5a22fd1e57715d306d6d2bb7ec539e6c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKR6V2117335.
Mozart Reimagined (Arr. for Piano from Concerto No. 20 in D minor)
Beethoven in Love (A Modern Interpretation of Sonata No. 1 in F minor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51fec631b06277e6dc3b20483405ed17bc61329816648444e0f1280bdaedc5a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAU2122990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6997b7f6eaa6eb7a8819136ba6fce34cf86ea4ec74506b061b3095eae0ceddb4. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZ6BJ2206602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e086b102decb2042736746af6573f30ff86781ab4c32d371757eff362448e79. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ6BJ2206702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6997b7f6eaa6eb7a8819136ba6fce34cf86ea4ec74506b061b3095eae0ceddb4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZ6BJ2206602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855e93957ff2af85a670c2f2238485c5af6fb6ab9d83f18192f99e3f0ba69409. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZES92359840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f06c0f4283eb0104acc437104f3d9cccf33850f8f1523c52c6b33f283f347f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZK6L2340543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3323f89993e5153b3a4d904bf4467196578670bafea67d7e7de441e563b919cd. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZK6L2376173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8a9d9b39c9dad753bc335ede1e814637b5ea6d041cda4de63008479a009540. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMER2369293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7b120f7fb2debc0c5b46ba083c5e4c7de1309cbd9be26820748d55385c26a1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCAHM2364397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b55e574aa18fa05c1490ade1c76fee3cf2bf38b460716b7bd2d818aa10e027e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ6BJ2406504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cb6a07fd3c3c9c590f20dbd33d8876469ecd789c7590e339cbd8bba2937f49. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ6BJ2406512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153e8b1156a4dfd402cf27324f9fb47263f09e96fa17e1ba38733f62584cfd3c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ6BJ2406501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e23e234951c16a0157a304b8f91fa0e9bcc7ff849ec523408782e4fecefdd2d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZ6BJ2406513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcd331c6d67edcb848dc4556ae0bf813ae14c8633eb60ea87dab8c0c2578dbc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZ6BJ2507201.