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 0xfd3ab8b3fb28adf68d3bd711af438d38a28342cf45b8331d58d6d2d51b58ccbc. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c629356-6753-4a3e-a7b9-c48053afbf83.json and https://artists.proofprofile.net/proofs/artist/9c629356-6753-4a3e-a7b9-c48053afbf83.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 0x4ca946bc9cdfe6dd62f6530dbcc20d73ab8a16850f9193c39506c5cf53019c3f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPKI02410584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be33ecee15d553cd4807bbf4a13bedea6416bde46a3493ba30bc250afd0719a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPKI02410583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4ee6f9bb76019afebc643ac59e864901f8fb72ef1aab37ab2ac2936542bb55. 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/JPKI02410344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2cbf6e23979ad2a07b631abb88024ecc8496259401262e1333f2de633a7ec5. 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/JPKI02410349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9443a8d1957ff88c678005fc5789cad1a8787c13a628f28cbb1d58506545028f. 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/JPKI02410351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb292b6c6d383b89c9da2838332461ff2784f9d586e33ad6fa327cec13d21c97c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPKI02410352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641220ae5b9a98d3afd8ca6b22dcc2939a49601556c3d32387cce3fc0b250874. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/JPKI02410357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339ef542a2e198ac5b8ec465b25b0b3d67867a80aa933a33661be0185f508825. 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/JPKI02410358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4988874d4971ec94ee6ebad1a2ceb464a5a1c090f1a517cfc2636d050471ff5b. 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/JPKI02410359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b171bb1c78a92b72614ac0d3fcf5f082ecf152ea8d2efdad9f85630171935fd. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/JPKI02410363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da52ad96460c1283d246facd0995f8018fdc9a724ca54db5476e9a4b6f6266e. 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/JPKI02410364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9886bf50983d57a5ea131a375526116d71ecf020a1cec24000adf5f4569a412b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPKI02410366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db1a7840d9d3ca8adcc702a4fcfc7578100a5ab0aa449b131dc8e8cb54c8b1f. 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/JPKI02410367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abe294b19c01a2b3356d02b1b94360975b98adfbf8be0556bf208deab96f698. 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/JPKI02410368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f0d3f3e0f41cfac8e921e791c0d967379802f06b357cec551c1f1d8ea3f5e0. 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/JPKI02410374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd723e9efe1b459e380b3e43b4e3e01837a684f7eac3f6b7284be02405927beb6. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/JPKI02410380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be33ecee15d553cd4807bbf4a13bedea6416bde46a3493ba30bc250afd0719a. 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/JPKI02410583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca946bc9cdfe6dd62f6530dbcc20d73ab8a16850f9193c39506c5cf53019c3f. 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/JPKI02410584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0238aa29300d1734751e5071b3dbfd07e9dbfbb0e9fae99db7fa3936f8cbd947. 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/JPKI02410382.
Etudes-Tableaux, Op. 33, No. 1 in F Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3811d927bc05617839c260b93a46cd4ccee522b83eaa2d295b0be6810ee56e3. 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/JPKI02410383.