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 0xd081718e931837aeb93b122e9458fa5d94e413b193295903bab70b336502f640. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55929c3c-63af-40e9-bca9-d4272cb7abe9.json and https://artists.proofprofile.net/proofs/artist/55929c3c-63af-40e9-bca9-d4272cb7abe9.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 0x957d4c40fc25382a37ce0d1307c6ac851dc158c4a8d2182cfc7d89d854f489e1. 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/DEA891700257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa109ddaf6fc8264939128bba13122204e324d9b8492f02f9d349aea2b38b17. 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/DEQ752200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15336116d491874d650ffed4db11f6a15dd5383eebd8f64f10d965b8be637bd. 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/DEQ752200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fa616a48ad06d2d9b825317500c4e7cf35449ad1eb49d5743b898699a27316. 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/DEQ752200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9574a3b80b1d845285f0a00209c5843de7f4bc1a4812501b142013cb0a65a0bd. 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/DEQ751800093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd617e5e417dcb25b8439e85567e4c189ceb5fd8fc367f46fd8c1df40bb041091. 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/DEQ752100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8c902d1bced1b5c83c91513cdea6aae7c8079edf96f6f4e6cd1842e38f5ddd. 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/DEQ752100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9896da0f41c846048786b82c6245e8bdb3a89fd89e1e59232d1f1a8e8c736358. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQ751800092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923e382dc3a2e5e9fcdc38993098c43574d497ce59b3f837783a8b170fb82584. 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/DEQ752100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390e085f2a2de08a8a8fe1f19101099617fcfc7f6cb98e85f6695cf7f183d143. 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/DEQ751800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bb3c3688e7e1a2ee9cc58b608ad2be6e225db03cf6ad641e3e058c842240f0. 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/DEQ751800082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe127cfac40fa5a2bee114e662613e8524528c8bce592c68e4e34a57576f2f573. 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/DEQ751600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5a8e5f6204f5d59f9107d834d5e1b93f1f19d3b7e34310e7eedfb842b8d52f. 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/DEQ751600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a46d373de7109b89db6bbab48f213414c9f8a47bb3baee7d022c4523a80bf5. 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/DEA891500341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14acefee96d7f1297533bb8e9a805cc4e9c9cc090b6cb9e98a48d6ae891058b8. 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/DEA891500344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae5bf5a4865074d3893a1573d3c8d04379e45f7283f6adcf09dda26c0d235b9. 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/DEQ751300161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c07d43ee7029a86df27fcc472c326fc08f76a8512ffa6e56b650b3d5852a8a. 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/DEQ751000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98256a09f5508515e29837bf6860750094a7f54f2ba640dc1628e217adf51ca3. 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/DEQ750800025.
What Are You Doing the Rest of Your Life
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc234dc1e02e52f368e7bdac028f43cdff88925c18d7928cf5cb006b64efaf6f6. 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/DEQ752500121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa109ddaf6fc8264939128bba13122204e324d9b8492f02f9d349aea2b38b17. 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/DEQ752200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15336116d491874d650ffed4db11f6a15dd5383eebd8f64f10d965b8be637bd. 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/DEQ752200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8c902d1bced1b5c83c91513cdea6aae7c8079edf96f6f4e6cd1842e38f5ddd. 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/DEQ752100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9896da0f41c846048786b82c6245e8bdb3a89fd89e1e59232d1f1a8e8c736358. 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/DEQ751800092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9574a3b80b1d845285f0a00209c5843de7f4bc1a4812501b142013cb0a65a0bd. 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/DEQ751800093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bb3c3688e7e1a2ee9cc58b608ad2be6e225db03cf6ad641e3e058c842240f0. 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/DEQ751800082.
Brothers (with Helge Lien Trio & Tore Brunborg)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e23cafe0fc657e2a20dcb0f218313905463731abf8ef967305d783d9b8a4ad8. 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/DEA891700243.
The Magic & the Mystery of the Piano Trio: Ballads & Lullabies