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 0x0d7566fbe82e71a57c6730b85e6a6f01e48ed277a11a588c099cfa65be23139f. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b9c2c4e-8d75-4757-a5e5-9742a2950e3a.json and https://artists.proofprofile.net/proofs/artist/1b9c2c4e-8d75-4757-a5e5-9742a2950e3a.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 0xf46689473ba8466b605e9484de4f6c784df31f240ea3c29b7fdd0e437a3d6fc6. 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/QZF251800095.
Defected Radio Episode 150 (hosted by Sam Divine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b0cf5b5f453bf0f4d880fc0b82d2107a33cc9ca757c47ac1a519975b96897d. 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/GBCPZ1813245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4580dcc6e2a5364f2a55eabd829ad705a6f890e53e77dd5228658f158b4161f6. 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/GBCPZ1813250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c319ecc4ea954e0974dfad1d7e1030c27aad7363551c47c14097af99dac268. 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/GBCPZ9907715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809e863c19dd4e678512f81be0629b8477e3d321e3eb4866dcf8e2a2eab2a6e1. 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/DEB909900206.
Choral Music - Isaac, H. / Josquin Des Prez
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc31382a08170b4b15857701b28e0713eed84a05f8287fd332eb89f045d56c5. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USHM90557365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b2822e167cfd91b558912844448959cfc3ba40a924ffeaab65f6d019de2528. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USHM90557376.
Lassus, O.: Lagrime Di San Pietro / Melancholia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889ccfc65a481712136ce7e111b56d65d479dfa2c08e2407c86bbf6b72d049c8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM90537198.
Choral Music - Hofhaimer, P. / Isaac, H. / Senfl, L. / Josquin Des Prez / Festa, C. (Motets for Emperor Maximilian I)
Deliver Me (Urban Blues Project present Michael Procter)
Deliver Me - Urban Blues Project present Michael Procter; UBP Vocal Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624d3e8f7424702b3b025153bd3631b6b96fb91d9aa08f0a39c61185c078344a. 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/USSF70200181.
Love Don't Live (Urban Blues Project present Michael Procter)
Love Don't Live - The U.B.P. Classic Club Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff72f04543078d973924f1d4a255e308b768fec5cf108e2457938bfbf5dd99b0. 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/USSF79600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae29f4ee40dac6c1e9a447e641d004371a4458b7fec58a92087c15500f11e39. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEU231605117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd13db26c2608fb55a91d45805bbdd23026663051d440e89e8ef62590fd4370f. 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/DEU231605119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad554c38279a201015710cffe813dc0c8b8659eb287f8f9d16f94c23274fe10. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEU231605132.
Deep Grounder Presents There Is Soul in My House, Vol. 29
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bb7925e648e7cfad9e3515a85baaefc7580f5ba7a5e22bd0149b33cd62b703. 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/CH8081000405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56edf1dc9c64a000b0b14cf6dfc5ce2ccd8cb4f8873555057dc327104769ec75. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/ZAL071000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f322e3137426e639c39eb43b9dc4096fdb7fd85f8fad001ffcdf2ad667ae561. 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/CH8081000360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e5c6f27efaf78b02bbf0a5f3d7e779124fca219d0868da4511800ecfa88f01. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES59A1800002.
Cool House ... Cool Summer (Your cool summer soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf301d8efa4346f057c0a9ba1daafca7e9d08d2f6d7c3baad5d1d4c842d6b49a0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ITB881800260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30e803a7c762fef00441461b293a99f4415685b2f4e5a1d853fafcc1559996f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ITB880400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29342441e0f712e9d85b708fac86ae75cd177d99aef27ded52c87294840ca210. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UK2F51900014.
Quantize Recordings - 2021 The Year In Review
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6839fbd644e634f36d88f604fc9c313df231d6527b0362347bd2ed666c4af5ab. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/UKF4C1602691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3227ce0ef23b5fc1d511a6966e373fcf078625434638346e49753cb9b18d63bb. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/UKF4C1602447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e02208bd2f7b944143a7cd73879ed5fe2ae4ad962694ea4ad170b881848317. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GRER11601365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7aa1bd1e463a699f107364e03dda0a2b793680e60fde90a4fe463a1f2fcaedf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USZ9A1539701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f34542f6f183bf634c9c8d1111b911e562833f623a8aab8fcf8f6a23266cf2b. 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/USZ9A1741701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92926c66b8837c1b9af6972336bcf7c0052bd9f1a457c4583bfe5825fb4e3722. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/GBLV61716409.
Club Control, Vol. 1 (Mixed by Tha Soldier)