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 0x144ef1fca3b91079e9bd5be7fa56a164420a219b85c07c072d1bec7bf8a0bc82. 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/625455dd-9b5d-4980-90e8-7aa2b910ebc1.json and https://artists.proofprofile.net/proofs/artist/625455dd-9b5d-4980-90e8-7aa2b910ebc1.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 0xadb35f3c1c0a6eaaf4aa36a73636e36d6e859ff76bcc9f6f2c241a177322f4f4. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DEL160030101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0268cf7b8bfae1d5eeb66a79564fd98fa17fdeb42b9d4e1a6ecb122dc5113c25. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEL160030102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e93b12c2f3076c91df1cb8f36bbc003cbb3849be3e07a04d694deb38eab5b34. 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/DEL160030103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0299e6036419fe0a971f37f81cbbf20ec4822f56507d119a1c29a57bb62b853b. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/DEL160030107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e692d0b93e90c8c274d1c6d44ac9c3eb577c62277214e212cee557b4bfbbd6b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEL161830101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62e1e529705344156a025ee00eccc7683240f4a4bef699a17f3eb1698d7432d. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DEL161830103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd70cef73aa6edabc98272927ba9ac443bd46e1f487332d3d69b3d8b0cc21b91. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEL161830104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e4ab5fe88e63bafbda6f17df79ee3ec51a6cfc33b54ce7966a9d1b20bede9e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEL161830105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb799596e1500a8946c923cb890e199cfd4ca1bb7f2a0443eb230a039aea38eb. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/DEL161830106.
Rain, Thunder & Relaxing Piano, Pt. VIII
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9d5546d268288565299e314968fbf813d0ebc8ab77dcbc7c722275137aae19. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEL161830108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8a96a5ef10467606cbe3f77638d16576f3635c66bc859865f8a93308a09d50. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/DEL161830111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5689c56b5b8b9c8908efff684b7e85e8507f09edae7fe6d41a24c145a23fe2a4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEL161830112.
Rain, Thunder & Relaxing Piano, Pt. XIII
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289c0f14fbe2e5066c648af47c6b3aea020c55fa065985d74ff5d7d92e1cec44. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEL161830113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4546cbe1aa6d512550ce1d00bf0df09b284889e28251a4fc11f1d54c481a198. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEL161830116.
Rain, Thunder & Relaxing Piano, Pt. XVII
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2cfc912f52c01cfeee3aef812892bb090a910ff524fb5c0be87fac0f20d99c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEL161830117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93df766ee1a3e380c7083a65e4e8d80e0e8fb0cc07c73d3c594d3be9b2add4c. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/DEL161830119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a409e2507abd3e8297b8ebf1989c5725f46e6178c79b74165e41a0960fd960. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEL161830120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0b6fbd093fbeb3c2de5fad546bedc0b239acf5451fc386029f96a071886dfa. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/DEL161830121.
Rain, Thunder & Relaxing Piano, Pt. XXIII
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1b91cf92cdbfb519905439f8d4c1bea03fb52d5675ac75b676cb79fd7a722b. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/DEL161830123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af186c4e86c8945a5f438e8d77890bb20e984dfe9cd56b25ad3ae07d0a90a4d. 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/DEL161830306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a7e167191f1394d35996e03512691f2b122492f19e64deb0de55548c256f20. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/DEL161830308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f706237d8d8ab21890bd42594508df789945f07e2530eeac60e51741aae5c2. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEL161830311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce714e2c4fbf1f8c68c5583063f668aa5649d74f789d4e1d840ab6d76708c270. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DEL161830312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a2efef1498a6134d290a6f02afc6e3ce683201b80785bd53b8fb3ff9cfafca. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/DEL162431001.