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 0xbacfc8111cdd782092a2a7795fe40bf5edb017970c14d10322e3fea8b5745886. Chain 2 (Bitcoin): anchored in block 953871 (2026-06-16T01:46:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06846954-5c74-4f5a-be2e-a060120557d4.json and https://artists.proofprofile.net/proofs/artist/06846954-5c74-4f5a-be2e-a060120557d4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ward: Madrigals, Fantasias, Psalms & Anthems
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 0x57c4456282505eb8a1cc81a695d2a1d7bb50bd4e21ac41ee63cd2c4f7262e081. 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/ES7141500620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a56c526ab900ba4d5c7878d8d236132548d3b97177e75235ac8293383e685b1. 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/ES7141500634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3df92b3fb4c189f991f27de8aca56033f1f912cf8df6161648e6b0a62bc81c8. 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/ES7141500635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfa581a9f58e9755d47c5297cf323c1a9d1efae86ff81f4584c9f8573cec4e0. 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/ES7141500637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92cb5d22c8d34e770cc4e11c800563a6838aceb38ee75dfab8b2bea5040e192. 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/ES7141500624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77dd06ff90e6e6bbae2423b00e6c0ac7b29a4864e4d37abc86e999718a90219. 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/ES7141500639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d423a4cdacce352646e26a1fa4b62606134b04e4606cc9dff68356c30fd07a. 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/ES7141500625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfb196361e3bb70604257fef37a2820b01cc58b714032b2ff987dd45664750d. 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/ES7141500619.
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 0x5278503012229b1b3a1629d7b19e6919b47e269b53d692a3e50dabc7e12568d5. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ES7141500633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2928520ec6294249cfb6aff01ab2e8b9305823f09ad5ac6879f19bf3ce0f708. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES7141500621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59efbb68e197eb6f57701418de4c0995c529fd46c5306f36f1afbfa738551061. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/ES7141500636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fffba7a042bc8b4d793a0129f0c104d82abdacaaedf4ceee5300929a294a41. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/ES7141500622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb51ea24ec5416f16a435a65ea5ab2999ba3b3b0a3eeae13a2b5972ed707ef3. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/ES7141500623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaff49bd655e9b6bca233a5298a80f4c64111e89b37847ff25dd67093059f6be. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES7141500638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc630bfad253db68a21c58023f7a93c3b4af5b112910123090e00a139031350. 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/ES7141500626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2d5e8c73979b55b6784e168d1bcc12e0dba1c76ddf4182c5265b3672d27c1b. 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/ES7141500640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72a578729a07979cfcadceb44585a3d44fb62c9b4d40c39aaa81297211ee341. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ES7141500641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04de1801557d9295f575a63c36c3dd7d3e500c6b920a2c9eaaa1053c5d9eded4. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ES7141500627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf64722e412f4b2e4a6f8808f73d92f21c6b0a7944b860f8bc7f325ff949e42. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES7141500642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9d34c1fc95da37619b16e95916e038d6765d7e040f4e4ea4bcd9c210ccd7b8. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/ES7141500628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a5de6431e06d22b00a1d2673f0bc03f616a0ad599945cf2c9833c89d2edc94. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ES7141500629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a079ecce4a29047f834800e973b0dae125eec87bf0572d167d4ab4690988ac. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES7141500630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff12892acafc6a0d9ca6a8c0dc62281aafd73737b4fb7cc21ced2d23be0392b3. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ES7141500631.
Fantasia on In Nomine a 6 in G Minor, No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434d342a6b63c109337ea8bf7c240bb229838465f3e0be6287c7927d5f52fb24. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ES7141500632.