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 0x23566663c0a732e4ae7f5e1db9178e8d6431012020edc92b35cd68c78d9397fc. 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/5d47a045-5db7-4808-b8ff-5628f1bdd23a.json and https://artists.proofprofile.net/proofs/artist/5d47a045-5db7-4808-b8ff-5628f1bdd23a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ninja Gaiden The Definitive Soundtrack, Vol. 2
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 0xde76e286ae4909985c75f320db1bdc6ba563fbcf23c5c2b8b13b846bfbb22df9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPV531600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d991b30298c5b75d0143710426d6b31ed3d6db00bfe64c336f1b9a939802164. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPV531600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3eb05a60b048d41bee4b115b28b82973bc7fbd0b6051ebbcc9a7c691cb5804. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:12:55Z), 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/JPV531600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd525078239d9a8b327fe939f9b5cd9a93f9a617f522a62e189a45bcb5731f4e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:02Z), 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/JPV531600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e69974019350bc5969e1fa77fe98f9019743dc84bb80128f42c2fd04df50c20. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:35:08Z), 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/JPV531600072.
Ninja Gaiden The Definitive Soundtrack, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa613cd3600999429cdf3d40872e843647d25fd2df786c9ab3ab3e78a511de47c. 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/JPV531600013.
Ninja Gaiden The Definitive Soundtrack, Vols. 1 & 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042b92c3822bf8cea2f0b5ce9d9f858254c7164f3bcaf47ab7178ac7796b69e1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:13:56Z), 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/JPV531600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d991b30298c5b75d0143710426d6b31ed3d6db00bfe64c336f1b9a939802164. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPV531600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750403e730f24fa9b63078edd8e15f982f28dbbdfada50d2973350e933eaa7bc. 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/JPV531600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1eb5eb57c42b4307ec56938faaf449d383cbfe9cf11fc1a7dfa9516d93dc0c4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/JPV531600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe5452f8a8a98b740297ca1869dc6a6af60ecbf0ee8415426c6a89d17fde09a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPV531600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6069b1801103ea8bbe420e5dbf82faa83e0d1ecd5b1bbbc98cb025381304ddc2. 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/JPV531600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3eb05a60b048d41bee4b115b28b82973bc7fbd0b6051ebbcc9a7c691cb5804. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:25:57Z), 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/JPV531600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd525078239d9a8b327fe939f9b5cd9a93f9a617f522a62e189a45bcb5731f4e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPV531600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cbe014b125f1746b519d668a3cc7550339bcf9ec095822c7050404e93a5fab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPV531600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e69974019350bc5969e1fa77fe98f9019743dc84bb80128f42c2fd04df50c20. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPV531600072.
Surprise Attack: The Wicked God's Secret Maneuvers - NES
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2faf9ec2f1159167a03444d4b2fd4dafda619f5f5341b9024289042841fa11b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/JPV531600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51867e47aad1492ab81b877c74cbe6522e75d112aab8363dd55173809a7a3fe0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPV531600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5923d8aa6901de56d27ff3e263eb1a69b253f1a87c1efc8f5a693d984a41e0. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/JPV531600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4424aa2a82cda0f998e33b03c5919aa5ddac82269f8cfc96868eb61018502bd6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/JPV531600019.
Showdown: At the Portal of Death (Battlefield) - NES
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2818028aa13cf3f67d8e09f48265e67e78c1c561e58258ae86e2fada8a9c32. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:07:04Z), 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/JPV531600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c4527aa7612e8240d6222b12d2e06c42d6d7f86974b27a020867b20000e170. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPV531600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c395866bbaf4faf4dd8ceba31db2862c8b8db9ee4832fd03ed74ae5bd15f75. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/JPV531600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b186776ad9f9615bc6f969653b0f40ec10594ec365ccb6df4cb1ba2f97da04c. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:27:34Z), 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/JPV531600027.
忍者龍剣伝 オリジナルサウンドトラック コンプリートコレクション
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99de5415379b33b6f728785b4d7db15c7439696d43f51a2d80f0cd269abef204. 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/JPV531600187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1d958720e171c0c821657f649aa91bad688a1bdd659ad19a5b1f7add003c03. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPV531600131.