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 0xb754b5c2c0617b71455e0ec9c7bb709890fb6ff79249ded0ecbe98b12e8c142b. 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/3d6a7002-4d57-4589-87e7-bcc4a54f018a.json and https://artists.proofprofile.net/proofs/artist/3d6a7002-4d57-4589-87e7-bcc4a54f018a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a3a7865446e3f14d9eb0fee5bed92ebe54c0d46128bf1fe1cc206d519d922c. 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/TCJPM2092010.
ロービットファンタジー (feat. 星宮とと)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a3a7865446e3f14d9eb0fee5bed92ebe54c0d46128bf1fe1cc206d519d922c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPM2092010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac4701d4adc446531d1e97f81712a987c0764bb2fddb619d3155aee08562a0d. 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/TCJPM2092013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1784741db2538a760796bd95982a68c68a9c755dbefb40f44643fb172c7bffda. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:00:36Z), 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/TCJPS2210916.
ジャンピン・ジャンピン・ダンシン・ダンシン
Music is 90% Determined by the chorus (feat. Mameko)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d356e30b35cafcebc221d5af2a251b1ba119a2eb4f47f4fc665d9e9e604a2a. 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/JPI102200196.
Communication Magic / Again in Cape Town
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc068adb4d4669a688152fdb71dc7cfea3d988af300992ff536405b5efc3f1792. 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/TCJPO2174670.
Magical Girl Retirement Declaration (Kari) [feat. Hoshimiya Toto]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccad6741d8cdad52eef42284e48647a3395a688c5fadbefd6c66b7b912ba1f9. 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/TCJPN2197856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b160fa6b66066e4b970bcc77a3a1295a63892d228195391d36d63e5cd788e25. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TCJPU2210647.
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 0x043cd616517f8cf6912fe8897219707a36d2354edabee657f1cd20a507e1b232. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCJPO2198611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15407dc90c666fef7a7f47c94767645319c7e2d96a1ed3351ce0aee4422365d1. 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/TCJPO2174657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbc76573a2d620fa5e00435e52d111555c64469ab7ed20b8b1fdf257b98a499. 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/TCJPO2174663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f8dc325b7e2055eff1680c5f0f16652a5104182b02c0c40b76f1ecebd42892. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/CALVP1947134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fb30f0dd3a18133e806ade98a2fdf3d3fda56e65b595b2d36f8c8e1aecc4ea. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CAGOO1991864.