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 0xa1d2c3a9e7e25cb0443e7389ce74c20c2009666303a498424890f9919d32f3d1. 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/392dca9c-7a68-43b2-9e7d-8cd1d0f24b36.json and https://artists.proofprofile.net/proofs/artist/392dca9c-7a68-43b2-9e7d-8cd1d0f24b36.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 0x201388aaa1da4f57ef8112c2a8a1cd3f147daab5fddb08e0b10280522b5ac1d4. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/TCJPS2224888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c22b0e30e9d16e6107837874bf8f7dbf7a9c7289074594849db31d863124da. 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/TCJPS2289332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202856d5c775e85d40cffbc24e71e2e133741f718342a64862a9ec69a87dfb91. 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/TCJPT2217150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9046434569692b1b22e547acff1010e0d2860ce8b52c48cbaceaf9ad7d801c7d. 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/TCJPU2201201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ed9e0b1a95421c6de7d12418abc51856649aaa9d6fbedefd65eab605d24834. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCJPU2201196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3f2c0e60aa62b1964b7f33c35dda081716baad85e5301867449082eb6191bc. 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/TCJPU2201197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbafabfb056ea5b4a148b08f18604513e9aeb9b591f72490a9d81d358df50b3. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPZ2424692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedca491c4b33ff2cbd84ffc69204b98e3ae9b77a9831c765617fd18cb02bd38. 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/TCJPZ2485768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16261b826d9ded84655915ebbbe0933ff1c084830cb0d34ab61c6225323ec75e. 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/TCJPA2415831.
Kawaikutegomen (feat. HoneyWorks & capi) [arrangement]
可愛くてごめん (feat. HoneyWorks & かぴ) [arrangement]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf96d910e1cd76fcbdcf2d4a3e2ea1d1c93a2873700ba4839e1468c6dd8727b1. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/TCJPB2498649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8921b111b1d30f6bff5afde116c26fb9f73c1634cf0750f0a1062e218f7d04d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCJPC2498660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07043cfc1e5c7f2dff6d383e9184ab7391d031ef929b1ae36d796e301c5d6e59. 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/TCJPD2538024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b3ba369a72f8dd4693f9f0a1a810faa3649175e702317635fc1b7e5581b7c3. 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/TCJPE2503237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b3ba369a72f8dd4693f9f0a1a810faa3649175e702317635fc1b7e5581b7c3. 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/TCJPE2503237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d2dc38f92a40c19b88e97467027ef2f11e1226b9892b47271714efd07da221. 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/TCJPG2597055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf5b0415449f5ca93041a2f2604a7c28aaf2052e18cf39d4d186402a9d1ccc0. 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/QT66J2510245.