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 0xd51eebffd2406e95452619b459ee2ab390ff1a6505486401c0789314c611031d. 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/76eac30d-f344-4694-9d06-e39b204cf32d.json and https://artists.proofprofile.net/proofs/artist/76eac30d-f344-4694-9d06-e39b204cf32d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wasureji no Kotonoha - 2022 - Instrumental
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 0x40bff4d96eb1a1496f4353af86eab7cf6e07acb29a9bc07b47aaf651a997cfda. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCJPS2290218.
Let There be Light (feat. Kiwako Ashimine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99df91f855239ca1cff571c332b21fcd8b4d77de7f3c446e72658e4f2e52a529. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCJPX2309406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9064ce4d9499efb40cd7a0c4f58995c3323c76f48f10fd8672d7810d4a3223. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:48:48Z), 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/TCJPX2309437.
The Old Testament in Silver (feat. botan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9b13fae4281a1f970b51490f9139c53200183c48cb3dc1966145c85aed1ab2. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCJPX2309440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202fcfc0b1a364ba7e899c530c936ff0bb7cd093a53b35033e25c0fa79892e16. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:24:42Z), 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/TCJPY2359404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360f6f98c80d586e48687f583407d15faa146e30d4788cdad1f23a9177a2447a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCJPA2471508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e876dc4500c006a7206757f6eb5fae840e9b58c76fd62fcdf04101b63923675. 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/TCJPC2432537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d39509db50c303561be4b7943c70ae2cc02ed0089b1bbb9f3ed7da54c9067fb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:33:16Z), 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/TCJPF2542642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926b791e081cc288af3d54640887a3b28f8bc1061f5a261af86d6b3990d2cf9e. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:19Z), 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/TCJPI2516106.
Odori Odori Odore - Dance, Dance, Dance (feat. Haruka Shimotsuki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a30f4c98243b70687f05ec8cd30b5902ade4bb1b6a6089205f97f66a603426. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCJPI2516695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef70268eaab393bcd4f06400d80530fcf38f9d3098a67d8f966fd73d7aa1249. 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/TCJPI2563187.