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 0xf660d93b4159c90c2ff370ff5bea5185a819efb722e3bee79ec0f0e410b00c43. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5ec5e83-c6ff-4518-8d99-ccb8b4d6bed4.json and https://artists.proofprofile.net/proofs/artist/c5ec5e83-c6ff-4518-8d99-ccb8b4d6bed4.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 0x07d92ad52515081a39169f0367429509a9ccbe7716c0cac1ba6ba7ae572fd4ec. 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/JPW561909550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d41f7db6b57b02fa4a40bfe3a8216ed07e169fef749c8907186620bbb28057. 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/JPW561909583.
Spring Spring -Four Seasons Library vol.1-
Flowering Summer -Four Seasons Library vol.2-
FALL FEEL FALL -Four Seasons Library vol.3-
Chillout Winter -Four Seasons Library vol.4-
Pieces of Seasons -Four Seasons Library Extra-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010e073dfcc843b9faaf16327487f4d93756d072b00c738b2a5aa5b3039e34ab. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:02Z), 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/JPW562004607.
ワンルール・ゲームチェンジャー
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735b19dd8843aba19806ebdb010c60459997c63aef89ee370fce508e00a56033. 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/JPW562106993.
ショウジョリロン裏アーカイブス
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e695a1f82c487b4936fb74cc151627c35d85e7bb585d32324b43b00ec945e9. 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/JPW562107814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69699624ca94121d0734b07d149723e9c56b986331a377bda5675354a30c5a4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPW562107815.
ワンルール・ゲームチェンジャー Covered by AbsoЯute Zero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1ec65a5623ba4393e2568c61b5219cc8501b346131d4326d524eb133473895. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/JPW562107816.
君はもう王女じゃなくていい Covered by 少女理論観測所
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9599936e4bf622dcb1569142f03d998bf3ae7e040d04ede216784e1b84ef296. 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/JPW562107817.
ナイト・オブ・ナイツ 少女理論観測所ver.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd096a3240a37c5f7f2ae6e8049757309d2636f82573c4e028fb3c87a1c16255. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPW561801129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805d79ce2a9a274958d4317b0b92584ac90ed1e15591e6fe9564181ab0917863. 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/JPW562103237.
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 0x67309ba8d56984e23f91c0db3986c1234327892df71cc063f7282b4cc91cb216. 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/JPW562107818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2754644dc667ce49b5306649fc187960f564e069f90717b60ebe2b01875fae04. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/JPW562107819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ff2e2ece13e2f21de32dc265a6887fc709b91d678f3e1293e3609f3b0a5e82. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPW562107820.