right|Libro logo thumb|Meiko Building, the headquarters is a Japanese book retailer. A unit of the Seiyu Group,"PARCO CO LTD acquires Libro Co Ltd from Wal-Mart Stores Inc." Thomson M&A. February 28,
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 0x9e484dfc0f4a1ee96b0d929429da26b13fa089ba419a04eb2ffb28967455546f. 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/eabd7c31-cd5e-4978-84dc-caf38a973dc4.json and https://artists.proofprofile.net/proofs/artist/eabd7c31-cd5e-4978-84dc-caf38a973dc4.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 0x18c6313a11f917e9990cdad249a924e57f036e08732ebc95ce17aa69da8fde6f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPV500702193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5106f4ca00b14a503c5404a2a36f033fc42f5e3144cf7f6beb6566e637c78b73. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPV500702194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6552afec1d92949c31ee397a371a3719a5325ba271b4ec51d27ea1113d05af. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPV500702195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89502e0660eb799c57d3f7d5431bfd84fe4f12ab7fef57ec9822f91782bd84c2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPV500702196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68a7c14667ed9739cb6fc863b1de078019a4bb8f433a9151a277ed6f4f4dc5f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPV500702197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0052a297798f0be5547deb64bbc41e8d0feecf4ed2ab368052ba53f92181c8. 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/JPV500702198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a540d008a37642559b409aa911ab941d85fd86cd49ed6722f828f9f06c98a7. 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/JPV500702199.
対話 feat.Momoe Shimano a.k.a. MOE'T - DJ KIYO Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bb6eb1ab86fdb531c3c751851092f225fa1ffb0af456918b964c28a7bb3fc2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPV500702200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02eea0c582f099d603a1858b64a3316b743e2f626c67396f7c2147e9e35e560b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPV500702201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420bdc83363c3a64254fac1e1168ec604236e28adeaddba3bd611f71a478b5ff. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JPV500702192.
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 0x1818798e777bfdfea4537eaaef9bfbff77ae906801515ddb58a750e1b5e92c6a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPS809902773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d8f622f28fd8d3948003c5d1468aa91d9217db86a9ae31ddf3192a1899ab47. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPS809902774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5eaf3094e9e17765d237595f6f3d4cfb9c6a2ca82cefd0ec16280319681911. 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/JPS809902775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d06361a4c6259f8c964376ead1db206fc56218c52281050cbff8d6f601b2b0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPS809902776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7c50a029cef0d9bcc2a0eea13f1b1713b85804cec8984562cb1afc92479833. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPS809902777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d542846367fb6cab195099697c6028f0740978a662c4cc1c2e3408a62cd5c9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPS809902779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd30ac69fe201471347b0d2303349a18aabd46c62aceb96aa3b0c53f9f9bcfd6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPS809902780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48968f294735ad4000957bfedca319dfb6237101b7591ed529aff77ee518d636. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPS809902781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1818b48aae7702101dd6f14b723de0132057466b32dbc7271036d41a0f37246c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPS809902783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364694e45008d8541a079b8e902673c5524267dd41f37fb0152e0b295995a474. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/JPS809902772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319231cb3e9e2e49cb9c728acec46155eb96b892a3faa80997a8b23a35698131. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPS809902778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7deb0bb3261ec215f2ccb07082adde6d1b9bb2fc4b54632455498a50e9f21e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPS809902782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403475abf77e62563ab9618f6f458e0429f1da944b2b51d751d8f42ec9f15a64. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPS809902784.