Chihiro (ちひろ, チヒロ,千尋) is a female and male Japanese given name. Written forms Chihiro can be written using various kanji, which can alter the name's meaning: 千尋, "thousand fathoms" 千博, "thousand ga
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 0x052263541d9a90c460acc16a4db54f483dcf5ea289c71beda763964753aa0abc. 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/62f80e85-36b7-4c4b-bd1a-bfd3bba48dec.json and https://artists.proofprofile.net/proofs/artist/62f80e85-36b7-4c4b-bd1a-bfd3bba48dec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
カードキャプターさくら ソングコレクション 1999.4～2001.2
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 0xd80b4b8aaee135021f690133b298948442fa4080ef3d81e40fd434e39a4dea17. 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/JPVI09907960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb6842707b0a230903effb7eef093f133cf81986cddf267120e8efa66ad5da5. 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/JPVI09910540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b12a687ae63dcc18f70643363556f2b518dc3c785fe363c5ff867ac5e8776a0. 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/JPVI09910560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887973e8a212962862b082a053e12cc90cd07a65bac02226ef8fa0085d68520a. 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/JPVI09918470.
春宵情歌（さくらバージョン） （春宵情歌）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6d3675cbf2a0ed13d2a515ff91040ad477d2a12ac4f1901396df454b9b8c11. 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/JPVI09921960.
春宵情歌（中国語バージョン） （春宵情歌）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09800cca2916cc58f8e66a41ef06e1371d9efc14a2e60ff72e255eb8896b1c0d. 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/JPVI09922070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282b6a036872627e9a0a6047cbc6973ae8e79cd4c17a5b979bd90092e28baabc. 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/JPVI09926580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caccf5311849a7761eb25bfa4d1281605893e888c7abafdf6505169f8084398. 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/JPVI09928100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc669a68fdfa68c10c28ca395bb5ceb706d7bdd4329dae6a0df2c42a86c0a981e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/JPVI09928110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95528587b9dfc94015a6d1581e3c2641abeee3785da1572495c4ee2e1647e82. 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/JPVI09931350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad84819e06efa14c4587d51d992f2d9344368057609e340be207c842aa40b0b0. 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/JPVI09931360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc3f76ade782d227ecc633806bc11b204ac22c03eab8b5f8fd5de28128f1bdd. 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/JPVI09913180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437285cdbadf200e399c2ed559abb321d111e88afa95b88e527baeb34859e955. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPVI09931390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbe1923b52a0c4e8825ff289b13572432de9c55a7d75c21dcfe092fc0db3016. 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/JPVI00012640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28281d4a39cfb275f4bf2cc17a46dd05fd9e53277034a3a3ce068df45755159c. 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/JPVI00024030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b42c01033939d94d72e8377f7fe4c37ae394938c6452bf69f176c74f7df32f. 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/JPVI00023130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ba69597fe70463198b04a0186c1809eb7cd30c6911a42b4c2043de93f5f24e. 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/JPVI00026110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce9260b4dc2779e6e34d2137fdefe59716feff40ca808e72af49bf2e2735720. 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/JPVI00026200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3781eea0507bd1281ab4205137031f6c9292afc1b8a773e0d87fe4d5b9fe601d. 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/JPVI00046740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc483faffec1be03ea4ef4a1e77edda79a6ea249531c428416fd1bfe99d1670b. 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/JPZ921714984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c16205b04e5d324c767e6aa940e8e518f3c34679d4b0c99e83a522374d9bad. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/JPZ921714985.
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