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 0xe65f7cd1efa5f7ea567bac278da8d75f6b65ad49eed3e5cd8a9015662823918c. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb882121-be85-4de9-8990-aea198072cc5.json and https://artists.proofprofile.net/proofs/artist/fb882121-be85-4de9-8990-aea198072cc5.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 0x56c0028a59ae1e879c05b325e5d5f2f50fcad2006fd19a990d81f0f886fa174a. 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/JPKI08177788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a943133b8a61974e173d28ca7ae3531165094c59a2b93d82b960801776fc088. 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/JPKI08177780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4057891bf07fb8fe8290cce50c8021043ae69c45b1c627a962c6d679242f462e. 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/JPKI08177784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd295820627aa80a535d098f65e2cb7b448162507f8d293c8a80353d1ba5cbd. 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/JPKI08177782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb937aac6f5b8b22eecfabb7b9e9fd8b671b0fe275ba6f65b0606d8cbe13da3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPKI08177783.
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 0xcb0026b7ba09dccda45c108e48e11aa475e9d89bd23c8cbef93a38a1ada619c0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPKI08177781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f55c88ffe6fa7cf22745bca2abc95fd70f198e79daf44a8832e7ddca4eb6cf4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPKI08177786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25c2f2d8c8665df4623d8803e8a756d2dc39fe060b25758681711f890578795. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPKI08177785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad5fb81c5528182bbd4bb4e28ebe7dc6eb3e22b1112a12e03b78ac387b729e1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPKI08177787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39347252b7c187ac0dc94030a666f0aaa244566dbfa7e8d96916677c2e65091. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/JPKI08177789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841dd51fa6f9da9901d3c24f656bbea7086dfb9dfac9f6e26d9ad91566c4b3ec. 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/JPKI08075734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ba2f45f98ffed8ca0f1f70972ae10e974037ffbb8fd39c6a45f258f50a5d03. 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/JPKI08075733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fc665e226b8dbaa2c019c05b7646357bea355a2c1e6dcf23839ef0e27207d4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPKI08075728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31136d4e342233e0f902d7251b688134df206bf15eeafea9e92e6b6eeed9806c. 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/JPKI08075726.
桜の国の散る中を(会田哲士君の霊に捧ぐ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9b9bc79abdee12a6b8722868d12c1ff62a1381b8eacd3fbc6bb5fa175c5a6d. 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/JPKI08075730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7510adbc538020f6cc45f67b8b4b736ca75af6e7fef5f34df096e135687ff100. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPKI08075729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3def62b4c708343152b9386a783717445d098d615d297948bf62ea9cf1ba696. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPKI08075731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb85852289e5a32ffda63a3af0539cfd5f582d83bf16ae65ea7c5e224483d97. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/JPKI08075732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752c267e3117060810b84db0799a56d5d2731784d98fb10d96a6552c7098c650. 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/JPKI07912290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087a18a5947784c3c5603f2a0f907104a98daab504ab6cc3982a965a4724b6df. 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/JPKI07912310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e73cd3c8f1901964c0a3792f2116f825e80b9c9b4b48b2de49917342a3c70f. 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/JPKI07912330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaa8e492a5bf504ea2398956d0cb522acaab6ae58f75bbfd6de02de7946bf3c. 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/JPKI07912340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ebcdfef95569a8b5b6dabae695adc4870ef9a18828fff2e1cac5f6e241737a. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/JPKI07912260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0a641f6aef083cf3c81171bba917b8203bad9ccf1d8cbec6d3293f4936ea1d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/JPKI07912280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf329cfc85aa9fcaf3f6a8d903d1cfffd6d6c445d0c2628136cb833a4d804aaa4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPKI07912320.
俺の裡で鳴り止まない詩～中原中也作品集
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4fc3b1d3972e8436289d23536f988066d7bdd576182ce45463d3009338ca45. 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/JPKI07811940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6761cce56d329e7f98269690a3def1eb18c14403e44fb918e9b29713e0d560. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPKI07812010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ed1cf0bc0e8aa743a2593e7729cbb197c91b4d2f68d3d96725f6d651c2158a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:58:07Z), 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/JPKI07812030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9fdcfcb82b1133fecfe492765f01d56bb428da252e87cb9d1844af38380cba. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPKI07811950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46331e4dd9b8a59ad6be6b2d8fba777d0f70c2847e5c328f291db4d8b832ff67. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/JPKI07811960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0674d17eb7f68a1dc2e199cdf4ec9a9fbaaacac5f342c740f5eafc029d007f06. 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/JPKI07811970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7ca59f841f47ce5540054c54625142b6af1cd675534e8be204f6e019b5a8ad. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/JPKI07811980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488402d47d4c404364885a2cead27c65077848c3116eecbe95b233872687e6a9. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/JPKI07811990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c916c39b827b3cc71a24e70884af847965a067b2c21703e8b8fdeea3ec9aad. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/JPKI07812000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8a67bafc8925a6a420f1356a702f1050622461d46084e6b7634ffe0a7bc76d. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/JPKI07812020.