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 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 0x94fd722a53588b649257a1637841d6408bf32db7d9c18660c859d042ad7e6c9e. 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/cfcf971c-cecc-4acc-bc39-4a22c7008cbd.json and https://artists.proofprofile.net/proofs/artist/cfcf971c-cecc-4acc-bc39-4a22c7008cbd.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 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 0xe3ed358f54db4cee0e56dca1e8d173f2d8618bacbd7c772ba8f305ff80741533. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPB600531003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c8f4414ab6d675e2236361b72fea5f4526761c522482cc6ffb42b5523b2360. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:05:36Z), 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/JPB600531007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9cf0751c204053a5bd9b03cd66f933a8b5e250b3701a3003faa296049ed9d8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPB600531009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded9e82e3bef7cc46956ac22a298ef3cc91935fa397c36aa6576f25b8ce0a3fa. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:51:35Z), 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/JPB600531011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72528447d2bbf2cf8249889eabf07deab6cd16b177f8ccff17371726db7c5bcc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPB600531014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19eceb6dbc3779ae28f2ac567e2ee48defdc9e76c05069fc33eb784f7ee754f2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:45Z), 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/JPB600629403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4106975aa0700b119b51e11916fa21655215c8d9d2d6a8892ee3a1af10b3a4c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:24:12Z), 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/JPB600629408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23f7f35519e64ad185055e6b65253bafb13e7e01b25eca574824062771b7f22. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:21:46Z), 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/JPB600991188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9338649fe6783dba198daaf753791435726544849e73c5ce89e2a446ef33a097. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPB600728304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8343a74e67361aeb42b0f7491543e126c6a7aaebf855adadf9547a8797fb2067. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:05:09Z), 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/JPB600728312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad506f8f75b0eed92e877bd56e1e40e681b745ebe3bbb56056b5742f4b1c83fc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:18:12Z), 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/JPB600830308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787a019be624ab7ced185373122fc81c858ff31f0a3e56c6d13060653642f30b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/JPB600922301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb1f3a6904bb056faab3fbee35dcab067723a182dabcdb0e6e6183acd2c9e30. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPB600531001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27eb4ba75c1b048d9f6bee61537610ba12d276bd7dbf81e5f7464f545fc6946. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPB600531004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9614dde480ae4b6083c7cc3d7aab94b8e6d6db448b10c940e22d3599533bf02. 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/JPB600629404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd69a0cd2a0f565aa80563d4b48ff8b55f1ea0515341d9cd42b5dfe1244bc79. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPB600587401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee88f3ab61f65e16d7e6e6aec27dfecd4742fe5c715138efaf8c8fe976b974a8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JPB600629411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe168bcf0b0419c202c7edd4d763345dd1920a0ba7b7a9003765aec9b3ec3a486. 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/JPB600701102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3afb80e4f2244c6dfe7d106e9a86793544818c3e11b6d4e16806fd578e3e56. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPB600728305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9338649fe6783dba198daaf753791435726544849e73c5ce89e2a446ef33a097. 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/JPB600728304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060c671a96ebf40fb232084afdac41df7d913dca6ac5db8f45d0fc200fb5f519. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPB600830303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f1e088059b13b8327382898e3ce0c9726a35964fc0ed919dcc3d6afda50a65. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/JPB600830301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e75eab61b2cef15a8130046fc5234543507c4600a2de291831f6bb2d6215e7. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:02:55Z), 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/JPB600922309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0716785b7f98ede7f3fbc441115489c5dd0fb6ae9b8424a888ddc23679d0190b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/JPB601045901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc2ed21c0bcd581ae8094f0725935ee0b70a0ce076fa15556e9abf18b5491f8. 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/JPB601045906.
言えなかった「ありがとう」/アンコール
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d793aa42de3fe3067c8e7870e5daa5a5560fe4809c3e58559c10ed4de872bf. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPB601102001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5deb62319437c6da8b4f6c3081252794e7cebbebd37b692578c566bf94e4098d. 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/JPB601174701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e75940d9529153d1ee525409039e96cb2a361a6ded21c2271617d37d1e2336c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPB601102002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a68d5d9971ce88ee8ca1bc7d9d1d8038c6397d55c2563469da1a629871acb3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPB601011201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e76bae5a5999482c6561f522cd25d5254b6c8f0481fb6d5a77e80cdf39e6655. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:32:35Z), 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/JPB601011202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756da48e322ec257ad5e8a718bdc19d4a81b9aeec3900ceeae9e3736a71f0567. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPB600493505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26a006993e4ed7a1ad5fbc683acf912bd8655bc58507fbc87ff09a7f44ab087. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/JPB601221502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9024b2be9476fd89ef6d6988495d6993c56e5d436cbeb9ee778cdedd2c4cec26. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPB601221508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7bf90c092015194cadc1c7fa64c238d285196ed56f355f1cab30e50345d880. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPPO01217485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7bf90c092015194cadc1c7fa64c238d285196ed56f355f1cab30e50345d880. 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/JPPO01217485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dac7da6fd5590acec6183232c8b67fa2fc771f66a78cc7037b86bf0d5ee9dde. 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/JPB600531002.