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 0xb1ef4d6b0562ac98b189ca436d67556fcb0b47cb134d2927e30a7cc52a8b9168. 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/102044a7-3e70-40d3-80d3-38de340a4669.json and https://artists.proofprofile.net/proofs/artist/102044a7-3e70-40d3-80d3-38de340a4669.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 0x21878daca62cf2c41ea3662ab6ad3cea51fddda087740bfaab0229e2938a33c2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:53:48Z), 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/JPPC02000994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5da8cdc16b3d42c95da95b94a190006ee37dae26ea707ce91d92b2b54a6a2a8. 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/JPPC02000995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf289ede415f89b4f4bd578b3cbb274b37cc6624d345c2bab78bfa2b94df03a2a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPPC02001872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15d59555d20c7a4ed9ac653dfc1d28c6345ab10878470afa00dde2c8371f3e4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPPC02001742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf289ede415f89b4f4bd578b3cbb274b37cc6624d345c2bab78bfa2b94df03a2a. 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/JPPC02001872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d77f99d939e1867bd778e630c1d06d4967759810e8b84d659216c1bf6bc0dfd. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPPC02001999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc408c109a8ddbf30a611db5965a01449fbfe762e408ca46c71c20339b5f655ad. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/JPPC02100955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecb0d03ddc0e813b77c34fb012d3fb794c31b559b0363f459c4d36cb5764495. 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/JPPC02110511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf841552f8beb02945b2796d29d4bed3e4066d8167fae8098a0a3f6cc83a39d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/JPPC02110951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc408c109a8ddbf30a611db5965a01449fbfe762e408ca46c71c20339b5f655ad. 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/JPPC02100955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecb0d03ddc0e813b77c34fb012d3fb794c31b559b0363f459c4d36cb5764495. 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/JPPC02110511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf841552f8beb02945b2796d29d4bed3e4066d8167fae8098a0a3f6cc83a39d. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/JPPC02110951.
カレーフェスティバル〜パパティア賛歌〜
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57058ca523938526b8fa118471edc1e16e62bd97979766c3328e7917c36bf2e. 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/JPPC02111055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc408c109a8ddbf30a611db5965a01449fbfe762e408ca46c71c20339b5f655ad. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/JPPC02100955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecb0d03ddc0e813b77c34fb012d3fb794c31b559b0363f459c4d36cb5764495. 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/JPPC02110511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf841552f8beb02945b2796d29d4bed3e4066d8167fae8098a0a3f6cc83a39d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPPC02110951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871ae13e27e480b81c67a0af830e2e6e3491e32a4d8155b615735f813b008223. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPPC02111056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c270570fcb663d9b859be5591e6bdb024b1820f95a9d48e2e02c60e7ea0a6d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPPC02111721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c270570fcb663d9b859be5591e6bdb024b1820f95a9d48e2e02c60e7ea0a6d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:41:13Z), 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/JPPC02111721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601b1b6fa84a105c865e5d832b75e9dd9caba5d269294b3d8d6a339c5894dee4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPPC02210054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601b1b6fa84a105c865e5d832b75e9dd9caba5d269294b3d8d6a339c5894dee4. 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/JPPC02210054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956253b82496498062baba1d1c83d0b3af26787a46259c8f06910395222b8de1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:10:40Z), 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/JPPC02111829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54913f178728167812406acbfdb19c1f65906d6716428dfa81c729f1b63ed99. 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/JPPC02111830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54913f178728167812406acbfdb19c1f65906d6716428dfa81c729f1b63ed99. 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/JPPC02111830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918a8bf28a73caec602e709347c65078cac40caa85dee12fdf0d041948993875. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:11:52Z), 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/JPPC02211335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7320d716245fcfa98a2fbabfdf47a7607bb7f2c3dfd42cc7b6a73e80d86c093f. 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/JPPC02211336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048c677e8ecbc1be75683830e4cac379b7744716a6f586b8fd40efefe7dbfb94. 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/JPPC02311231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d9cc3011910cbac282971f61863bca0b9c3f8e102c9c86940f1f37fa6a0d1b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPPC02311964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfa6cd1fe8a67654f5c143db5624b9c5b922488d880a0181ff2349b915cfa5e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPPC02312088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d9cc3011910cbac282971f61863bca0b9c3f8e102c9c86940f1f37fa6a0d1b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPPC02311964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59afc72f76826b61d4eeb8d9c9d643406585988695ed14a338f92739d209936e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPPC02310181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46b236e23c526680cbdf992fbd62760d44b26bb7742d820c75f54f03afc4cd4. 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/JPPC02312092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161647830959f199e0cf756560ec5de8e79437d501ce6dafdeb5cee1673f3aad. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPPC02211926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1af738b47701fe8dc1c7bc5488158ff32f01de5c897e7e01ec27836a6d76697. 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/JPPC02312094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348de1a74cdb8902e18c28665339c88532548ee51d8934641241557bdccf30ab. 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/JPPC02312095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918a8bf28a73caec602e709347c65078cac40caa85dee12fdf0d041948993875. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPPC02211335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048c677e8ecbc1be75683830e4cac379b7744716a6f586b8fd40efefe7dbfb94. 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/JPPC02311231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7320d716245fcfa98a2fbabfdf47a7607bb7f2c3dfd42cc7b6a73e80d86c093f. 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/JPPC02211336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfa6cd1fe8a67654f5c143db5624b9c5b922488d880a0181ff2349b915cfa5e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T03:00:25Z), 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/JPPC02312088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161647830959f199e0cf756560ec5de8e79437d501ce6dafdeb5cee1673f3aad. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:42:56Z), 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/JPPC02211926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1af738b47701fe8dc1c7bc5488158ff32f01de5c897e7e01ec27836a6d76697. 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/JPPC02312094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7320d716245fcfa98a2fbabfdf47a7607bb7f2c3dfd42cc7b6a73e80d86c093f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPPC02211336.