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 0xedbb84a172c6325ce8bcdbed204dbbd7ed8b2a2283ae4ac22b2ce492ca15071d. 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/b98858a5-5117-4968-bf2c-74da2bd4de11.json and https://artists.proofprofile.net/proofs/artist/b98858a5-5117-4968-bf2c-74da2bd4de11.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 0x953b8d126c5b74a19226e7f964a70283d0e5b0f0e6873f9c030fd5cf1e2aa29b. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/JPPI01651950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953b8d126c5b74a19226e7f964a70283d0e5b0f0e6873f9c030fd5cf1e2aa29b. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/JPPI01651950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc274d244717e85ffea5f46feb64313fab5c0ce9d816209a7f743b7ec07cc0c. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/TCJPN2048326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc274d244717e85ffea5f46feb64313fab5c0ce9d816209a7f743b7ec07cc0c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCJPN2048326.
キュリオ シティ (feat. 初音ミク&鏡音レン&鏡音リン)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3083c27bdc45807b2428859fd8cce7aafb355aef9c8c3fc896c68226a0606872. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPE562107480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d4411a5c8c054eaaa38e21f67f04c239943cadfa949d5d4d90b45228e4c8d2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPPI02100800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe664109db053b1946f16ff88b1567e2e55075518df218a6de15ca3b3bc33f60. 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/JPPI02100820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe664109db053b1946f16ff88b1567e2e55075518df218a6de15ca3b3bc33f60. 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/JPPI02100820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98171398f0d32b09601c3f13d25c44a2be6845d05d4c721b28eca3b123423d62. 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/JPPI02100850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d4411a5c8c054eaaa38e21f67f04c239943cadfa949d5d4d90b45228e4c8d2. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/JPPI02100800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe664109db053b1946f16ff88b1567e2e55075518df218a6de15ca3b3bc33f60. 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/JPPI02100820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98171398f0d32b09601c3f13d25c44a2be6845d05d4c721b28eca3b123423d62. 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/JPPI02100850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e57ffc668f7c45e1687337fa30c832ce00bfa0359289ea816dddba77184034. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/TCJPU2359430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e57ffc668f7c45e1687337fa30c832ce00bfa0359289ea816dddba77184034. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/TCJPU2359430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cbc80be9073d1a40d187ccb21c6657768266d95750fbf389e555ddbc5e13d2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCJPV2337082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137635a9ef998782e2a287d0a9235a2181c0682e877b8217080b7db02fc40c64. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/TCJPW2307257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137635a9ef998782e2a287d0a9235a2181c0682e877b8217080b7db02fc40c64. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/TCJPW2307257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb19387211cf0088422b56cb48f60660aaa646bd077d2981c41db3027832a52. 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/JPA652306716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb19387211cf0088422b56cb48f60660aaa646bd077d2981c41db3027832a52. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/JPA652306716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaab2922e126c0bd21f5da52a107e7223c6f2f742228a9cf8eeeedc1ec781712. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCJPB2460768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaab2922e126c0bd21f5da52a107e7223c6f2f742228a9cf8eeeedc1ec781712. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCJPB2460768.
音楽的同位体 星界 1st COMPILATION ALBUM メタファー (vol.1 詩想のメタファー)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d5996c41443b74072b262c324be8dd6f8b0400f30c63c1c8fd6807d60ac9ff. 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/JPY392200477.
Exit Tunes Presents Vocalodelight feat. Hatsune Miku-Digital Edition-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98171398f0d32b09601c3f13d25c44a2be6845d05d4c721b28eca3b123423d62. 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/JPPI02100850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf8816be288dc95c61b9bbb649712ff43c46d9747d04f5faa6c5d4e121d9508. 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/JPZ922110620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0b832b7d57d838326b13f20b80b82e521782e9b9391440fb4281286d902df9. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPPI02302440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768eacadab41b051e837a90ab180ff0454c163c4583a956d74ac3148d95b53e8. 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/JPY392301665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcd936354ade2b008166ddea69526c4e707331af4a0fadfa6e1332319c255cf. 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/JPC231200791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2826649d0a72feeb0cdbe5683ae8c6852ca96142f341ab08fa3e176fe61dd1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPY392100287.