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 0xb94993a054b9794d5dab0dfb2b4291872d7bebb999c8b7021e88f765df79e8a3. 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/df7d9c61-f6c2-486c-a42a-0da856ff4348.json and https://artists.proofprofile.net/proofs/artist/df7d9c61-f6c2-486c-a42a-0da856ff4348.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 0x0e939f2dc01e7b62e24d79f89f50d6285d71222766e99cee255581f4b92124f9. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:50:32Z), 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/JPE560901277.
A Sky Who is Being a Bigger Crybaby Than Usual
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40065af07526014eee9c05384a20546106d350e3d467faa1dc45037939279987. 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/JPP301500545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ef96c0d13be21c6cb76c1400e99e3100bada5b4ff22bd862c9ecc6d84e0995. 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/JPP301500550.
羞恥心に殺される【10th Anniversary Original ALBUM】
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a39a106b05a878f79c246018d1e0332ec2c97943d75bd02bc88f48d5f2c80b8. 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/JPI102000579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf3ee021c3fd0720b53f75d9ed5d7fd7b33bf42f2208970d1c5ee00f3c5a80d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPI102000581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250626727d520069af12679fb4109d369adc61adac868256c31afd700b27f8fa. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/JPI102000585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b961ad659ddefc77fe1db4b841dc680efb96b226ce5dede55f12cb8cdf5ef9f. 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/JPI102000555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5314822789fb3046f91782f97f78019089a7ba958f026e6f27b6c6db9b371910. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPI102000557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7221dba9b10d4f73099454db857284fcc17429e7d05377eb2fab6c031e3044. 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/JPI102000558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c650748600a3b58f40141766b70d82137391d776e394e3e942d29bd65f3d5b8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPI102000559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f38fd43f4eee5510c499cbb642b74a982651f711838de3388f31a22a2fa9392. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/JPI102000560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983f9cf7a39b1bdc3c07066b4be90847f622deefb7723d88888f790c11a25ba8. 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/JPI102000561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f783ef8c5ecb00ff305d0a2e5c2d9ea5c1711903089a4906f6bbdc5f7239b83. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/JPI102000562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a16c6a38e574596ee69e55bc2cb3f8d731002b4a5e75cdcb4314a313e35b47a. 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/JPI102000563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7701c6f0f88bbae99c5531e7965f7da03f160cf5dbf8154540d11aec08f6aaa5. 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/JPI102101232.
Ateinrelation CHUNITHM Original Sound Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe4168f58310fb30d53de4446617ada8d320632f65b0506d22d2f7c3bf28ccd. 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/JPX301607960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e96944992714c09107c6139c4de127040a5bd0d867a3c1a960f299d66fde32. 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/JP92Q2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644c33d9708699a6a83b35af9377aebf6a41ee774c77a7ab42d748159b3da4c5. 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/TCJPT2214034.
Kagaminext feat. 鏡音リン、鏡音レン ―10th ANNIVERSARY BEST―
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5664c85977b119f9df53bfb9828696bb4b8e0258f452f0fb63241f597f5aacec. 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/JPC231700375.
Utakatarelation CHUNITHM Original Sound Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0429935fad9608f1c68fc5e01a7dc946da837782db5bbfbdb8056c444e1a576. 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/TCJPM2078891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870378a19320869d9bb7c4cc729bc33f59b81d2533bf1c81e26d0c7f24226764. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:18:59Z), 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/JPPI02302460.
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