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 0xbcada97b8ffbca795d58f7a1448d0048fca774739c427ced0db9ef7cb16cbc85. 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/33e39d2b-693c-4c7e-bc71-0631aa9c5288.json and https://artists.proofprofile.net/proofs/artist/33e39d2b-693c-4c7e-bc71-0631aa9c5288.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 0xacff8ab9f1e7a1fc8e9526a1fe94de9a0ca64a1c998ecdae51ac7fef25c6ade1. 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/JPVI02100700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22570199835ece8c327233876698128f78d4eea2c2ba82755a332a75e233b67. 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/JPM901800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584010746ef0f11e2f9173c009b62a7fa0dc1af359212d3d04462d02ff07255b. 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/JPM901800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16836c68aedddb6374c9632ebd070feda8c55fa2c79ff1f138456a955bf2ef58. 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/JPM901800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c5445063582e608df1d22fc7ce471b3bba3bd342f771bc60f65c556a4da92e. 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/JPM901800067.
世界はここにしかないって上手に言って
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ac06497d5143a1514cb84d78d80086027f11423247243cd197fadb9a131519. 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/JPK001700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e6003986d206fe52aea9767bfee62448b5fafa015116baa9df41c9b7959944. 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/JPK001700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6763f8c3135e526cf57660f3f765e2e7e1fa0204a2fa1ee0e18e3394ad232ba. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPK001700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1341a053ea1eafc8261b737b34b085990857800c27f60dcc9ca48cc12233743. 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/JPK001700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9952b7b414d3f1058900234c1e0b0bf67a4dabb3f55d9635c1910782b75ac07f. 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/JPK001700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce5549312eb13afd693dbe0011d8df607f17af13760aa205d8d8fb2188a7ad9. 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/JPK001700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24116c76b8ec4efec1826902cb5e0ec0227c0be3cbcf48572e55f0e7189aff9. 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/JPK001700034.
飛ぶものたち、這うものたち、歌うものたち
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40065415f33ef995334f89979a258ce29b4de64a3accbbe60244d36bc18926e. 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/QM7282450079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6398116252ea68d950985158ab39577d628e01903e0a74626607ca059e33209. 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/JPU902203175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca481f928e52877111215f019ae39e2853cfd46216e35f366172ee1d6347c8f9. 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/JPU902201258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e80c4a463f6708ec99d574ecc5c23263f50c0b0919a3f4c839103559f94c5f5. 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/JPU902105498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941c745ba595019aa7eeb89e991f1b4e931ee6cd13904284f563afddb31f49f6. 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/JPU902101901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9387eb9586e447a94c696ede98efc0eb3445be923ea1462baa0336d9f513ace1. 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/JPU902101287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3b35406d734c1ff7ffd4620eab69f8bae3d0a68a4b8b57f1c334373dc0ea0c. 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/JPU902100220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e164cae7c321b9c00df7ed55d67fc1fedad094ff5cc2a353043040260961c5. 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/JPU902002283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c70557bdfc8835e91e0584fe991486ce7dfe6565f004d3c093544b99fee5dc. 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/JPU901901794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8295edf58c4cabd436350e83026b868cec1cb72ba54b9b2e2faf8899cd0af1e4. 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/JPS801961972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119d43580b85ba4fa487891a471023f4f71aa6ef2b9468be4b5d8a10c23f9dac. 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/JPS801957073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf906260c91a1d09bd0a92b05e759b9c1a9e83b2a511465b2b267bd03bc511d6e. 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/JPS801962174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b2b660b646c01098963f88309da3367f2d6078211066ba58d84a0bcf405a31. 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/JPS801962175.