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 0x1210d70c390d706815df8b8329e21b2c45b4d4030b71e4128e08e9d738c3d3b8. 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/f07fd4bf-04f6-447f-b161-d90be704321e.json and https://artists.proofprofile.net/proofs/artist/f07fd4bf-04f6-447f-b161-d90be704321e.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 0x265a34d2fcc7d6e3097096fd0106991beca8ba886ec1cb5cb319b95188cf33a7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPZ922001752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bdad4a5ab9c512675fca84b44d0253262f1648ccf2099b610308ded376999c. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/JPZ922001753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3638cb883799b40b9b9f4c2e00f9e5ded0606d30a3db66f1f877aa244b8897cd. 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/JPZ922001754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ab7034ef97b3694a7ffb5c5743a797dc473c77a7b916149aceb2f16bea1eeb. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/JPZ922001755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9eab74eef4b45cc02e08d31c2bfb5612186d4d96e5c9f843b65f62bfb94f3e8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/JPZ922001756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8850dea9c4144ba3ace89867f7e80e14dc3a92cf56d1c575baf8fe55441a9927. 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/JPZ922001762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528abf4e9553afec8e31103d6b45e944d5b262d7ceeede9432b45f0f48989a59. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/JPG102100432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf291e297c8099886d5786e48b87376141b6543584d1e96011e7a689bc0d12f5f. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/JPG102100433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a1dfa47966ec41c9cfa941f870be4abee2b32c774ca1d80cedc803ae963530. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPG102200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a6c6390a4c8b42e1cbf8bdaa927f9fcd411b89894a0150b50635008f2c098b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/JPG102200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dd6ecef2ea19dc95c52a684329ff676f76dbc40c1726f4cddbc6231923c08b. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/JPG102200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447242194494faeb6bdf93c1c5bbcfb80f4a0fcaeba10acd0a710eda60b99566. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/JPG102200624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577d37a33b51dcf60051ab1ba7e655f4a0339a82859af9824d34b5e4573b2ddc. 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/JPG102200625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde922bab2eeff383935e67c04b54369e44473a74671ec150b49632ee6b21dfc8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/JPG102200626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc365ca41cbfbc92f38907ca72bb4bb3d729896afa98e5e9296d1d9d11868a990. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/JPG102200631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1759043501527292d115589cdca99873983cc51b98326ca1295a1fc35967a97. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPKI02213462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a0075baf2c9cfec1da13f93fef9da9607c4eba04bb1d80b575cadec48baaf7. 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/JPG102201635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978214a5a73828e373ee6cd4d33d54940c8e009ef98c1dafde3c9b55e8e59048. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPG102301474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d6abab8c90f47d4d8c808aa2eae67f2185246098f92eb44352508dd6d09260. 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/JPG102400428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973a42411df02f69b6ea8ef51e8693c4c72e455411328ff6dab766cf10a04238. 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/JPG102400429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384bfc7f10d5f4ca9e260a473f373eb3e0a84fc01c231b8754097ab11e8ce581. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/JPG102400430.
岡崎京子のあの娘になりたかった
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a62131f3b2aea6c8eb6b0c0776a118987231717bbd3a2c33504aa0340176ce. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPG102402483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87150c3831b301a8f2d42c01c8390942eae8950539629f848eb1c09c7f83b465. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/JPG102402484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac47e65130186f681042272d107e07df60098afd3012471cc8dcb6bafb18dca1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPG102402485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9ed8e70a8dc49dc485770ac4a56253be40e17457825a5c7f836861971e1e90. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/JPG102402486.