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 0x684dda7a72aa0c8f7d7b4636e0c510c8b1a22c49903dbe1b08da7df0e9306d31. 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/e7d6d5c3-157a-4340-bff9-46e91a29ee5f.json and https://artists.proofprofile.net/proofs/artist/e7d6d5c3-157a-4340-bff9-46e91a29ee5f.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 0x2b8440f4d490c472db7ba6f3f84e3b7c27644c23a6d51f250ac05e1fcdf57260. 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/JPW562111926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d6724f1f6c9b21b28e7bf79536bbc7e58b467ebe327ec40ea09af1ce3a8581. 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/JPW562111927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ba7b0714ba29276a2912466c48e8bd633cb872b283b2a4cd8c6d459a4e0eeb. 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/JPW562111928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646364fa2985f878714d46153a296d0bc5d2f770626e82dc5603a2b12efe60ed. 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/JPW562111929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b8aa06ac5a556d0f29a9c6b72408dbce1b36679d61ac69eb2ee0c15f3be923. 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/JPW562111930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c67adcdc0145fe1c13d7e2f9f4cd3cda3b62368a53d6ab983ea139b74744c4. 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/JPW562111932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9a23a7ce1ce2a7a84ab104a28dd18162fa29f566d9cfb0bfc229fa46a3646a. 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/JPW562111933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582ed511e5a566e2e999b08c21942bedaaf43bc7cb942e016ea880ae7e9771d1. 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/JPW562109308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f1cbdd9a746915c220e03cd768b82951ec6b4e336fdf84335bbf8e4658da1b. 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/JPW562107626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b9b2b2e16511c4b391bf463d6824127e6d123d45054fbca4593892b4a36f0a. 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/JPW562107627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f9af8b07f9e8ac0a0a426799ff2e3eec7d7a78696d9a9441cbba82d8eba36d. 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/JPW562107639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4754420975423cf697e1523bd1b015724817587dcfb9734045aa13a287ed6c. 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/JPW562107599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b457afd903b61d6c884c6dac8e713868671b635735c8e6295adcc79db6d919f. 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/JPW562109904.
壊れた人形のマーチ(ちょこふぁんRemix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce2d019d132a032ee221a97dee20fe9a4c87593243fa3334a0d2bbda2f010e4. 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/JPW562109907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d7ed097d480d19a4c9de884d832ca0dad4e37a8cd8aee7533c28e32528f7de. 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/JPW562109908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29888b15b8912f2e6be8bce7683048bfcf910bdf70534ab0480f20d390410042. 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/JPW562109322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a97f77b981f99b3e9fd25cfe436dac78db62a548257feaccc77dcc54cfa222. 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/JPW562109325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85958fd1a7e2df84e216fcc449733522c22f3b65e5b1a00b93901682de05c937. 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/JPW562109321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6a108018393d5a7ca1c063ce0762139fcd8fecc973710a37876d7137e5db10. 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/JPW562107650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50f85e337bef52bb9e23b408d3fb62b035cf05bc786a7722580633c6a33f941. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:33:58Z), 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/JPW562107651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c597ad7076448287b6dbd457509570b4228a6c2ac4f4c4c28b7239ea86c481. 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/JPW562107652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b4b44992ca12ded6997d7362cf8a24500db818b24affeaa4354feb4923afe8. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:04:52Z), 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/JPW562107647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b4fbcca535e1d49cc91168052f71d8f7ec14ed3c63f1d2736b0d22626fe518. 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/JPW562107642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451756d45b2c18a9ef826c49a7b9af8b2d4b116197e87f32d3a2b597f759da91. 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/JPW562107644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd870226b0a82cf1fbdbd75f6f034f09b0726ceaa87d1559df9aba4280ead923c. 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/JPW562107573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac64aec77bd8c4e91437ab12ee83ed4df11deb04917b251efa8f16a3c3d6f67. 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/JPW562107568.