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 0x56bd182c328a7ea5c39712f1dfc7db572945b99ba848dc18089e0ffabe323119. 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/48058bb2-fe9b-4df3-a849-cf8b4cf6048e.json and https://artists.proofprofile.net/proofs/artist/48058bb2-fe9b-4df3-a849-cf8b4cf6048e.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 0xdf3ef42caa1d19610cc7d35bb3a14c8f903d442fdaacfae36f647032a1e7885a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPSR01101101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4056eca5af81c8af001c58e57d118ad30b665db5fb0d2cd731e0a9c7b6e9ed4f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPSR01102161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867fe4da9564209b74126cf4de6fd1b2e4469e9a46efcc146e9f71e5b137c885. 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/JPSR01003787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a49acc8f242b92abd9c1d5a2b49223f2e2ab7eeb633252024edc7a2d05d49ed. 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/JPSR01001141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d0c53edba28732f6acc59cc53af66609de7d12385724e23b260cd10d9f95c4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPSR01003847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c6e5053493126eb386e8d0190928eea6fce89608058a9781249544606bbf4a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPSR01102167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ddd13870aee631e6a55de9b50442aa42ced56e9f1b7adf1651539a8852eb30. 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/JPSR01001641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6039464f46d6100a35aa438c37da73179ad1c8ef76d1fa6a76eb5c3f1e924e39. 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/JPSR00901681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb513e9dc6d52b86d7fa958c2fec1688c6525513302aa7b9696cdc4d272611efa. 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/JPSR00903001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18dda59b3375074929d4af2a0f3aa3f202305cdec97d5e4dec95d293730b079. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPSR00903785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f5c24e127aee99b922aef58544fb095f650e2201b83ae3798c516301ab13fd. 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/JPSR00903788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2647805939e7406d6a261dc95356c9956ce4aec8d6ba8d735ab8ff4a92d2d8. 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/JPSR00903401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe1c0daac16b73113ba00de9ef49076c59b1c10d08c2238ffd6b187abfdeffa. 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/JPSR00903789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40c8309462ae312ccaa52ebaec40084b5dfc56eb5f9b8722d765d4f59aae56e. 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/JPSR00803521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4aea8e6b8926a5dd8e2a39142c3129d9c5e43ebf7e06e4027633d59837a504. 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/JPSR01201081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebc810bf452c3be53c8924b30b6c5041ec8a589b8005088ae23ff5556510b0d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPSR01101261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8568eb1563f09c000858ad911770a66d12fc55b14ea2a41452651570c784a869. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPSR01101262.
ウソツキ/もしあの日に別れなければ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6039464f46d6100a35aa438c37da73179ad1c8ef76d1fa6a76eb5c3f1e924e39. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPSR00901681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe29bc488bfc7996b028bda794007bcbe4d686ad41532e45456a89ec5aa50922. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPSR00901682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70623d899e1193bde566b61231caa2b9c7b560e7f52a60c23cbdd77445826f22. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPSR00901683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40c8309462ae312ccaa52ebaec40084b5dfc56eb5f9b8722d765d4f59aae56e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPSR00803521.