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 0xe0a0c71848df3a91d9ae9125aa652f21bd1825db34b1fe9c6c72fee3dc5e72ef. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a9517d8-c68f-4a13-905f-acb7aa672153.json and https://artists.proofprofile.net/proofs/artist/1a9517d8-c68f-4a13-905f-acb7aa672153.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 0x93b8ef5f45bff18ddcf350370153abffa6aeb2f0d480d04094922bccab12e843. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPE401100224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cdd26602536549c4c3e182c33dadb2fc0da188c1e4eb105b9c0599a611be4a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JPS101200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4434fff03d620dabc796cff45c9eca6785ccf3b4b1ce3e3bf090932075493c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/JPS101200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0092569fb82bfb54dc370cf09d57f6cf7ff6404d45ad5e87340809fbd8c078. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPS101200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2c5ea0f9f279dca8791b345451a5ffdc24f83d32131cfd795b64fc00f46973. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USWD11467273.
Mickey Mouse March ~ When You Wish upon a Star
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9587bd810ded204ac335806ba8b6ed623647b529ec35f01b7bab526e6112c130. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USWD11467274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde6a4ce63a14ccdd2512b594a241e1551150081bbad3fba73235933aee868b1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USWD11467240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45597164b5d1b3d835bc0aba1500614edef026ab82834d135630b86947622be. 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/USWD10935791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f134fdb220495c629c0a2e26ca60056ca671b32217de539d31fbf37d945f08. 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/USWD11467237.
ベートーベン / 交響曲 第9番 ニ短調 作品125 「合唱」第4楽章
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad5b8353b057432759f646d5d609f3e2afd2874edaf4758646425dfa161754d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/JPE401400357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff42949c92dca2ad509132fcc745ad9d650c3ac5cf883cff53182cb0ab8c506. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPE401100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc826882708cb23fa9d1710c19cfb8a1a263ed26744115ed513700ae80fabea. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/JPE401200269.
ピアノ・ソナタ第8番 ハ短調 「悲愴」 第2楽章
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef6a22c4a0cdff5718d372a114c466097d86c263761229bc1eada73b8d3f239. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/JPZ921613515.
BEAUTIFUL NIGHT… BEAUTIFUL MORNING. (Re-Edit) feat. →Pia-no-jaC←
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad8543b6506d500dc95f466337ad64caaef95902c0c77c00b8582677a087a5d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPJ901505430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5747c1039659caf6f0c6cca515612682e592d4f9973458a4921b19966b13bba7. 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/JPJ902404690.