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 0x2b5ed312a6b2dd2ee1d2379b77584e9b9c8b3e7f91e6f81095e63ef94ce65b6f. 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/70372ec7-d9c3-429d-994d-e9b1ab2373d7.json and https://artists.proofprofile.net/proofs/artist/70372ec7-d9c3-429d-994d-e9b1ab2373d7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hit Song Tyozetsugikou Collection RED Version ~Piano King and phantom thief~
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 0x5f28019dfb7edb19faa2ac3cbe630376dc96b9ee30162fb173362b8effa21419. 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/JPS801946781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee25114a98696e91785c4634c46f4e409d72b03b2e486582dcd66317defc7dd3. 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/JPS801946782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ce6d6ab68b51d383c7e673382b140931f97f79e043f48821feab084615e701. 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/JPS801946783.
Merry Christmas, Mr. Lawrence (Two Pianos Four Hands)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315849519fd1460175a2e8ed6e1fd7ec00b72b5d55e77f26eb928e144f096018. 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/JPS801946784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139d51cdf73434d57e9de111a91a3e1195057d64c5b6f89c13058621cfdd5357. 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/JPS801946785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4581faf5653368444c4e9d8de6d38980d427f2ba88ca7ecf3a041ab8711723db. 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/JPS801946786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8d4dc1828ae975c8ae904ac22d9f67bc19741ae186c4884869225ec888d47a. 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/JPS801946787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e64eda4d493a42cf51c236864bfb352321d4256fd815b48bcbeb9088acc857. 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/JPS801946788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9d650742b128344580470ba3e05eb60e338bbb93446a7b2fdbe5f6f2582979. 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/JPS801946789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dc2208b61b0a128ac73a9b96627027b6a741af2adf07aacbfe21ae0c3c54ab. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/JPS801946790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf898f400bcebf23551196f95b191de89ae3e64e0b0a07b6a30bdd2056f1304e3. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/JPU902201735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d12a846d9e429fad20fb9d0646ec6bfabb0428202fdaa74154a9df469fd5239. 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/JPB602150947.