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 0xa9e8e032e7e18faca8b64433c7e173cea8f77d99761f71ed8dd0ddf91d0ee9c2. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e54da544-87e0-4658-a278-77baab8a9aff.json and https://artists.proofprofile.net/proofs/artist/e54da544-87e0-4658-a278-77baab8a9aff.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 0xd7b7b3766965597eb22bf4d4b2722af7a1bf75f89ce81223273a2daeeccb9d2b. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/JPB602159165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a4c8d5b50c2d8adcf0db05fdd8d6a282b4eab5aa04cdfed709c51963dda082. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/JP92N2215402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ad2c2405b4a0ea027c0f1d0e2cb5f2f6122673f6cf2308f8ade37dadb880de. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/JPB602160886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8210c9a8a86b699f20d7737c6c405c7672cb03ba06f53dd60435b9b2365fa8f6. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPB602160887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbeba4f25bd5ad3746818916c783aa2c4d00a0dd9cbb56850205735ae206d125. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPB602160884.
エレクトーン曲集「いつか王子様が」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3426bf2f5f18309298768587c6137a8e1a654b60fbf32033c4a96e537e1be5ed. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPB602159164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b7b3766965597eb22bf4d4b2722af7a1bf75f89ce81223273a2daeeccb9d2b. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/JPB602159165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767ce8ea1a936d38859c923dd9ec47338fd3ba826e716106308df3fda5fe3cdb. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:03:54Z), 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/JP92N2215410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00d2f474d2134e9aabef8e50c05679cedf9532b4ecc4b83319c3d48daad2fd3. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/JPB602160885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d8e23fec601b9fe2d1f445d80ec283ccb1dc4f007a9edfd2cc0ba53f326881. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:59:15Z), 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/JP92N2314847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925170e18536ad03b5e61414c6fe8f4389b032ea6e7308dfd5532e75fe13ebe4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JP92N2314848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7242d46289ccb3a54d87abb8031c46a77a8e4e3635cdc78936bffdd0962cf0ee. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:45:01Z), 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/JPB602160888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4689366717cc8e21e03607f975554745958af4996affe2933f31cc416498cee3. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:05:25Z), 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/JPB602159167.
エレクトーン曲集４「メリー・クリスマス」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebde9d91dbf29ee4e72977bd02d50adf329a80a33ec8a3ab40487ee68b4ed87b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JP92N2516562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dd8bfd3fa38b298da18a40bf71e716700ded0035ee3fe9d054276dcbde9847. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JP92N2516563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bac16b4e212b3748094f995f1a394ccc0a2de153b98e9fd273bda4cd67ffeb2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JP92N2516564.