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 0xf88deea9a0bd9b9fdc2e07deab8a91796ce521f810dcc83fed833dd1b3eaf899. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05655e82-651c-4843-a155-302fdc275b4a.json and https://artists.proofprofile.net/proofs/artist/05655e82-651c-4843-a155-302fdc275b4a.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 0xd7151fd1e02439c7860739708d8a59cf1401253e7f793796377cb7913173ccc3. 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/USHM81067271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458fe4b88802903523c21d1f69cc3b45201f946708a7e2841f45f3b273b6d800. 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/USHM81067272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b2b291aa59a210aeaa5b2afc8c14ad109f28bfecb3d757dfb0f73c0e10fd87. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USHM81067273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9094475487b23ed57df70a8f3b662bd3fc8713599700d4b12b1db1614002a5. 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/USHM81067274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2703638c7a7ca7f404c6145d49bbe22bf6c5bf0639bd33f715cf343226f82078. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USHM81067277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35554b599855236d39a7624b7b311b53cb80aa3c21904023223edb52c9eb537. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USHM81067278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca04efcfedbb81fe6428af49b9acb3a059adcd1289ce96a67d8a404db3b4d775. 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/USHM81067279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e75023bf3052f837740d0d77e3f9986227d98ef349ed4c75cdfc33bba336ca. 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/USHM81067280.
Flute and Drum Heard at Sunset 夕阳萧鼓（春江花月夜）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38eb256c4252ef5527dc434f37640c6c202abbd4ea9fc5447773e7bef70703fb. 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/USHM81067281.
-The Moon Rises on the Mountain from the East
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617b4b7ee5faee7ec8e32cc23a64d8d5bc972a554665c4405689afd1c4f07793. 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/USHM81067282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5cb7142cbdc5354ac2b3584e17e3fc3fd9f88420d47efe020731b6a6edc96c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USHM81067283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e493a64f3e80ee26bd5ae8266dac214249011766edbc6dd27a9deaba296a043. 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/USHM81067284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35b7b21bbc7c4247e6463ae400b51f5b62f46f7a2bc90e273b1ae98b8466e57. 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/USHM81067285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7af1908c40b44317baf875f0a65a279d278e052df60e29ecd1b972561a2db3e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHM81067286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e381da215e61b6948ae84626ed631558bf625d367c6e0995335f7321087ac8. 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/USHM81067287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c816bb1322ea10d166d64562a19f6ae6f608b72e79abcf2f4adf47dfd227f9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USHM81067288.
La Bastringue/Green Mountain Petronella 拉巴撕准和碧山舞曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb66488c93135e6dd57bd242e1ebf89b397e180cc5ecd391cb9d50e37ae6127. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USHM81067289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e75dd850e8540b0c3bd6c2681348f25db96c003e4edb4c6e2cf804df73a5517. 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/USHM81067290.