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 0xc8ebc351e7610a5f5539af06d616036374656f52db961e19a24f2e2bf2954243. 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/82259ec8-3801-4e75-8a1a-0da192c57405.json and https://artists.proofprofile.net/proofs/artist/82259ec8-3801-4e75-8a1a-0da192c57405.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 0xa939bdcb5d64646a094b94408108b17d35c05b71a0264cd761596b9f79d8c071. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ22054816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb86c9013016c26094985f433f8024227175ed250a90f4ab712df12d514d6c42. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZK6J2073728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50acaf516388be606426cacdcc08f3947b032fa1b3b53befafb5c8a42e122aa. 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/QZPLR2025707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491730e39e36d695c38e6f95a29053a8478165450817e1ddfd0037312967be98. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZPLR2025708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f2d4ba6928d6e58939bc8b957ad49e48326f7ba29e965c3f0a6980a01ca619. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UK2FD2100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f2d4ba6928d6e58939bc8b957ad49e48326f7ba29e965c3f0a6980a01ca619. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/UK2FD2100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f2d4ba6928d6e58939bc8b957ad49e48326f7ba29e965c3f0a6980a01ca619. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/UK2FD2100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd979ad258bd8b281763372ee56aabfd08e0783ed6841ad0f4aa3f90436ef3ff5. 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/AUMEV2311483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeef86914bc251193c88a68451c67de0de4d1d036ab253e771ef8b13273a0b11. 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/AUMEV2492883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde4a6eb61d626b3f161d27475eedef1a5cc795f35ab25fa0e26b1d361e89d07. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/AUMEV2492929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeef86914bc251193c88a68451c67de0de4d1d036ab253e771ef8b13273a0b11. 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/AUMEV2492883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007ec564db62ee10bcf03e5985b6506797f5bec3f59ad654a08149df51b874e9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/AUMEV2492943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b84bfdccf8d7ba18bdc0c8105e0985783e0837c08c03f43db13844bf4f6f94. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUGBT2402588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde4a6eb61d626b3f161d27475eedef1a5cc795f35ab25fa0e26b1d361e89d07. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/AUMEV2492929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007ec564db62ee10bcf03e5985b6506797f5bec3f59ad654a08149df51b874e9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/AUMEV2492943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b84bfdccf8d7ba18bdc0c8105e0985783e0837c08c03f43db13844bf4f6f94. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUGBT2402588.
Dream of the Wild Rose 野玫瑰之夢 - Piano Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfd75bcb15744beb32f5def64cd0a24e3b196a90a58abb94362341dd764af30. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/AUMEV2538517.
Nocturne No. 2 in E-Flat Major, Op. 9 No. 2 - Ambient
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4573b2e17da2a13a1740b59fb5868914bfb83fa1b1784f19b46d4c58af7ca3. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/AUMEV2533333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6419ba504c9b014fbf16a8ad3de578868b9db8fd711e7253a8b02c6a5b6c4afe. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/AUGBT2485447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1074a62c339d0ad6a4ab84505d8f1ce34ac615562682e0d31e2c0cac7520bca. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/AUGBT2433450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981e90184907d520f37c47c3d19d215da78ff3270680ae401d95bb54ba4d4a61. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/AUGBT2540202.