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 0x194e3a6fb448df33b1a727e540b03a94e8f9e35676be28bdf352fb3bcc5432d0. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff1bd875-7573-4850-aa57-d81cd4afc2c4.json and https://artists.proofprofile.net/proofs/artist/ff1bd875-7573-4850-aa57-d81cd4afc2c4.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 0x9bed2c19ef885f93174d845651bc056486e812de6fe77e7203ea698c4c15cfe3. 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/TWAA72201267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9431a58b4a8b1a5dff3a1f2bff5d573de12d8c9cba59e7a339ffcc21d15316. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWAA72201268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5319262f61f573aa61f01f07caded6568a3b741b92436b1b40e81b0e6270bae4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWAA72201269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a008864e54b84daf15598183567b9ff1d040f4ddcf4c6ab15f73ad7d33f1a0f. 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/TWAA72201270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b369323e1760f1cea4108e4e24d58e48c1c0de2a4e1132767ca8fb4687d04d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWAA72201271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23031c1f3a0687f099ce0e24d95e5deccd6faf4089277e3687ec8851a13bc39b. 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/TWAA72201273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3373042001890fa3802874ffdb4949897203cb3e967a667fe72ea0468584da5. 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/TWAA72201274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f1c436824e70bb35c85bdfa20c03ed17475b01d093340824d52442047e4c53. 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/TWAA72201277.
馬斯奈: 泰伊思冥想曲, 選自歌劇《泰伊思》 (海邊冥想)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39045d8a67d8c4cc8d1742da215d195d589a7c8b6da77e5d64db49453cc8003. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWAA72201279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce924ae11f60e7adbd8729d3a74111bc5691d0292f29c68a94f2e7f8eec4dd6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWAA72201282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d54accc6222c5cdebbf4cd444fcde4e6b915cd69ab45efce0ef42f5304903d7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWAA72201283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5d14b1fb9a96b94eace530f15d0fa04ce924cf39862a138e12dd21a9917c89. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/TWAA72201259.
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 0x7877e671dbeed07d540b554cf9e56c6ff229d6907a0a9317ea6e1d356d15cd37. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TWAA72201260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8750e451e4207248b587f6ce0b48181c6cd6cac2d4fdd4dc3411416c17cfbd8. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/TWAA72201263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc053c0e04a11989e54b8ee19476f51a0160e97b7846d70ae4da29c55911e4bb9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TWAA72201264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61af96b7b534f6d42ec4fe7f68f8fa3c70787d494df90f1ad9864fe1c325d9b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TWAA72201265.
韓德爾: 慢板, 選自歌劇《賽爾斯》 (舒適雨天)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048a20c75ea4c64756f180af5840987600e60d5f349377080ff0366d5e585920. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TWAA72201266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90c568fb7470a6129c547cff205fec3bb247af9b1a69eced1e8cfcc6f84a687. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/TWAA72201280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc088ff69c0683dba9b8c2218e159719160171bd286b9301f91070593cb7704d. 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/TWAA72200300.
鋼琴 睡眠 音樂 睡前放鬆雨聲催眠曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb0eb8fb1264d708d3f68104ccb5e33c1c24636ed94d8504c463e28dae66c8d. 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/TWAA72101553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1329c9f3b3fdbef62a5c3275e91819704c8d5831de7efa03ad9e9c1180981e7. 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/TWAA72101555.