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 0x3bcb16ad20f0c27e021a213f33764aea9b64398d6f6d2a7a29e0559edb7eabc8. 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/2a9549b6-e429-48cb-afab-6851857f22a3.json and https://artists.proofprofile.net/proofs/artist/2a9549b6-e429-48cb-afab-6851857f22a3.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 0xca59b4dbde0eadafce8e7898004168f181897ee1cc2ef029cf82ef3b8363cfdd. 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/FRX202489081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1420b9a1de477e8d15747a2ba8da8cf1b29f42715362b12bb480d72cca7529a1. 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/FRX202489082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282036bbb838a4614ca5ecb498fbb72ec022bd7cee3b365fb0acda0380e6d6b2. 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/FRX202489083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456a6c1169d9e891ff5c329eb13371b92c6afc73b97154b83ee67b3e87ef2868. 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/FRX202489084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc959f44a224d81b61b0ab48ab5c13bd91626f8804a0db09e84ff77967ecf9e52. 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/FRX202489085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5709c7d39c691e3ff1ddd744cf9674ce170e036ed9395fcb64d2a185748c5b77. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/FRX202489086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f8fa05000da90697a0acebad73f6457b7e4637546ea45fd1e43682eed2360b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX202489087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4009a7250e58f18b4462eac9b9e9b8c0f5324b364b46c5a0d2728a9df584de08. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRX202489088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166c9eed93966913665b17320ea19bc10f6e58968f59b0f74e1b508fc95ff56d. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/FRX202489089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e16dc84c9ece54a6a9fc3e45a4d3d4b61337f70ae3e7670ee0a646860415e0d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWJK12200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97e14ce1a3e1f350b5e810f990c6c0f855059ce69633721c078b15a649f7610. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWJK12200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabade8f95c69f666177d5437ba134ba22b606d073852b91af35788e6a31e0cd6. 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/TWJK12200273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4224de1cf9136f304f90c63b60b454ded64553aa26697deb78f8d2567d276a. 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/TWJK12200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49541bcb09fb4fa95f90e154687de24e173fb6867e98fdd713dbe70e2d4b8cb5. 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/TWAE32401933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4533f0eeb63a122e91a7da838d44611c1fa0bcd9d0b030709b4e395ca1d5842c. 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/TWJK12200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5330c1fa2210e53dbf89f1e3589f88ceeaceb49ed2745c7ad5a60f8413dcd726. 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/DGA0Q2385566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1c1baad3a868de9cd34254c223b5652bb60eb686798d831b68fe96b0023f11. 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/DGA0Q2385568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e371bfe443d46e1fb4478f00ccee0b77d881e57f561274bb6840acb2a5e0c3. 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/DGA0Q2385569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320ce2c3cc8abee96e3675ddbfd1640053a2a46c7ded433a70a20b3687c26e0b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0Q2385572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6732a95d0586c1aebacb05d750484edcc96220424fc87c8cd0999102bb51af. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0Q2385574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb72c014ae6f1b6f61de90a8b68325f077a3fa19fa3f8ce9d51f243dd34cd95. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TWD952391106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9fbf3288655e288d0c13acf097e82d17e173134e705af7b3b906cbb63ad53e. 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/TWAE32401424.
大嘻哈時代2: JUDGE 評審主題賽_街區故事 / 愛與恨 / 錢與名利
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664dc4da9d5537bfb68fede9dae2ecab2adddfe1e4916ae95f8e8c84ebb9b188. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWJK12200223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075413590296e3081c9417c36a1a174474ddd3f80f7d8cb144d84e711df246aa. 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/TWAE32401014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95aad8d02d1d6f9541a506a4664d066a8b328f8ccde0b8437eac0b407848f99. 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/TWJK12200251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686bc17f0e71a8a0f0c4a2098e446e8793496c71b9aee6bf96d2a4cb16fe268b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWJK12200261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19149f21c0b2094a8069e4adc0cab299a82fc78c485868ad3611982a5aa70485. 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/TWA472473045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8bf8b1623ed37c38760af9b13fb85d8ae23d34b0ef540ffab30535eaee6e79. 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/TWCC32301280.