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 0x5b51dbd9f8df61c6989ab754ed9c96958a956a6b264a435098de0a67e64c6ea6. 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/219f7a13-e18f-43f2-af2a-784273b0128d.json and https://artists.proofprofile.net/proofs/artist/219f7a13-e18f-43f2-af2a-784273b0128d.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 0xecd69b7b98a9ae9b77ada932348009495399b8dc22559717a6fafbd805c496d6. 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/HKG732380693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7158a9ec4072a287216956c32bf96387cc91e72fe21cc9e15ea940137151480. 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/HKG731679432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b9e0c97e929834a22264132ddabcc802b2ba2c423b50fc222a71ff4bdb0293. 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/HKG732124324.
像我一樣的人（《百變馬丁怪獸大作戰》電影插曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40354cf8e9bdbfdcdb5dcb22267474fd81197526d16f9a348e104924e357e756. 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/TWDL72307041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e27dff949330b28c9edb8201400d6ff70ca0a2bbfd5f70186341fff8a7f7630. 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/HKG732292141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0a6b34afc54c35a41dc648a4dfb33dbdc7b41087dee57961872fcfacfc8d75. 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/HKG732270284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918f2fa2f85c98bffa337039ac32abe5e0b8ae0bc3cdd657effb8ace95dd0c8d. 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/HKG732269053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08fffda98b099247d1db984f5bf79ccfa14cab7c88877997ab74c7ea0fe8f3d. 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/TWDL72201880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560aad96f313c21c7435cea2aede5a46eaa889b465c3be11012d3e6d025b8a3a. 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/HKG732124368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3887f8ca1fcaa86c43282ff10999b560657fd3babd601f9f5922280fc5475f. 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/HKG731679262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501100bdf97a540ff4ccf2043050e45215ca1910960cf7bde12129b114e15ac1. 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/HKG731679402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e904255ab2631738ddfe9ec70c3fbf3176e3bd813ab1177ec0acdb9c90461d1. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:50:54Z), 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/HKG731679457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51112c5663fe8c0a531743da37b10d6b7003be262f3a5681221a200947b08952. 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/HKG732124340.
归来 (电影《那个不为人知的故事》插曲)
归来 - 电影《那个不为人知的故事》插曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f001c0e17c4364cc233ee461fbf373c6ebecdf7234dfa75c83b1f96d5bfd31. 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/DGA0R2413069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e8bd10701a949c82ae226e250b18c06ab6ef381bf1f85fdd71f68895fd8345. 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/HKG732480451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d6f1e847b7fa33a9f520c65fd029dbe207d3444035136b2a791824eac2e6d7. 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/HKG732381637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf027b1eea114bab329eee8c56080cb9e8f9a1aebc9b3836debbd3df5dc2b5e23. 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/HKG732375554.