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 0x3f3ea5ec54e81ddcbb65a735653989b3cdc165a6a2d6e6183e9ee3c1f7bcff97. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/920aa13c-b623-44fb-8684-1246836d9965.json and https://artists.proofprofile.net/proofs/artist/920aa13c-b623-44fb-8684-1246836d9965.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 0x4c2355f7116636a3240c2c4016224f691d356cc27381e1b30ad85361d609a1cc. 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/KJZSS2606087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30691c785b59e3653f28442bc3bfa1357bcb1ecf0f0151aadbe50e5b08bab076. 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/TWCT52539351.
跨不过的距离（我明明还是会突然想起你）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b350359c8d75f5a98fa15b5660d5d7a7eb749b288be8e69553f2bf7405570c. 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/HKD012380466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69f6b92d8863b19c2eff79b63f7eba8a84f58de07def699d1e2d6ae4acbc865. 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/HKD012343761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273f41b52dc93d7af2706e246eaab10d253654f81ba546f6f4061bd278664de7. 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/HKE022234261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f85461ca0dfa1df0d21ebe3779272dce87fcf8e6efe3722550c1709d5a5c336. 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/KJPG27848797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d8f34895505eeed310ca945f4e97c4ef58635c4486f538714895eb2e5144ed. 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/KJO7H9365183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0c4bd44d0d46af6ba13e3e65b735f8c3f6cb421d533cf4391f370680cf82a8. 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/HKG731672678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5c2dcdef0f100061aa0ec748429a2c9cb4e5430841b71a3202f2e3a8ff7ef9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/HKG731681725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b5e11ef909ca760ee5730bb006240f15d7c1d2be5b052359263d30fe4d4dd0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HKG731681726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8b6e9bf3093049c771fb943f73cfcaba96cb6be96c33e9ddbe8db037759c92. 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/DGA092392447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f07759836cbb1b5ecb7400c197ee4678c4b25a36d586caa4b0a6d0f719f660c. 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/DGA0H2359584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c65b6df3a3dab31c363be25c9dc22fa6853c94e2ca1a9fbe3607550ce6f440. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/KJ7IY3537122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e90ae6a42607689b9c928cc430e7815d32dc4f7aafcd285b92d94a9502c7af. 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/HKG732358300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961b929d347fd60c968ae36ee88369c76897fcb35f348317f305c091c468ab55. 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/TWDL72302141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1697587e8ca31016e3e98702d73d2961ff51d6c6204708232f2ab3236eeaa21a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/HKD012395310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889fee95f6f05ef0495312f7a4174a2bbbc5ab681c22546ea59c3ad64d672b48. 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/CNZ781901096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa148fd8c021120e18a33e9a2836cfd3f8c2ce523fee02d5124ba90e642a5f252. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/HKG732112067.