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 0xa41eda5cd0e4eefb7cc6565cc6110ec93b7f7d95c40467b419921b0fb22f9bd9. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d7b8709-b784-4127-aa95-91e2b7e9df4f.json and https://artists.proofprofile.net/proofs/artist/3d7b8709-b784-4127-aa95-91e2b7e9df4f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
北京中央交響樂團懷舊演奏曲第二輯 (Instrumental)
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 0x005338daa9e0a5d25090ee156b5943d91e0153ca9d744f7f59797d511d53e2e8. 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/HKB529301652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea26bc8f7a538ec3ef4c71c1e375f3402e48e814e659dd51b8cd796e0899963b. 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/HKB529301656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cc4ad9d284533857b6e4f14cb97b6138ccd1b2c0881c51618f2a3a39220ff7. 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/HKB529301658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581a863c0bae7bf022a7ef90b8bd92c81788558b55dccbbac5768310581879a4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/HKB529301650.
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 0x63161b0363960419e4ef64865b6220d5ab86c55e3acff08a63ebca61d5adafa0. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/HKB529301651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fa01e7cfb11caf8aa3d747451282ec894b33434a6ec6322849106ef580d7ac. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/HKB529301653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a988d85a6c6fff099aeedb5548b5f0884ff547ee7ebb73b61f646417078fe1b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HKB529301654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2a7934011efdf964e6cca74bc03237f5f017c930eca8b7da10315df2bc1f99. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKB529301655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f0c6828b0635fae32e401c2d2be9ba64cb294bd89ccdd625f7f3a02c6b4df3. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/HKB529301657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711c14db9fe44b2ab1af3baaae850fea32f2fb7f306ed319689055873c9ffdaa. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/HKB529301659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763f73c6833701436a42407ef4e66524bab15d77c3ec9c3c8d8791994d7eb048. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/HKB529301660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3698ef28b690c125aab0a4642e6c61f5401f02ded6ad883e21c718dead8e664. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/HKB529301661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d1d96e098e34393c581b13213fb2e51203ffcaf1d5da0416cf55d38b26c0a1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKB529201638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8551791adb352e96cc3d8978a49b50cb94a8343c2ecd9391a85afd9d095a0a8. 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/HKB529201639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdc02a821ad1eca90922d93b836ed79285768d026f97f276b7e1be8319d8842. 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/HKB529201643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7576ae5359debd137a0759851e20918bf11350d8683cbe13c9a4e09a4ecec04. 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/HKB529201646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133e1d48b93d15a5e9aafb241ee26cdf3f4b5400b73539f089ca7f2f2fdc1fc3. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/HKB529201641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d797f6f46a61e7a0945e0faf69b15a93117cd39af1a6ddb9396649f0a405603. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKB529201642.