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 0xb6e6b523411326b9fbde7d8da2715a9a97b8c50e81e3fee615c96959d9ae0695. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af44a453-7274-4851-ab56-984062c858ca.json and https://artists.proofprofile.net/proofs/artist/af44a453-7274-4851-ab56-984062c858ca.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 0xad7a9ffa278371fffef6a91169e77132263788e24a61b103438046b70f2a2754. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:25:19Z), 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/TWA458613406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12cc704d270d8a6a82d107e1820857aef546f8bd0fd9e6e1d58ceea1251d019. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TWA458613407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7685d289dd386ad28b8474522990ea510523cd7e73e0fb5c120ced0046cac174. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:43:13Z), 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/TWA458714101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd222b2c91992f3afa48aa263dee1f5b57965df258cbb6040f38bc496f8f7d97. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:07:02Z), 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/TWA458818109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b21d5f98597d5e85bc46b3982c2ae0f6d975017a0081ce0a93e64eb8f1f028. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:26:46Z), 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/TWC179200901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca7bf1ae390779b56c4231e539fae543d7398d979ba47459571a3e97274c4df. 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/TWA458714106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f6730b82237ddd7ca542ef8076ec3512cec8ce0d3c248ad19c6caa36b0578f. 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/TWA458714107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeba092f75e4e21219f508a4c65c70f5352cddc79615782f7a20a2e7a375be4d. 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/TWA458714112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335c33c0a48882aa86390bc897e89da6a38c19ee628c6a6b32288592ee64827b. 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/TWK450900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37afd996a4042f89517b977146c82b434282eec776c6e075faf2376c9e06a664. 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/TWK451000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bfbc7ea78c171de7ba9d753e66645c6a27c915c717355ee84461788e7734aa. 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/TWK451800001.
虎姑婆和他的朋友-EP09 有時天晴有時雨
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda9c64e161f61865e3aab32210cb069d9fc0a7b0ffa79eedbcc887fac74a4b1. 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/TWQ931900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb9ed2cc5c7c8869d25b483fd47643a949df2de43acb1e7d72f833888b2f546. 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/TWK231508810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1429973b92125409f70bd2898d86f362643ab326d7c92d5658f36a00ffa2e863. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TWA459613601.