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 0xa1f58fc9348cf0fdefaa91a919f0e223b5cd7084391a519beb9a93cd2886a246. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf945580-111b-470a-9cc5-968a180c036a.json and https://artists.proofprofile.net/proofs/artist/bf945580-111b-470a-9cc5-968a180c036a.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 0xe30e664035e7023ccfa8c05ff7e9ae90c2568a32b33516073527569a35f54ad0. 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/TWP012320201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12692dbd3e047f01b6129048035b2d66698576e9c6e35aa1b2ccacf79efcb534. 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/TWP012320202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ec342bffc9ad02295170ef480f721303836e915a8a627a89c57961ce396701. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TWP012320203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c0e1c33af4771f6bc52906caffe6c28cf1b3b28980eb8758b7e3bd889f31e8. 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/TWP012320204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee1bae44466c7838be751bdc034fb6fc495edffc2da3f664f9e98275afdd053. 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/FR2X42268162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7eef0684bf359d63a5bb1d6b6ad52ada6e3124ec511dc6e860dcd1e48f4de7. 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/DGA092365553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1ed9f99602aa269b1fa14a815a2204c8316ea83aed622c6e43cc673b57e73c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR2X42177656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6831fce4f748f2cb8a12253910c8228c7185198272c016bb5f6fdd970c427f23. 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/DGA092326228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac42445ef703449c3311835125dd641a4e1093839c96a683e7b2104946c36030. 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/FRX762132052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1599d4417069975eedccaf33d8aebc01e645c947c13ed5aec56b8936abd73dc. 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/TWJR12200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12adb03c7182155c8dc2257b8a2ad5bacb5b62f4461a995ccf0680d21a04da58. 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/FR2X42451644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dbb7824d3d7ca6fefe488bd427431eb02d75100cfeb3b05f883efaad10f02b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FRX282411572.
IS IT ALIVE? (Live at Yuchen Cinema Studio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf27f9ed513ede005f93d54df4511f6fcb2dd8fe31f5b9eefa4675d2f362009c. 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/FR96X2598150.