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 0x841841c644f202cc290e55ab28e7af936985b3df2375acfae4da6b3439941fde. 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/18f68ea5-38c1-4fe8-980f-4fbe12769f06.json and https://artists.proofprofile.net/proofs/artist/18f68ea5-38c1-4fe8-980f-4fbe12769f06.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 0x435681354fcc0f1090235781cff1c8f2fcce2648e2a8339f8a95b8ad20069313. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/TWY031700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049ebb3dc2a71bf38ed42473b160a7790d52b56b8a340c98c74183b5749c0d36. 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/TWY031700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd7a75a09d289ade799369fe3eb9372f5007368d562733b4a6bcb9466bc5031. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:57:29Z), 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/TWY031700009.
單身動物園 (「動物系戀人啊」電視原聲帶)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4895f18a98ac9a484a9e1e83fa6534ce5ea9283d35ad2c2b5f545078f8e48c34. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TWY031800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3c6e1dcaed8917acb5cbdca3a02e08586f901b47e6f251508dd16d26a2d718. 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/TWY031800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3391b25442e18c0eda79fe95cb3fa5797ac1e170f084730a1582339d06496073. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TWY032000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5a5646aaa34bc76c8c5f629ee1be1d1e85ecd8cb18cce485e0ef7d3e796fae. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TWY032000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ebc986c64c9da167f789ea5abc5343d2465e151f590dca5daafa9f4622e26b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA052264343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c588700a45851d2fad1e74cb0bfcde81068179edb357450c6d4db9fc915e09. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:27:01Z), 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/TWY031800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a31b2acd7d9c29940a51b52ec6d86266f0f2fb9b16fa7ce9c1a9a0499f5f1f5. 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/TWJL12200005.