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 0xefdeb2fa61880af4b3bd664099e7795cb77b1c3516e6d9a3a00cb65af2031be4. Chain 2 (Bitcoin): anchored in block 954025 (2026-06-17T00:32:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/377f0a4f-afff-4273-ac18-3f44e7e5ca96.json and https://artists.proofprofile.net/proofs/artist/377f0a4f-afff-4273-ac18-3f44e7e5ca96.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 0xf6fbaacaa9fcad81cac7a82590c5802e245d61c17586ee46c7b491b00bf154cc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKC630300721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84111683ee818f3418fa000a3b58dcf94cd8bc5995a43c373008e01b6f8d5df. 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/HKC630025104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914a1c3d73d5735d756ac8e13e408cfa6296cd264eee561239f09a731754757b. 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/HKC630400814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b170143f12302c095f6efbe66d595bd6547fd252bff20e70221495679cf8ba5. 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/HKC630025111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471966b61533a3cb99a74844f01c374b8f4fb815559ae4165f54421c80f19526. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/HKC630300618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afc989300c3f7776878a9dee624f4f07dfa0e6c840de2513805f3b53673d38f. 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/HKC630300514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35726ff20989105a28241d409f9f1214cbf90845a9f90d5aa4eff828488f31a. 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/HKC630501354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfa43314b3f3cf7e8259e961fefa897764fe9c1d37a2a0bc35126ff58fa79a7. 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/HKC631204277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49b620915fdb32af67f831e50b70fe6a1b06d845097624577f0609831661011. 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/HKC630100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39808311b7db31ca81a34ba080978d284cd38c2688867d47904765a7066cd6af. 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/HKC630400828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686171a63935b6698c3ff35b0d3dd9e8b6fc2200a75f63bfaa996952fb1063a2. 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/HKC639722713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb79b36061f1e53d76e1664a6c3e419da47f03e4ec836f2e5ea050b996cc4f2. 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/HKC630702235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41481724883622174c74fbbdc4dc99f3dc4d3d21191be5ffd81afda4d9ccfb0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKC631506252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191ef868eafaa6dea5aced6daffddf1ae506deb4e691bec64bff58f620046f87. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/HKC630400808.
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 0x4b29af2235b593082ab238c6de0641348c3c1cc8aca1403c8efb7aaff110e52d. 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/HKC631204814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fb9018a96aa5182937f3bd5b55cf54748d35c19e484d723c44167ce689719b. 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/HKC631204802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57f949a2673b3738837b66890571374675032743044f109e1a26258dcd97004. 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/HKC631204816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf540cec340744e1a6d892fe72283fe049e4a1ca0f176133fe66499424cae92ce. 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/HKC631204804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca79108d74c1734889539059532e42889b4da0630d8a8e5804dc8d0988815888. 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/HKC631204805.
讓我歡喜讓我憂 / 我是一隻小小鳥 / 我終於失去了你
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3888265d200e4fafb2d5e1d71a76ecf74c479156ceaf808f42b547b81b9d21. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKC631204821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eaddd397645f5b004fe66b38c43afba08d0a1b88226e1cf142b65b095638c22. 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/HKC631204810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eeb8d949fb396672d8e61bfa143e25de42cb5413d1436e299afc42d8d47a80f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKC631204812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac042b4b741a846f8158a2436196d541dea5524638f0fa59884aae3632beb287. 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/HKC631204813.
友情組曲：朋友 / 分分鐘需要你 / 天才白痴夢 / Ma Ma I Love You / 相識非偶然 / 情人 / 心仍是冷
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc677ee35d48d6e66a1d0f5a4dc43037405db6ce59635d3205e66fb6414525554. 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/HKC631204868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa728aac5e25026d7cbfb167235f669b67464a8111849dec7449420d02bfb49e5. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/HKC631204801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83b0024c065802e0ff41d4ac1ab667fb3b0e85e4fef9b5d32a0632915b6bbb8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HKC631204815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26772c1d4e1e9e2dc45261fa7e9336d5db2fc91da42a7c5c2f3c013b614344f4. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKC631204809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9202bd2e7740d9b13ae0a07f626b8b70e3898d9f006feba1901ed2d201f4c1. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/HKC631204825.