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 0xd42921905e254b93250cfea73fb7b88452eb916e9cb7b91f5f1fd1475e355311. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c0cbcdc-03b7-4567-a7f9-7ff8445b0350.json and https://artists.proofprofile.net/proofs/artist/8c0cbcdc-03b7-4567-a7f9-7ff8445b0350.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 0x046aeb15e3aa36bfc32df8f576f67d3c8fc94d5735527a5336ddde6230e18376. 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/CNZ882400149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef1595647a118e93463eba0d2e8d6f25973b5717618c59cc1835d5afb8feb09. 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/CNZ882400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054b6ccc2f11206bb52b2f476399e2ba3ab5232fa8d7c5ebdac18fbde24a4793. 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/CNZ882400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d7f783e24c0ddef305f794ac1f14234784ca45f1ba8a676317a31b9d79784d. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/CNZ882400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5515edaa553f2ad1d0140e3a536ee0f2850568e8b4eff9c8e8a733a256bd18. 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/CNZ512000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e43cdfe26e4e11a17b4eaa70a4431f221c1b80f3221887776fd216892443d2. 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/CNZ511900881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed21d080b89f68ad465dc9f4c514c7b10ec72f77a2847101fa5251195af1e9eb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ511900717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688f3a4053d6aabf4fcf9f839f21a8dbf9a876573e8e885939bdba4a32e03dff. 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/CNZ512000541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3a369db380092f5b5951756dc992708d4ec94b32fa7bba52c8a156282c3168. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:33:16Z), 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/CNZ512000537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfec6ab4cab590c7a93e38f74a38e3572819be048d5386e99705f5b2c9c837e3. 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/CNZ512000538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b6c399b349448b94e1383f1a44ce662f48cec230cc49e12e701e6eca784e8a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:51:07Z), 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/CNZ512000539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a84ae7bf631084648f3523703fcf7c2bf40509eb3407ea6fff0c96765836c6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CNZ512300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5515edaa553f2ad1d0140e3a536ee0f2850568e8b4eff9c8e8a733a256bd18. 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/CNZ512000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e43cdfe26e4e11a17b4eaa70a4431f221c1b80f3221887776fd216892443d2. 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/CNZ511900881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed21d080b89f68ad465dc9f4c514c7b10ec72f77a2847101fa5251195af1e9eb. 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/CNZ511900717.
街声大登陆合辑Vol.1：这个世界让你紧张害怕吗？
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c6acaa940b93865f775c839de49da2b0e8a254dd0aafb17f13b409ee356b35. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWAE31801559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948647062c77411fbc43a6691dde60680ebb14cdad564e903d5a4bd024e0e437. 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/TWAE31801560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc285a450ceaf3b49c2d35996447d19825f3eb856462f9120177999d8022892b9. 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/TWAE31801561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844e6e3f3d782a4765fddf4ad4cad90fc6fe62926fa26172ba5234ec80b250e4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWAE31801565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbc0cf7d20ef9e2b55a0efb4cba06fd4bc2e997eb821e22e6bab72eac5c48f7. 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/TWAE31801566.