Diyu () is the realm of the dead or "hell" in Chinese mythology. It is loosely based on a combination of the Buddhist concept of Naraka, traditional Chinese beliefs about the afterlife, and a variety
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 0x4856a5288324a0489f9bb5fd362e7c4aef7468986853e31f1b559a9d9d21b245. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7713c709-534a-4ea2-8f1a-fb6a77e2418b.json and https://artists.proofprofile.net/proofs/artist/7713c709-534a-4ea2-8f1a-fb6a77e2418b.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 0x227d171484ff78739ebdbf1c939f4591472c1496fc78be2591704270fcde895d. 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/DEH742431456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2b828c71a1ead9610d271d65c2ca85e72a807db00d2227dcbdb2f06e126dd8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEH742310033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ce18481e9d0159d32b50108c117fe4a8304ebf9f02266e4e41fef5b0ec8214. 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/CA5KR2300647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f0e02c0551a68fa8556209cef6ad0418354e54e9817fdc309ac5d117299058. 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/CA5KR2211730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f88e20223597d8a4df90082791994646c8cb6b4c9d944d6871a418226ce2e6. 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/CA5KR2126990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058957f20fe7fa999f300cd2ae978315943f274a3ab0bf18020ed7d6ade383fe. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/CA5KR2126991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e2129c35dc5e71832949133bc3fab392a6c2e5a311a70803f9216ea533ac73. 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/CA5KR2108836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6e4615b79bf749133f2fe4b11d37c841290f81827f73f73fe7f42bece15b63. 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/CA5KR2023455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac9d85cafa2d932342593f3145fb31bc26e7db8958f44f378d9782a93eaab50. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/CA5KR2241662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa625c77c535a785deaf28c708ff84a6a40ae140e7444a7b91941e2a7939d5e12. 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/CA5KR2241663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbe503b0c3acd08db9c44e1fe4c82cdda9e622a799661349e495565d68912ab. 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/CA5KR2241664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e7b96a4277b3a15e427e7b5d8fe24141fc4d544138c553cac5eb2fb2bbbb54. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/CA5KR2241667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8852254eae36a2dd698de0af14512f7bb7552a458903c67c8bc3f2bc92df43f. 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/CA5KR2241668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c78e1409decbe2839a5146b95c5ceb1b65f14694a117c6fcdb8d919d93f061. 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/CA5KR2241672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdced3d172561255773c264cff894bd81d79408838cb19d68d263e415830eee9. 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/CA5KR2241673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069d5475b41c2dff75c63982a79b616a9ac296979a85b259b7bf6d1f43a00c75. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEH742165027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582a491e4950ec94a72d1d35a485295c6b0de129970ebd6d515810a555505d07. 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/DEH742165028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd6a9c8c41da39a512043a569bf7bee42f6e5f54694c2a92f34913f5eddfe12. 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/DEH742165029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113108cf22124634fe511864ea0d42e1cd804c0944b0a9f14624e2747e576e72. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEH742165030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7208b4c5b6ede6136a491b0ed1f045fecc805925b58fa567164fcf16ac135a97. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEH742165031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa1719bb824a9218a74084d332ea0667f41c4401137eebf4969e9e4dcb86f9f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEH742167729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37371194c142494325750c19d27c51f718c3ce7695123a65187f6c96f86a16b. 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/QZS632357135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c1bc65f4a7f4c873c7e2a9db5dc0fe10cd4e59abecf9cdc7a2edc8c479a280. 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/QZ5FN2178195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe616a74eca5e6b1116e0ac9f2bf84549860a05049d157e45098bde7f0b0e51b8. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZ5FN2178559.