Xi'an is the capital of the Chinese province of Shaanxi. A sub-provincial city on the Guanzhong plain, the city is the third-most populous city in Western China after Chongqing and Chengdu, as well as
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 0xdd90afd50b513d6b21a04279f9abe9c453cba23d1b2a5ee55a51f2b9003d2b15. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3960965-3245-4f47-8835-ee76f225c3d0.json and https://artists.proofprofile.net/proofs/artist/c3960965-3245-4f47-8835-ee76f225c3d0.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 0xefb82a75004901e22ba0fcbc039a7af52bac4acc8effe23f75ed9a99cee433c6. 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/JPS801837895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf215535ade65ccc4cdf1f7fcc93a8d97e59de6edc13b5bdcf74bf42ba6db29. 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/JPS801837896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2494e1d06f6e481e0b17c73d2bf85a0a41c36d3dc993a2c89c5b6ef6936f4d8. 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/JPS801837897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9c609acac9ec9f747bf89b795e747c4a351b9a4d852d61da3df709ff2740d6. 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/JPS801837901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d259bd399250334978dd321d2cf8369aece22ee34a6c714f14b1922731c481. 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/JPS801837906.
IMMORTAL HARDCORE!!!! VOL.5 -Voice Of Terror-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22658e40a4ccff7b19998f1b133cc503d0309fd723e1778f89998e109b4bcc47. 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/JPS801850019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dbb3f3022bf3bc7e8f047993f0c0f409c9e4f2f3a34c25d2c5caebbe80a167. 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/JPS801850024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86d1b0343d5318d7a06df4c0e9c1dac1b83f10c9f86bbe90f57aedc155ed0fa. 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/JPS801850032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cb60ba5f1409cf41474860f72720f157d7ec673cf0308ee948515efbceb67a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/JPS801850021.
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 0x9c76015bf62a1a186fcf1cdbc7dfbbe0c14bf9b5882fcbe8c68649870a601363. 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/JPS801942445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d71b1fc0c8fc2bf8e010080f0109ebeb06c32f4c6c1d745a2a7fa8abd4e872d. 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/JPS801942452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeb61656f1b87bf486ddafe1cf36d4619e0a8bb15914fda55ed330e3de00a2f. 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/JPS801942453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045ce729744e65b6ea400b45e44f60f0e1b491e90560fa7ff7167c9474f89d6f. 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/JPS801942441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471fabc15dfa7c0d054607a40af41d946814c2dfc547479a16033a461ce08cb1. 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/JPS801852532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3555f468904406f9fba8827227d931d9f557f46554e2aa29bf383ca1c46d9fb6. 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/JPS801852533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358037c986b248267b34368ab4082ea54c2001bad0a7863ae6f079b76d7e2045. 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/JPS801852536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e02188b15a8339512732cd189dda7f428b3c5180d56fd07bcfdd74355214890. 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/JPS801852538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8661ffce1d9ceba1759f631cc16ee4616e69afb2062cacf614e2067e405bdf5d. 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/JPS801852540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8503cf134fb5cc2dc8d2f7c1d63a5fc9560b1e355f9530e232acb0f29200b0b3. 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/JPS801852542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cf1f2f2992d7fea68a7de17ba9e5d21d010d2e2599143ffc0400fafe8d434a. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/JPS801852541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfda68c2bc59f30e85e58a5f0a04a9e8c17912dc8fcfe7ce1d15ae1c1afedd8. 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/JPS801946231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5a4ca1cc77d01eb8abf1c23b59a644f53d2fd22cf5c70a840b92f39c177f9a. 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/JPS801946235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72d99fc70e0e143b43f022daf0825864d415ff51ea7894762b365ff6ecedcc6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPS801946238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384e4eb9f6a7d268f1a6ff41a3c733bc979399a2febc81f19d963ac7651daaa3. 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/JPS801951954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079d3a0eab37a2b50ad3741159c16bfda40c9604365e681e083089c281f8855c. 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/JPS801951957.