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 0x41c42d77c1d2541ccee8a7a961af8b275cbd2cc27255c212928ada41e9e54fd3. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d43a81d0-67b3-4a32-87b8-e3e74b7f91ca.json and https://artists.proofprofile.net/proofs/artist/d43a81d0-67b3-4a32-87b8-e3e74b7f91ca.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 0xf0e37aa2b9152cf2b3692569844455d844d2717102a1874d559fb28f37c9301e. 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/QMDA72256146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f201cea28c3bb17ba3e76d55a1711066103e9510d2e440699dbd3fd40e5199b. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QMDA72256147.
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 0x6b398fba4dd6ee05be7f757e41fe865d346682fd4513732d31b190058600624e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMDA72256148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3454838d039beab1184d65bc7a70e02e8c8991b863a36fe4b8ed06196dd75464. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QMDA72256149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce2b09a6867f409dbf3a73b62ce34aab6bf16790e4a464cfcf65b3c36d4d244. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMDA72256151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b1180dfe5a14b579b12c60bc13ffdbf65861c34ea60b41805dae3ce2c40980. 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/VNA0M1845673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34929f480d31c432ed148b12fd4102a25e2766739d5dd6334454a2f62985265e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:29:59Z), 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/VNA0M1845674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b98d54ae91be30172c7f4085a31f4d0ce89a18a936202946f4a7da996389df. 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/VNA0M1845686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7b2985f66fe987482b8cae87efb9fa40886a20569e9f2a1816ac88f730fa83. 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/VNA0M1845689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e2c91d41d5c11279a136a2132b0fb9a1afdac96f5c4b6a6794652b1f7bdeaa. 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/VNA0M1845697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5fa76d2504641e2ef23cf551acae8754ef40dab6b4eeecd07a907282817ab1. 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/VNA0M1828393.
Những Ca Khúc Hay Nhất Của Nhật Kim Anh Phần 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe962c53c73403ffb7be0b56ebf4550be42f86a78e947d497e61ca110b34ba8ff. 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/VNR011034124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc42d99c5b3bb76a3d451404286d0212ac7183dd5e17bca2be3642b50cece154. 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/VNR011034126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c42094bf4899f39980f99445444d24d2404d68bab7810c6f48ecbcfadb0a66. 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/VNR011034122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4bd278ac625cddfb80fc5c7c6f14337d38c4b7ea3bcf695a5fe029362fbe05. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/VNR011034123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce19b6fd701b73823e67f10f05b0e6c1e700c00599b5e4fb16e0e101125aa88f. 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/VNR011027788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b48fdb1b84952b3cb0250f351dee64edb5d7b241c88f1fd14d930f13bf0ea2b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/VNR011027789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2d8b6906091f71c487e86747ccec02ded826f9260d470dc9d534ec4c5bac8e. 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/VNR011027792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48505ed11597646f2e589758c8ec141b146832399f45270a71e4f1203d29aa0. 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/VNR011027793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1602a14bbaf00015fead8fb9074da3b42a946746808268bb74a99bd94dc253d4. 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/VNR011027795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036900b7656a56f83efa9d6e1d31cd24a2ca0c458ffc6012338bdcd71b577048. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/VNR011027787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ccef282f2b0fd30892636bae8d7813febd56276e258b1cc318a8adecbbd216. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/VNR011027790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec500af3a76598febb5f8f23053ef4762a784f63b3bfebb8ac50deaab2ad329. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/VNR011027791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa818d305e739c7093b2b68a5c608100e40dfc8e803163f1a7d0f542d34e1da. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/VNR011027794.
Liên Khúc Vọng Kim Lang - Bậu Đi Theo Người
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24740ffad88a6a1747b8eba6622db3208a28dac95fcb03594a3683c61d7750a2. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/VNR011027796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca3302554d8dff5a6679255bd86dca0f05c9abec6e122e3c79f8e8d875c483d. 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/VNA0M1845643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63772fb3167525624025fb4bcc8e542909828ff56790e71173fd81bf8e54892b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/VNA0M1845651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0caf6b54a98872e0c93fb4eec9bb1508c52c17d7284293e550f66a882152ea. 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/VNA0M1845594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164af4a74262939aedf7b3e7372247706d5ab1932a62c98f0ab775ce054ea15d. 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/QM6MZ2487619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049f1a8df30079a1d3fdda25012c8965edb24f8115a09eea905089dabefc771f. 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/QM4TX2445076.