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 0x44a2aea898eec5dac38a730639b21ade59b50fb141691defddd773917e8c135b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f26b2b1a-5681-4341-84a6-08188cb68ba7.json and https://artists.proofprofile.net/proofs/artist/f26b2b1a-5681-4341-84a6-08188cb68ba7.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 0x5d31366e9d810a058ed4045ec236d33df6eb5f0e0bdf468bf8102aafc7334367. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QM6MZ2533796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84cacfac1ea5b94de021378b6660590c70ab2c68e2f3f747f6f510effec4490. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6MZ2543208.
Có Em Là Điều Tuyệt Vời Nhất (HLV Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c568d12285acd5c3bb0099e984b8bba6c6a3de8a3f6118aa0ebf589f9e8eac. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6MZ2538123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf750994b43f07950620412a0373ce2c753563d6c8edba6db88d4558f621f42. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZYHM2414651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3cc5eda4c17548b6fff4d4fd2c55c7ae783be70501f4d637be584235a8bbff. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:42:00Z), 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/QM6MZ2560438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac519743fa526c86b22d4a9895bd265013caac4195602ab431e59bd0cf16546. 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/QZYHM2410883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bdb6f2f6edd1dbb04597d3d4f62383c62376e3f5dfeff06aad06ac6699e949. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:16:02Z), 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/QZYHM2415859.
Cho Em Gần Anh Thêm Chút Nữa (HLV Remix)
Anh Mới Chính Là Người Em Yêu (HLV Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc773b92ceb0aaa014dd7df969941de18f850bfca58c5cb8a5140db20287d6e30. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6MZ2574319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9325576ccf1ee387cb59150bebd60f291b22963c6829a3d4f667bbbd0221d38b. 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/QZYHM2410906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774de91ca3c8866cc379b58943fba74655b910d666efda0f3f05f5fe0c6a7667. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:53:06Z), 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/QZYHM2414650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf225f6d205196857a0194bcfec23ab83d1c167936fbb4d2decab9b68f2b0111b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMBZ92502785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1047c4d97032c3a29106a588d65242f195753040c4ce690d15372a38811a359. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM6MZ2592425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb04392d10ef207b1a297466d2f40c6836255afff095aec9e47d2b09f99f353. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM6MZ2592115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fec1b9a96a91a3c0f5909b5f023252e5de8d1f67a14ed2bd4894892befe8974. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZYHM2414661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d306ff7971b451e230f4ae1e98bfb6b28809777b2608d89d323c2d9b4aa524. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6MZ2533934.