VolTra () is a Hong Kong non-governmental organisation. Registered as a charitable institution in Hong Kong, VolTra promotes international voluntary services in Hong Kong through a network of internat
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 0x43e08ffedacf5802fe7406812316f674360e6f5994416784008ccb5bc218bb6e. 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/8d4ec2d3-3901-4536-86a9-7d6a30951d04.json and https://artists.proofprofile.net/proofs/artist/8d4ec2d3-3901-4536-86a9-7d6a30951d04.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 0x707931bf52b0d3cc35251ab1b016bf63fcb272ed9b47e22e97ccede19c6f0a98. 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/CA5KR2126547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd876ebcc34f00b9e00cf434a20a7fd30ed3ec928fed3f93c38d532ab7cf791. 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/QZS632222021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab21ec695698a2e3de9938593e5774154cd362d6c92d2b96b824a1f1c426df5. 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/QZKDK2167063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bc927c9c0cc11a620f5e01911acdd3da9c6631126116de6324be3f6aaada39. 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/CA5KR2081582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bacca5a51245b2b7e8bb49d99c1a3ff0a23258b28528297370a88f7d7d2dfe0. 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/CA5KR2081583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e3526798c1410d3186e24a00ebfc3ae8b9694cf43142a3d866a7045f3d74e4. 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/CA5KR2081584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f88cdc98683710d5ca7a4a1203c564edae4b10f95261d78540354b03292c7a. 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/CA5KR2081585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d9ce5cf520952fff07153863c41808f7be3b530d2826d70285d2e283bbb90d. 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/CA5KR2076815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0049d8a77b289b52a07bc161eabe1eb61b48daf82dbfd51f4b78990a0066787. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZKDK2094515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc13dd0592f1cac4e04870c7119e4fb6adeae2905ff47eed05381f6d7440f7e0. 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/QM42K1998511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7bacf8e3b68b21187ffe31f2d2c7910cd21f7ebe78251138d6ec2e30a69fec. 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/QM42K1909005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681eb13da43044c650e7ead362f76b9a0fbb37c96b2168c0c007a39d5efbf8d2. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM42K1920194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d10b7b45a6e9199a6cb887bede2382fc00d794193afad27cd04c2aaeefb41dd. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM42K1947486.
Gunning For You (feat. Nevve) [Voltra Remix]
Gunning For You (feat. Nevve) [Remixes, Vol. 2]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9536ba9210675f8062b8166fa9a052ddd5f1bdd3564a00af15d278cb6849d84e. 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/USDM32028204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707931bf52b0d3cc35251ab1b016bf63fcb272ed9b47e22e97ccede19c6f0a98. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CA5KR2126547.