SIV or Siv may refer to: Organizations Federal Executive Council (Yugoslavia) or Savezno izvršno veće (SIV) Sydney Intervarsity Choral Festival Sheffield International Venues, a facilities managem
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 0x28baec5984b5e3e719461cca11f7db1a9393dc8793f24cbff5093020587a419b. 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/a27bac04-ca92-43b5-9cbe-9f847b3e5708.json and https://artists.proofprofile.net/proofs/artist/a27bac04-ca92-43b5-9cbe-9f847b3e5708.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 0x99329b0b8ba8383495f4757d848be5299e49c9065a0de6dbf4ca8c386fda9bac. 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/QZNWZ2331896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82028b6ad91bf96f7f950cc449186a593c3aaf117908d2a6a59f4d6d8753a3a2. 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/GXD7G2374093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99329b0b8ba8383495f4757d848be5299e49c9065a0de6dbf4ca8c386fda9bac. 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/QZNWZ2331896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f852d6f00204060b153487c40a5d3b7bd768b23b9b7f97c5230a3e6e79af51. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHNB2490271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f852d6f00204060b153487c40a5d3b7bd768b23b9b7f97c5230a3e6e79af51. 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/QZHNB2490271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3105d9883f42b8840db59ab05cfdda99e8b71717b695f3881867a143609e776c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWQ2204352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85204f54233b36e6d8e010222128099452339422b967b8a5bdda0d76a4a7ed16. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES52271699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245292e5712a9b93d9c3f17c5594ed55190ab962a0e35b3c077f5682a02123f8. 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/QZFZ32269755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eecdbd3257a26519fe2e4dbff89aa094d4d9a8183ff9e2b5def05c6d797eab3. 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/QZK6N2125941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7cc6c53e9bed74f433d31def56b3592ced339fd1fe57d49546d5d8f0eae9a8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDA82168305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d1618b239ce8787de20d703dcb42fc7a94efae6a6a41739d49c91b23e7379c. 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/QZFZ72152654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b05acb4005fd49eb362078ac89bf153797351de405ccf0c572f11fc2122ffa. 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/QZFZ62019744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab55f4d351116807b1bffefe9c0fd03b4916328b6c39c259ffeb4d79345d186. 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/QZFZ62019745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9164c6cc51b6f3d040bad69bb9454ce073cca510dfa5649eec7ab6995418c5ed. 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/QZK6P2026752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6a6cbb8901c73d96f5f2e0cb6287cd921421bdc35513434c2adc5ee704377d. 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/QZDA52370034.