Surround may refer to: Surround sound, a type of multichannel audio Surround (album), by Jon Bauer, 2007 Surround (video game), an Atari 2600 video game cartridge Surround (horse), Australian raceho
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 0x84f7a1907d69f9dc5f778062c9ac4550c48732b07a658ec08e267c938ba2b29e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ede8567d-0b52-422b-91a6-9792bd67cf59.json and https://artists.proofprofile.net/proofs/artist/ede8567d-0b52-422b-91a6-9792bd67cf59.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 0x83f12d40e3e327ed0a8b4d7674fd7e4996e4cc52a51f28e1bd2220834637cd05. 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/QZHN62426426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54789b18c09c0d7cf4cb3e85b205ca2c072adcc3332d29a8985dbc2251319a33. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6N2432289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797e4bbef66998981fbccf35db722f1a39355f9a9e6a8691f474e377a9dc9bc3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6M2477846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd05892141115ae5f8cdaef58c05419ac42f300baf34cd83dc92107c38c69f2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEN2438836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672b50a5b3b228ef430e89a31a72dbacf037ee3f83334ed5b6ca903656b1cbfa. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWQ2410944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88db8241c62a04ff6403b731cd02b5e1ee7ebfca0d10c39e6881a3b07db2620. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZTAX2487333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466a34105dfb4704e4af420a19b8e066ce73796fdd37c07f4718db40c53c27b7. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTB22418775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61190824e8cf3a5daaf3023f38b0f614d58bf73896432fdf918cfe9cd269b4cc. 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/QZTB62485026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa21cbaab0a6cbd723f8aa2bdc9c554ffdc44cfc9401307ed27b466579ebc83. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:51Z), 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/QZTBE2414390.