The Sound of Arrows are a Swedish electronic music duo originally from Gävle, and now based in Stockholm. The duo, consisting of Oskar Gullstrand and Stefan Storm, have remixed tracks for artists such
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 0x524d009220b58d5cb675e4fc41d66208fc00675b5430fb9508609de7d17a7c51. 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/2a43aca3-8907-4bbb-aa45-782ee4207e04.json and https://artists.proofprofile.net/proofs/artist/2a43aca3-8907-4bbb-aa45-782ee4207e04.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 0x38da0d837eacce0cbf43b0bf17a830a07faa3aef9382d041907b006895d01b74. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBX5K1100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6e1e7b16f2b81a9281d116bf5fcd4c183c581155889b3f9cc5d94ee8467769. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GBX5K1100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dae038cd516ea8e54eb831050411b19f331411418f749a28d59e837f7fddedc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBX5K1100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f2081d1641479ba3fba8975c7e218c884acefadf2b40845334cd531fdfe8ce. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:27:35Z), 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/GBX5K1100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc41bb6d0d05fc4def2feef94533c31ac9c2b8eea83fa26e372a2f8fae0e52e. 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/GBX5K1100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d999f49e813dfaee094f87c320f9bbece78b11e9350cd0c753a633ab16fc479. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBX5K1100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96016b0f972d7076717ca0908776898c32843f1c5e6d7e83a5674eb7cbf8d7be. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:19:20Z), 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/GBX5K1100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761784845392d1f0f4fed2263dc1776826b42ddcabf031965e5a2d7063868ef4. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/GBX5K1100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6e1e7b16f2b81a9281d116bf5fcd4c183c581155889b3f9cc5d94ee8467769. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBX5K1100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d0294a9f05fd1dd5078ce4f46c2ff075b9268ba301335064ce6c356a8e8c6f. 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/QM6N21707022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97222dcff8f981b32d14f400318f8e25ad0d9cf950c5d60d02fada2425b897e2. 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/QM6N21776805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804da8859445f34f44634b308a585805878ae06d2d662684363d0525f5683d82. 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/GBX5K1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45061f6e12d677069d68ea162c3fd8d8c57dc7a8ee558e7b8e7afe4b86718742. 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/QM6N21776807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dd2666821fad37e8c47a51f0fb987e7071ce9ca2e2119e62c79a3485caa2d3. 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/QM6N21776810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07731e924f9895451d74101e79ce5c444f2e28591c98b83b46e5e83c4f2bb512. 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/QM6N21776811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505416494b7f189c787995cfd8563073bb37886e91c6b0f3deb7634476f64c3c. 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/QM6N21776813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d0294a9f05fd1dd5078ce4f46c2ff075b9268ba301335064ce6c356a8e8c6f. 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/QM6N21707022.
Passive Me, Aggressive You (Remixes & B-Sides)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76eb79d45847b9f7703cd54a834f102ef1896a6dc7b4c1ccad3522cf747b97c. 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/GBUM71102325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1579394e27778ca19e2bdf73733498f9e4b23ba9f431fcdb694fb0eaf671a28. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUM71009889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9af87b1f71ee6ff81b55745414f7d03e2fa362169438d3c51d4a681baedc40. 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/USY8U0910404.