DRS may refer to: Organisations Direct Rail Services, a British freight operating company Schweizer Radio DRS, the German language service of Swiss broadcaster SRG SSR SF DRS, former name of Schwe
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 0x041c55885b27ac2f6eadec43e4b5b4bc20458d31d10046fe748fad2647bce554. 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/9b83a675-d31e-45fa-b496-61bd853621c7.json and https://artists.proofprofile.net/proofs/artist/9b83a675-d31e-45fa-b496-61bd853621c7.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 0x3e43c0c33feb7821f92994e410b474e515c6ea6971212bd844da40fd1eb9a30a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLFL72100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8110cbc47feccdd6a97bc5e485603a41d4b32aafae170f01421a491fc23b5863. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLFL72100166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe215784ec852b4afe264f01999657574cbb1a49df8458ae4d7566b9f8ba6b613. 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/NLJ2H1500231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1844d4fd09bef56c5b009bc8d35fff8008f98dfc4b5a07dc3742acffc99d63b3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLFL72200563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf01bff72deb5f4d508e3a78f338aebcb7b80584d07787fa9a4aee2a9653bd4. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NLS161801691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2894db310fb095ff8913ba7d4fdd746e40549cb478ebf5ddfb75076e790be59f. 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/NLS161600501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6134eb01dcbe3348f70350ae5bc5902098269e38cf1b9ecad97fd60f63c2ec15. 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/NLFL72300371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8b2df07e46b2e41be6f6d6eb5ac2c58974784684f8da0245f11c81c868154b. 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/NLFL72300373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbfa71e23284f512d3092873419a663980a88de455c63b3e6851d2f0565b0ac. 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/FXQ692200318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8767d8783b06447b321f9ace0b78fef227789057d95d19de68c903f6ac1fe00e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLFL72101241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3ecc43ab2b98d914d8cccd9ed3c9474ffe58b2dc4f5ecf6dfa67f739f7dffa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLFL72400425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec630d279367b49a5a63ee37f5e00a6558b711d57d1d7fc50f67b3a3a3baab1. 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/NLFL72400429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8767d8783b06447b321f9ace0b78fef227789057d95d19de68c903f6ac1fe00e. 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/NLFL72101241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823b636870e074b7c992f29b4464ae813fc5ed27ed2dd22cb63471336489a51e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLFL72100383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222b05b518324bcc094bf8e5d5ac29539739a9c123bded3af3e67165e2061ff3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLS161802204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912f344526695433521c58e5973936fb412819eeb474903949a5acdfb61ac613. 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/NLS161802205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8745a276627b1ef63ac819163dadd21d1eb8ee131787be8f8313961d6b9d10c3. 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/NLS161701007.