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 0xeb31cd360bb6b33eeae16a5e3b3a5ef3e28878c8d2743d350d935bab6ffcaafd. 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/de028a79-fb40-471f-bd43-a20ed5d90e18.json and https://artists.proofprofile.net/proofs/artist/de028a79-fb40-471f-bd43-a20ed5d90e18.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 0x934f164719e40d25516f21fa2c6dcbd26a52b8e33299288e373c5f60e4b4befe. 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/GBPWR2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a1856750ecfd741a8c4a9466ee42b918fda097fdf861b0d19da081636cb6c2. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBBHF1310503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea71a4eb67bf84ce97737fd9798cc28406f3f68e331d0dde6fd2a72a35c1f35. 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/GBBHF1310504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78252cbae5a80435f08a0140adcc4a6087971d451b6bd2e73a896d5b79f9bb06. 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/UKXZE2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447930ffd9cd9bc1317e562c3da4f27b5fe6efa2c1ec0bd171a9d924caf4c65c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/UKXZE2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b6c805d541dfc30bf9ec7a24bb4fbf9c5c4f4ed6c78eec668402306f0a8d54. 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/UKXZE2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13958a7855b1fac7542b30dac8036438a1b3d161cff86ffe68dae1061c8f54d. 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/GBPWR1600649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a79341bc4faaa45e60b0c973b036207e845af878d2daa379ff641c6412471b. 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/FR59R2229803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85b35485ca4261f6cd9d754ad40f1baa0ae395e7969a7328490d0c323949a70. 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/GBPWR2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc805d01073ea877766fadb71bbcb74e02a12a62a8a3c4eb3ae112860861c9fce. 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/GBCJY2100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e69012cb4b34bd0ce1a07a15cd4d507c64d40cdf886b12df716c983e69e686. 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/NLM7H1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fef1883e0ef378cc00fa15420f296b88cd48344df49d1c8c59c96cb07003bc. 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/GBRF52300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78252cbae5a80435f08a0140adcc4a6087971d451b6bd2e73a896d5b79f9bb06. 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/UKXZE2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1811d67258801effcbc63fd97f589f48f41e5e270231fb51c0cb4b971047f5f8. 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/GBRF51900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339d6390f02c5ad0f4fb83e3a68c754c03a0540bf55028b2bf44742ad844c7e3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBLV62321639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0f00096bea8ef31059fdcc2bd7360d1194869c47605c8adc9f47f0fd7d4dc4. 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/GBCJY1700135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb7f8dc2a15dddbc49b74841f254938d86b50fb55008d7f8590f2b600b84be0. 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/FR59R2229813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76163894d28c82d02904c9bff25f50bc3903152513fb01129a2222d0a37a6fb4. 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/GBCEQ2100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f6d10698f58ea5b16640e83e0e6485bc3574454deec89e225d4ea6f4748d15. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBQSE1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa19455ab6573b2db1fbf05260cf7a65b778299dc9128690177f0e63e62a462. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GBIGR1700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf72d6d93ca838920e1131d28ea3e9348789091d74865dc3cab07de1fea3713. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/GBPRS1000002.