Ru, ru, or RU may refer to: Russia Russia (ISO 3166-1 alpha-2 country code) Russian language (ISO 639 alpha-2 code) .ru, the Internet country code top-level domain for Russia China Rù (入), the e
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 0x5ab1de87360867607c943a52c5f17e1f94c27b4a333fb7347278bc36c32aff9c. 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/3addd7c8-ab0e-44f2-9d8a-18292df40009.json and https://artists.proofprofile.net/proofs/artist/3addd7c8-ab0e-44f2-9d8a-18292df40009.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 0xd9c0195cc7e456c843b90211f61a0887e44850543f476fcd033825edfa5a02ee. 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/HKC691800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3fe25ed460999cc79bc7be23c4f645d5fb0b2f71f0b43f53dfd02776e2bab4. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/HKC692021002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7f683f362ebcc5b6155eda2ed564a7fb73c804e1fc7df47a9665df4a4c6eec. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/HKC692021003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fdfad240ea7355863829c33facfba166fa6bf880596c1c8bda0b93957ce56a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/HKC692021005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bcd7cb41e5146caee81a11c7bb7af2e685df53e3b38183107dee3146df5ab1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HKC692022012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ceefe71357bb645771f9f547f95d5057d63ca43ad4c2f74847aeb4158d3c4f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:19Z), 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/HKC692023411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cda72f6c1c0560bc74fa5d598e3beb57e7e32ceccd2a5dee0c2c6e5950471d. 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/HKC692400502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530f0510af6f17cf80ed357d28471b76c29e1622b02c92800ea68989746d3d52. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/HKC692400507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8a43c1ae75b9c16447a0dd2ca859ae143b0c671f1f5d60f1e4e1c23c70a27a. 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/HKC692400508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf84e2154aaab02aebf874edf877aeb94463fd8a48c09bf0ca19a2efc76e505. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HKC692400757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa697c28e48c8b989001203bc2fc9f9c19004a2eca2226bbfcd1c7dd7ce48de7. 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/HKC692400755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4714661ce1ce032e3e5e4feead24fa285e31fc5a0c6e29b0d91267191c1a4fcc. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/HKC692400756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6352de2b97c0bfad2b76bf0f08b4db301a9d15872a9f18acfaca5e98bb2ab8e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/HKC692400822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56090b5752be74d852c2ab61f56a842d1944f5eebe2c93e94c8ff9b398471d47. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/HKC692400823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6fb6976182695244dd40cdf2239659280738833988005608de26856fa34a86. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/HKC692400821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc630d1b94e473655a52cfe0157677eeecea15ac5632228ca63f06031d157d2d6. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/HKC692400903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d3d4ad5bd9c19334f7c22c5a74af3ae100552e77854d5888980d7caa8c1fc4. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/HKC692400902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7586b470daaac12264ac5ef0064525528e5daeb697247eb309ea4d0c9699b9b4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/HKC692400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e687930ccb969eedf2e230eef9d7fc70909cecd894ea72fc3033eb914fe60f1. 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/HKC692401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd860a19804342b3ccd17cf976062a0545f0b1ce6f85caa8d1f3b783949c16e01. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:36:48Z), 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/HKC692401001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa9a225951dbfb1b5f7db0fe9b1c4142a680b849c454837254e91ee70b79d2d. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/HKC692401101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe62963fd1830984de7f755e989d609c9248eca73d7722d344a5691df28f5c66. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:32:11Z), 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/HKC692401102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1ce09eb1f80ac843a6a7e7637fa61af65b9730d8af66e750684d67b0c0aee5. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/HKC692401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8535e73ffb709c82dbda339d0b62ed6e9f101e29a276d3d51e3ecd076d5c3b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HKC692401202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347f4cea1a68e2fb6d117c9adc8d3428de58a9c7de0135d622def15cba606dfb. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/HKC692401203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76ed7a238d7f22d5741ba77a644fee1974e1a6b634ec25cdd4f74254b8a089a. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/HKC692500901.