OTR or Otr may refer to: Arts and entertainment Off the Record with Michael Landsberg, a sports talk show Old-time radio, a broadcasting era Otierre, an Italian hip hop band Science and technolog
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 0xe5c1e5854b2fd31dd30af7bc3ab9b8ee36628b972e1df662766c0368a63bf04a. 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/f7a7c893-4b4f-4ff3-843c-9e8da7b2a902.json and https://artists.proofprofile.net/proofs/artist/f7a7c893-4b4f-4ff3-843c-9e8da7b2a902.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 0xbbc3518037b4f18116dcd915bbc678decf874a0a3c34c9ebb5ca19e27e4fbdac. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/FR2X41735928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64252fce76e221e74c54ff3ed3fef22d7540efff49116eb71e8888fdad808aab. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/FR59R1703109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15c050d808e811cb42d1553263e94da91a1d2f61c4c21bc26f6dadc7fa141c8. 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/USUG12000178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2d64e6dee9420eda85c9974b58f4fab8454b499b677f5886a92b667982e82b. 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/USUG12000174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f79b45033c9e1f8dda931f1b00d37fde9a584e690b54e3927cf2a6e8543cbd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUG11903410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe175f864581025a62be9f949e02551cd5f1c43a7bd09577fb82bcbed2cb6dbd3. 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/USUG12000175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239518e10fe5fcccaef9f5d486fc6248288592175f3c0518aea5ec291e282194. 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/USUG11901169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73f38a596cd2a0936b9f2c2210bd47cc5adf68413063f9084f58b1a16ab1d82. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUG11904395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37375e187939575da4fb75f1f56ea285ff5e14abf94fc5522475327baa287bef. 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/USUG12000176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d4a38c911a41b6cdf47c029bee6964a2aa21529b2f318023eefe869690410f. 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/USUG11902381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9eddc72cad72882f30ede07a18283e43bb7e702aacf8452f67ebb2222342abf. 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/USUG12000177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15c050d808e811cb42d1553263e94da91a1d2f61c4c21bc26f6dadc7fa141c8. 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/USUG12000178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851a3383ab927f6ba64e83a81a93004a39bbbd04ed414e3fe15729e2281dfb1c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUG12000179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0064fd36c86adb2d37dace5abd3069ab4c6084e607c2c00ae9f25a0d31ac68. 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/USUG12000180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c5827782f3a3f801f9cde89f5564753581451030a47d42eaca39bb674ec5b3. 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/USUG12000256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e4d7b9363f8a6f837c0b689638f0c06d0e45d795e213ac4fb46d6ea9eceea2. 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/USUMV2001477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e6b7c924b800c4b89744ad301e94ad48bb3e12f0416399a622ff52440ad4a4. 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/USUG12002609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa344dc4d30b102bd29bba3bcbf6a921774f7743f17dea41294401d269495774c. 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/USUG12301683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6201f612764ced200fb20a30fdfbf4e8b2100b8ca1e70184f4913a327ae900dd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUG12301691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c079164d8e63e67696f3a5450498818effb5ab6b9ae54db69214c146bc0b3b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBEWA1907630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c079164d8e63e67696f3a5450498818effb5ab6b9ae54db69214c146bc0b3b. 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/GBEWA1907630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffaff2c1f3b77ba023283d0bfdf366f53a6a77bf5c455e1975a5006fa109ede. 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/USQE92000165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054d097e0485d592aacaad7d68f38120ea3f45e3fe35b1af66da2853f3c67159. 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/QM24S1700677.