Manchester is a city in Greater Manchester, England. It had a population of over 589,000 in 2024. It borders the Cheshire Plain to the south, the Pennines to the north and east, and the city of Salfor
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 0xc63a6ff806723b463c92c4fecd1b1d6299900c87fc0db8d20e76e69cd9268d41. 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/3e48c457-2e2b-4100-9164-fd8e17c51115.json and https://artists.proofprofile.net/proofs/artist/3e48c457-2e2b-4100-9164-fd8e17c51115.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 0x119e13967f742f487f0b1162f74e7804249bd57e7a9da979d1b1c4a633450228. 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/PLA551100296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d9832a570c9b1478851620d9eb2208e494ab68ada94558a51e7b0abf2c7285. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/PLA551100294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c7a69930ac7c7824d04216b1eefa59998b515f3a85eda25e62e14417fdffbe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLA551100295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1768d796ae00b502fcf5cbec350f28368c76b097c331a33bcc2c155310be36df. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/PLA551100304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848b855d36099a5c789185007c7ed0f64f03501435543cd86425d046ad920a2b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PLA551100303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd821882d192d47899e51dd00bb4217cd763a9e19d3fb6c19de56d87affe39532. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/PLA551100297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4c3ef3bb3aa448b4900e2c25251fb50bf2a26b6b7c6547bf94026937b08862. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLT991700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4162eb540fc94c307c4ad52b0c4e7940243793decfe92535c36f000d39ccf0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/PLT991700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466c15f67557c05b583c11af9fe8581ad264a3098a3f5cfaaefdc27df2a0d15f. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/PLT991700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10c2e41d419c6f3fdce98b9b2d681ed7a1f4ce232dbfada8c9c61d64739f517. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLT991700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815b7e38a5965849e34c604b08aa204d5c64a5fe09d57cd31e6955d8676000cc. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEXN82438433.