Bar Italia is an Italian café located on Frith Street in the Soho district of London. Location and notable events thumb|140px|left|Blue plaque marking Baird's first demonstration of television at 22
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 0x0e60846cd219e46a9d872f41e48bf9eac7e1f2b4b226e7650a2969874239ff04. 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/699b00d4-d049-439c-bccf-f7d1ec577047.json and https://artists.proofprofile.net/proofs/artist/699b00d4-d049-439c-bccf-f7d1ec577047.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 0x78a8699e341e5f30c62e45d311c66ad4903876e9f90e5a9523c5783d493e6d6a. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/USYBL2001656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a7141e3c5b8e961376ace53813f5a00f0d499df73f5931dfc0e705d2e09ff3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USYBL2001667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c53b5c7700ad32e4eb829c84952136c72c3ed85c878ad1c8fed395930e974e. 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/USYBL2001993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f42cb9931c6ae8d198354425feb3b841c79a7ec2066b1dbcf500ecad5fc91d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USYBL2100791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f55ac9a0866173c17ee48356849a86bb75aa0aa1229f00f80f7a26c8d4416f. 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/USYBL2100838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16a49c97253e281c6795d4808608db1c15961bc2acb31768cf22b99aa2e6284. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USYBL2100845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003e6a1eac5f5c37da195d08dc1fb06a6d1e8dd718ccd03a7c3606e468fce36a. 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/USYBL2100853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1c92cc85df11313ab730c0cdcbf1a0bc2a97ede95f2e3855fbc900249767f9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USYBL2100863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0df137b3b630e9c678b135e096c82c26cb6295be43684d294a63ceb8a91d0c5. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:21:57Z), 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/USYBL2100879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0430fe31683924e379c40960b5ebdc09f6f7ad6390b179519e730a5229cefbe. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USYBL2100889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b622b4e36bf71ec03fd77ce3850586577f977f0ea11d72b430f363c7978439c. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:01:58Z), 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/USMTD2300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5c8c991ced6efa219038abedbd33fe1d9061c05f2892d575f29abbaad690b2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USMTD2300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3bc6a5447595f24b086c3592580359a765daffcbc55fa0dbf938f52e97f8e8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:15Z), 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/USMTD2300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1d0a1a16f826b729bc39c5657e854385b75120355b8c7c0d798fdb8ed21c7d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:01:52Z), 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/USMTD2300267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422c3190f3b9e936646b7f10a8b698cba6395b5fd57b9b74f8ec3b91b020ce20. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USMTD2300278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4668ae30f1588a4c8e443ba48698ff85a61b517df8255f6b921863be891453. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USMTD2300270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6aea66edc6f751b1d30c7b7708e11ff47e8c6a33f58ef016957b6cc920c7f0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USMTD2300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a8c674f9fa56ae97cbd16ac4b7244125dbffe44ecf4d890422ef3056b2b791. 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/USMDV2500265.