Tarchi is an Italian surname. Notable people with this surname include: Angelo Tarchi (composer) ( 1760–1814), Italian composer Angelo Tarchi (politician) (1897–1974), Italian politician Marco Ta
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 0x47660c4d9ed1ec34eed6b941284b1658d2515ef514f6d24c0a31d329a63b76a6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64c43e54-555c-4249-89b7-622141e5f39d.json and https://artists.proofprofile.net/proofs/artist/64c43e54-555c-4249-89b7-622141e5f39d.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 0xbed583c7d5abbd31f7f456a9f21cc30413084d58ce2ddbd04b5ea458b3d6218d. 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/SE6XW2181878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe805a08b70533c3a744cba4fc54230fab03eee0e3128f6da9a869ad755e027db. 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/ES75E2102180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf237ba88404129cb711692d0f48108d2dbdaeb135131fdc818702888b6e564a. 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/ES75E2203281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bb5f16ab9d4be09ccf29aaa78a41437010a36cac1b0fe47ee8df361776330d. 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/QZK6Q2260185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae32503a5e4804435b4be5e6c3457956651e096e64e50791231420206dd4bbb. 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/QZK6Q2260186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda105f7834577e351bb4b381c134c986ec512af2ad2696d9331a5be16f83578f. 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/QZK6Q2260187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ac081d60a833252311ebe02e7157c9b376101ee1316e3b15c437edf4869d98. 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/QZK6Q2260188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a41ea637037d0a332a9caf36eb03a4b19a5258646c3395f40a6d7d3281a10d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QM4TX2494117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdbb6238e54fd54876f386457db86bdf45683c6b4a265e553651e9403bcc2e2. 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/BK4DA2430675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ff40bf6d441aa654c677dd26329a9b71db7176a790e27fabc8bc23587a8563. 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/QZK6P2248821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d70ce6d4cbe5e3c4d38f301b2b1d9a3cf0b1f296153034694f8a7868a93086. 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/QM7282350433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0864707f72c4bf0cb2b45ea5891a5835a1919684bebb76d346c6df67cb4c49. 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/QM6N22356012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d70ce6d4cbe5e3c4d38f301b2b1d9a3cf0b1f296153034694f8a7868a93086. 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/QM7282350433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac89620a8b4327b0fb1379ee422f5d4cbf369e6d05fdbc3bf0f975302796995. 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/QM4TW2315358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffa4e91dfecb319e3cf88a691a85a3717601d8e11fdba6c475e7f09916a2553. 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/QMDA62277623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6455f36dd93bbdbc361c1f8146fcb4c6d964ff8406e2838d3198cba6f0ad3c. 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/ES75E2302890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4b9febbb509cdcde5ce4acef003a7614d6dfb1c1654b499e205f06729d8524. 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/US7VG2507297.