Sandrini is an Italian surname. Notable people with the surname include: Domenico Sandrini (1883–1973), Italian skier and ski jumper Luis Sandrini (1905–1980), Argentine film actor and producer Ma
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 0x010176dd0c97c665f6ee89334f8377d26217e8f6ba3a124a8b6975dac2000552. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2cbeebd-67a8-4aa0-8cd2-a48b3a7b1688.json and https://artists.proofprofile.net/proofs/artist/f2cbeebd-67a8-4aa0-8cd2-a48b3a7b1688.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 0xfab0e6e14aeaa4621afc16435e16e84bcbfe647faf3baaaf8c2578c5b9349630. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PT6IB2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b634ccedd8b4a57a4cc61d790197f7e0cc379fdf517c1c301330c84a4f886f6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PT6IB2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591945a1432120e9dae37df39bd5a20a8e5e1982dcb993544c2a6e1d64a54f21. 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/PT6IB2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647834e8333c0ae5f8fa2a60656aa55a3167d35397cf3e70720dd02df26b0700. 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/PT6IB2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab0e6e14aeaa4621afc16435e16e84bcbfe647faf3baaaf8c2578c5b9349630. 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/PT6IB2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd3ab7ab209356d3b742b9f100c7126bad1e380dd453901f41747972e9b26ed. 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/PT6IB2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1587e2ed379ba586eec0abe9b27e280e47d4c70ed576451d2f3668a2332bed. 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/PT6IB2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83e5144164a8a0d4f2393ca571aa09980deda133a7886efe797dbef514338e6. 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/PT6IB2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0dc22833517076325d8bfdaec318fc5f90a0b891b61007830ef40cf056183e. 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/PT6IB2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ea1267128a26fd99b661f6c3b9ab072c221a1f14a1e1b47f143618aadce40a. 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/PT6IB2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f247e8c5906881363875364f08ffe4338e92b56ad04f1c9cc2890ea8538eaaf. 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/ES71G2033434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed9c7b96a3d5f6f12be0f979d35f76cf92f7b4198add666696be63448b18c90. 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/ES71G2018135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf95f6be057a6d06fdcb8d04b3b0f0ea8d9045f9ec130050406d84c84439a75. 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/ES71G2008994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71632a486ec6dc91a6a17ebde786d841ef42a65d925b4070fe581dc5e6b73da7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G2002705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdbd1b16711c08170efeed1d3b4a1d9b2f35f3502a0dd3670421ee802546549. 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/ES71G1947503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3350fb670618b9833454464720b83cbdee105f533b2bed48ebe21206b807d39f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PT2DY2300386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8734b8f43563d68e9dde5fea3814f8950f2a517eb35e5d0781556a9d045b97d1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2050442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8654e47a430be5d89da31c20bc519649152b44005f010ba83a872c7a897d54b. 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/ES71G2500834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cd9ef0f3f15c6a211d4b40f2d6649cff51525d33702767e560dda4fa6bef81. 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/ES71G2433267.