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 0xb28b42e5cf862fcf0686abd9cab9cfe518f2b8c27fa6d6d5e2ecd70553e4cbf8. 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/7a7f7bf9-8758-4ba3-9917-3f21fadede95.json and https://artists.proofprofile.net/proofs/artist/7a7f7bf9-8758-4ba3-9917-3f21fadede95.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 0xfae9e0593e17b71b4f6fc0652a5e55566ff1caa5623a73c64b762f83e9bff731. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/TCAEC1970775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639bc178d51ef801ca648d9378174956c226792fa3072cf176c4c936bc39a6e4. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/TCAEE1912479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828eb306f48de1cb6c81d244ef400236dcd04866ead495c919519589b196634e. 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/TCAEF1934152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226e7b23478a48b11d3503c9243ee796b6acfebb774707afbb31812cd098d12e. 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/IT6KZ1900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031e2ad5a5bd0f324d5448d9b9b7d38010763bf1e46b9bd3c058438df3006f85. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/IT6KZ2000023.
Sei bella come Roma [feat. GionnyScandal (Milano Vrs.)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12b081747a6d4d0420c1b2fada643a7c0c6fa6c6e80c37d3bda6eb8d7e55731. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/IT6KZ2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e052bd7726056cc167ec8e02ff945f7b20e3a94897abd89f09dad7a4371e5bb. 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/IT6KZ2000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84163e98ea69587ff4d80fb528c5cba9ca8761bea01e4701285512dd0005415d. 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/ITTL52130309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0917e26679cd46ebf7d8bd2c7d74786ddabfae4aa48f51e6c6ca4df7539ebd75. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/ITTL52291003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36adebc9b64d5c009de889527d796e1ca8ce37fbde5cdedc138d91d0889fed84. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ITTL52212951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2a806422b72a25aa90c1ceda983eccba9c2c6353134b78a0d2ae258cc10ef6. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZK6H2348682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe13c2ab167bfd8cfda12b3e0fc0ee976aca125f290765661f87333a66b51fe1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFW2455105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb4ae5888c25725f94616b9c146c8619bed4e39a5eee95f337d15f15e0fb610. 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/QT3F22524734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7c47321e136d5bb2249c04cc06c6a4702827ed32dedc2355c827b34ee52075. 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/USA2P2560061.