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 0x8927214662d55366422350d35a933cde8c2bfaed5c910c28e96f39a703936349. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a84abb22-599a-4825-8938-ba3801e472f4.json and https://artists.proofprofile.net/proofs/artist/a84abb22-599a-4825-8938-ba3801e472f4.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 0x69dfd48d0f5708d9516501e9c123606ca6898442514001381865d025c6d61966. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBMEZ1546039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7ce2a11a545602b3352da26695edccc90ac110e9c25ee7761df8e8bc415e26. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMEZ1546040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4d3027252ca684bb0dbf7041201d767dc4671d4745d612bd692a2689dbd937. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBMEZ1546041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799acf0095530cd3d67800251eea657fbead492cb8fa9489f49490bd725f1977. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBMEZ1546042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3012fbfd16e04de763f9ab96955d06e4cd36ed6b531736255b705d21f0cfb000. 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/GBMEZ1546043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b26d59bd6ecfd1f341e39f6718eefa08a48ccb3340e1f209646fc4700faf9f. 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/GBMEZ1546044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20ac76e544b72253ac9e60e4c97dc08527a8440fbd7d86486fef0f1fb197da1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMEZ1546045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85464e334e45ae52670a2842d53fa71bdd665358696cb5e6a708a07d43650257. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBMEZ1546046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f9b833816825d5e11a685ea7efc9ec8bc25fe01daacd7ab642119b2f250a99. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBMEZ1546047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8a934cdfdd117354cc0266ad9b4596cb48bbfdf1dd7c4530f7cccbbe7fe775. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/GBMEZ1546048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaffd68a0f5027345edd526ba3661c095c6130fe43b1b43dff01060fa74e110. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBMEZ1546049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdecdd2a472854ef2bff06080e903f63ca0401b8cabffe0803f48c430a3b996e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBMEZ1546050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6871c0d8c7527ea0ee451ccfec7b18bd7e29a49b2b3883494dc5d5d1dfd0c99. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMEZ1546051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7211b34f694f8e5f4dab80c235105c729a547631e0fe02c084206a48c4a91aa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMEZ1546052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500fe21af1b85af8cacfcc427345f1690d8f44d23ac666dc0b8c90fe012192c4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMEZ1546053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd45a66f71462be7a8a54a4647b0f6ac990cd4cb6dd84a87e8a48f31efe971c6. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBMEZ1546054.