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 0xeb29b942cf1c7eafc00d41a4ce34c386dd0946700ef758f2491a22a87b7e3c2d. 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/f05d2ea3-fc86-4851-98cd-6de848b62676.json and https://artists.proofprofile.net/proofs/artist/f05d2ea3-fc86-4851-98cd-6de848b62676.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 0xb352db0322459ea3256aef2b04dd1bafa21e9f8e2b9946542fb955dc821a7ba1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZDQH2368687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044bec7521230a5727f8105d2f87a2968b8d6e9a72bd82fe4304c4d15bf62c3c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZDQH2373660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f83134dfc393fc0fea85d0e5ec883fffa6ca9ca31bcb11af57a1191a755212. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZDQH2373670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d837db3f3b6d6deae57e68642d78004d6a63dfbc1876e5c51a4f105b991c959. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/DGA0M2338274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b6741d95f2edc7bcd044a220a139e3980167db3d334fa0bf0c591cf05153cf. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DGA0M2327316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c2946d6d84adb8e98a59a7f64584105881ab1e8c9e052c06bfa32d6ae9e7af. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/DGA0Q2392313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a96b790108beb752c7a24dedbe2b69bdb56967aec55868863083d82c19ed296. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FR2X42481943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97c2ad0bc81fd0d89569c6f04764d53ec2d5c1c3cbcebd67c8fee6c66dee2af. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/FRX282406055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9293ca7b21787cc1d2742ad4f2707409b526d2bccb8e0de191389b0e842efd90. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DGA062468086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cd2ac027326ab38de8c1d9be8add8219cdb4f16ef9eda230f250a5c946f045. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/DGA062468088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187ffa0ba4ceb91582419a08c8811b6762c63896a94a21e5dba9d2af98e17040. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA062468089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb111198d4c24ad2a2e0f9e4b70b4d6ceffc0fd1b7c21b7330f24134ef530c5. 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/DGA062468091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f37f8b70a47985090feab7c15c0180110858b745bdc172acdcbbc4c088ce91e. 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/DGA062468092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a3bc19bb6aaab5ca2efbd182aae41143560913074804c053fc05eb2174a7e0. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DGA062468095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06511478f1fbee9e2e67b4f6aa9ed2e6a11d3db8ff93d4b7eba9445b99637f2c. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/FR2X42530606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27a1d004289210dc6e7b98e4d3951d5954780fcb3a4d3681f37ff1978bfadc2. 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/FR96X2546028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdb8634e98592704ccc8a3c468a75a2f6498e0a23f75eb832231d29bc761d20. 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/FRX202563803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01200091d3fa93ec7e66e265bd8f0214ff795cf1e4885f336eecf3b7b20e55e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/FRX282572457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351e5ecc81c7e42043048f019a8cfe85bb8f5f7f93b82a990495eaaee6ec4848. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FRX872576128.