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 0xdd9f33425ad1d59f3197f60b11258d330df60210243c3cd4324f9c6e0dc3ea99. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8f6f8be-6795-448e-b520-b4f6ae773905.json and https://artists.proofprofile.net/proofs/artist/d8f6f8be-6795-448e-b520-b4f6ae773905.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 0x5b84de98996ba2409d580364457d6bd1dacbe7ced9370dde6ce8ab28509f1893. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GX5MX2595334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801ea0ecf872de52d16f96b82bf03b704accb92a719a383386039c015626137b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:53:29Z), 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/GX5MX2577933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e33f63c734c36bdfa1c2b684fd3547c458e44eccfdd963b8711b338931bb663. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GX5MX2515886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963b20cb1dde715e5dcda88b32c30e72e63822c88801a12cf85292f4dd1440c3. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:01:48Z), 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/GX5MX2529460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b1583d643c4bd72ba463114edc345f7ffa841d5f56c27af8915a72389628d0. 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/GX5MX2547057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6d85d92d11697c8d823b58e50a65d2e9bcb1846dad93d3956fc05ebe016d22. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX5MX2587371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb86e3070e892ed9fbfde2c8451ec1d249646802d586e57380a68cb68f2aa83. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GX5MX2511008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb929544a134c362f07eccbd82ae7ffc424b903139f5cc3089e60e1e41272704f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GX5MX2567002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115a21e0ed3cff8f75854f8838d89b5e0b5fc9a52e7e5adbfe4083d91652ca62. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX5MX2591294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecc1f8cbe1cdb512f5d99f88509ec500d88027bda47a267b9856ec6f090fb6e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GX5MX2558129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d6b93b7c342fcf690aab3487ee7fd15f990ed40d55fae03ee2d6d68ae2760b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:53:32Z), 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/GX5MX2584933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c85c2bf18418393dcd9592588469be304d3edf75c17d81b2ea28373e191d6d7. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/GX5MX2582085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe955c83a1afefa37612d3e22ed717e1a4b6f96537261f02c43ebd0b4b0011b. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GX5MX2532548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7740e54ce2846092b0c81f34fbb07f3159e658b76225d720ee4a26a14bdf34. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX5MX2536844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc0a6060235f9661b65bed74aea6ddc6ee16cbad8f8b67b46652b979a9237a5. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GX5MX2537973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dd327aa80c567c8c87b1dedd8c1375107ebef71fb82fce1c658600ef1b967d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:46:32Z), 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/GX5MX2509182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2db99e9db6c34df88b3265e46d569b5ac94dc75b22d182469a9cd4167532ad5. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:07:42Z), 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/GX5MX2558016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b110de7d77d25ca384bec7cba6e519d318b212ee976041e350d6461d6eaa0f5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GX5MX2595769.