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 0x7a22649d86acc842df3f0ff0bd5acd99aff676655889fa566673c63b6b53df5e. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9113e49c-0875-4dde-aff3-b2921768e038.json and https://artists.proofprofile.net/proofs/artist/9113e49c-0875-4dde-aff3-b2921768e038.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 0x02709eaa0d1b846a03b6157e5727d9210c3f557851318946a0c6707eee567b25. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:38:33Z), 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/GXBAV2527916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d34e0e912f13e436175228a371bcdecf92a5f1c9a8e38619cc4842874e2a85c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:21Z), 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/GXBAV2541153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977f815b50695beb8e2d5c378fb7482c716c14b0d5bfb367c04deb34e96891ba. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GXBAV2527334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe589c72016c492172241819e23d258123a45c3d4cfd75fe1992d1dcb9ccf1a9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GXBAV2554560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5347427a99c139d2133592bc79dc4916288bc870fae9575035bc0f88b6758524. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:52:37Z), 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/GXBAV2565448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e2fbdcaa99c13e0ebb412b5a02c100f96cc70aeb5e052620ad1f2247cc655f. 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/GXBAV2514140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ccc8dbe9af674fb73b6f8694c5f4e49e1617a4276929a533a5bdadff6853c9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GXBAV2592392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6592b21bd49960e1bdcf96b26256f6990dfc268e023cd3bbe82d778689d439d. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GXBAV2590532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfafda8f59f45964aad32ca107bffd380f66393c832877f14c2eb8ce5638682. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GXBAV2543446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c01d03617585f3e236fb2f3d0f9705f294606dc2c1f81c81599c1a0afc75a5. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GXBAV2584254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847c71165350ad4fceb99ed16d750492e63f5a26b9aa9f1ed883db4e4c537d3b. 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/GXBAV2506143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf80c3f86d938ea48efa595d29964bb1ffb74c1eee9d0eeda0f47120a44bf5e. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/GXD7V2583672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45425ad2d33a389e16fbd5273c40711678a8063a1049f7dce9efc2d6567d21c. 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/GXD7V2592947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1552375c79cc66d05f386a1c203f4d2f7a3a28ff48740ef36f15769bf50cb0ad. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GXD7V2506950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3703331e789bc4981d45422b4dc9f63ed1facdf18862c805589e9661c1b4a9. 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/GXD7V2533125.