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 0x275e3e33b63f19d4c6664fbf59387bd2f6ff20c8eadbcf024708edd045c9c938. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/584e2986-3afe-478e-8129-e1ec351cb81e.json and https://artists.proofprofile.net/proofs/artist/584e2986-3afe-478e-8129-e1ec351cb81e.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 0x4f971d0e5cf0669cba66b7a70c755b4428372662949f60cc035e00497e81ffa4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7R2434001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264764d0d47697dd87b6e5cdea175eb46d5f07b3819dc8625048cc665177b778. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZZ7R2434006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcc8a45a89c6622ef4abc24c5ab9fb49f25bf28c91a026c972f2ae3d014463e. 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/QZZ7U2414641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a9f970803acc1f886eddaec50ee6c7198f5086d9c3c50f110fd4f6733c9732. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES62543825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565d28872409c2cb4cc8754e34e0631bcfba3c9de3d1a383fd41486d747fc681. 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/QZES62524223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38af241d36a59db931f6e7366a884b691f431dbb7b0e113998909facc308ede4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6G2522585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a95163d389e5ffe652052c4baee79946fc59207bd3ebbb9c185f815c38f1ef. 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/QZK6G2522586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e3c1bb03d138febd2f87bc0df8657b332be5c65ec2213a0c082384176d57ac. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:44:10Z), 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/QZK6G2522587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8030f85b47ea85bae7d36bddbb317ae94960003a66e3245ac42a496e320270bd. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZK6G2522589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e82d1f1d712066f258d4b7b9a9fc81c2a61a0b119f823c7d3e9633d73a8768c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6G2522590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfc36057b1cca7b4c59190d902d5dbfffffb5fef26850f8a76deaa92bb56eae. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZK6G2522591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fa68012f57697bd28f1443b784b872764a2d0952904d97bbc4ad1536a1b6ce. 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/QZNWQ2507624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cf43f1d19b20a8b58f6348e6a443b1f437166b5d9b1f4d40005933a57569b6. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:57:54Z), 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/QZNWQ2507625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdac0b2d5f7f424f5b64582b0d0fc1440fba5b2517bceef261a01ae8e6d56a0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWZ2520423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d298050edd411772e83ee318914b9d5575a8d24033958b6f35111d4eb0ac9f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWZ2520424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0f31f4236269dda0a8eb5357e01282835a65d9e491a4504fed1ae7a743fc5f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWZ2520425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf39143e64aad61c073862f35eda9985582dde0fdbdb933eb03d9fa19b322615. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:29Z), 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/QZNWZ2520426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06160e31f2622c03e1539abfc32eeb7e55e39ac9a19df8a2cac3277f729b14b3. 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/QZNWZ2520427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77667620b149d65b649b6de508c20b477d0dfbbff6d277f2fecfab54a28a3cf. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:41:21Z), 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/QZNWZ2520430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5bd2e3cd41c97866381bfbfc10f8d755e8fa91e3e7ad49a5c73271a730412a. 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/QZTBD2570302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05b447eae58bc36e33ccc82cc32285a518452ad8e6c5e425c979f3a4a8e3ed4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBD2570303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dbeebaca81c556d2a22711c0453e8cc410884de5a5b22ccd4619ac888b1d26. 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/QZTBD2570304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b8d8a07014f16bb48c3ebc4bfd71f84cff4ac44122019c50b747be262e51d6. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZWFH2525989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006cdc23119ae0acc4bb7afad0431db2b5a554379de9d7ba0f1f58722e6ee5ad. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:58:20Z), 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/QZZ782533074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4ef6ec0265df59f6d33a8ed5bb1ddc9b5f709b163ddf70468f0dd8f40c7186. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ782533075.