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 0x882d0bba3a7ca291cf28bc89ec63c625fb9ded78f7eb058f53f34e941ee5069f. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe32957f-1caa-42f1-9da8-65adee2cc81a.json and https://artists.proofprofile.net/proofs/artist/fe32957f-1caa-42f1-9da8-65adee2cc81a.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 0x0e2227f91a9bc1774ee8ef477df22d44a283aded0c39fd95b663653617cee997. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/GBLFP2458764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fbe987498b42b41a54b2c0b6d1df8b31c8e64bee4f29a91915e44887a324f4. 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/GBLFP2458767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42248d822940bde3d70c43f11947fb96bd94c8995d0a940d92ee9281ded532ec. 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/GBLFP2458763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0b2f2fed1f6a8e8ba249f819e78413d43c4b3e60bd919253801fdafd02ed7d. 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/GBLFP2458766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e4ffcee03c6ce8736fea199f4a5a16a2307d12fe5ddc9a7e8d6a7bb57ba0de. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBLFP2458765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baddb3d3d912cd26fab48b480ef64296819e924b24aa8283a5a86e026e9d019. 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/GBLFP2458762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d05db20ab0f0d5f715cd06d9f93e17d8936543226b3522d11cdba0aa0bc463. 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/GBLFP2463267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd994d88ee4945cf72b591c2e541803c29a9be9f4bf85777b783b8c9bd5b0f38. 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/GBLFP2463266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc349ee95d40f411b1a4ad2218057ff76a902ce06c5f21b28d359808736ccc043. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/GBLFP2463262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4210c054b47f21f0151b55ce833e2e9ee3734f0cb8ecf42ef48b562fd411d3e5. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/GBLFP2463263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8736b5921d6b3686ddd3bb6b4b2c74ba84400bad60e1da6293746a6c09de59. 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/GBLFP2463264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f867eb705548a94ebd68fa2e936fee4e5de4e08dbf6742dc41df4fe985932b8. 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/GBLFP2463265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3b962754bf38bd444cba7e6858717a4b20a776773afb222f726e59ab98d1c1. 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/GBLFP2485896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4f34de9400260e6b52c008d1aaf94b7a9484d765c6fd52e119955f27b6fbdd. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GBLFP2485895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d9164d78a9416acb030962224a69b878458e5e7223654ae92078827fe934de. 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/GBLFP2485899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de0d4fb87139a038200248e2b91780836d915044a7ba3b5524cb9d39a82f3e0. 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/GBLFP2485897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a304bd858fded7aa6e39b3df743bbd3def2e85d907807498ba47ffc29855acf. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/GBLFP2485898.