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 0xf76aca2743821819344d310838b9fd2016c1cfcab828de7d40e0c5f42aec1af1. 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/120d16e5-0c6d-40a2-bacc-0643a885fdb4.json and https://artists.proofprofile.net/proofs/artist/120d16e5-0c6d-40a2-bacc-0643a885fdb4.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 0xf7fa2859c48f63930539a4782c43aa3deeec76f45e561a9e26b34f981e4c82be. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USA560451474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c14a240564383a1e8fa735b25bd0e639f4b7c19748b43e2d53bbd72562edbfd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USA560451453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6727710226e73884cf72fee242e3a964282b4dc4a94fe5e1c0a3f40029a14845. 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/USA560451458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b957ad77b8fb04e97297e02d37b21135c00e997ba53b01153cd61db5479eee. 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/USA560518127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a84b0be9942ade9923d52c36a72be30f79141cdff312fcf688158a3da822567. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USA560518128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd4bb1ad93fe751ea02c75d85287b96a3dff195e474d401cd5eb24a91e98fe8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:43:29Z), 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/USFPN0900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118da5ae67b53e6fa0048c9844f325debe49bf32c53bf9f7a624c04c78c3d866. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USFPN0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb138c204f92ea99cba26482f0b395a078661645c7a5e69beb3d4fa9ea765190a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USFPN0900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4589745576980cb079c534fdeb8630bf052200e2096f6e9a435d48212b89e3. 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/USFPN1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb89618a4c8041671ad068be5c05e1e06dc047a44a69d9e3c7432bc810734bd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:53:45Z), 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/USFPN1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d1fcfadcdbfb0a14990a62b3c74988033af33684983cf51c627d0c3aaf060d. Chain 2 (Bitcoin): anchored in block 957684 (2026-07-12T09:22:41Z), 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/QM9AA1430857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8786fd553a7ad51a1fd35de6db926c97759f925182082a5fda7fa4653dd5da01. 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/QM9AA1430863.