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 0x689c0c3ee9cbb3f9e2530209dd1c6e3d128041e7cf712d762e7c66d336623f11. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4df6fa19-2cef-4a61-b502-8f111eff159e.json and https://artists.proofprofile.net/proofs/artist/4df6fa19-2cef-4a61-b502-8f111eff159e.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 0xc075e05ca8d9c377172eae4127535b7bb161d6fbf84e692941eb4147753e3aa0. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:18:56Z), 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/QZYHM2413659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1219921c67d6462a4a6297530c7b23856749290b50188935973f5dcd347c8658. 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/QZYHM2414171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171558dadb4de4f73a6a9ab0712d5ff14d68fb11ecfef181cc64e254beaf3da4. 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/QZYHM2415833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afa0b694096bb8510a9efb64d6600300e18ae53b27f023e6969180780c00e9a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZYHM2415733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21c6e61151c1b2fc20d0993db2ea8f8712969361795cf0c79c552c21eb660c0. 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/QZYHM2416790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87780279708c24875b564c9e333a9332ad3a292ddaab9bd4ef6d8db7bc63d73. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZYHM2416542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc913e8bd0463ad4c3284254dfceecb56a48eded28d90930871f7bfbb0b76d837. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:54:51Z), 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/QZYHM2416767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5a8a6405a13a8542575615924176e3e8f481638da14fdf188f4565ff174246. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZYHM2416999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f3936a096dfcdea2f30309417b44b2fd133afc13ff3c4fd1b8fd2e2c8ffe1d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZYHM2417246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9915c3bf1c9de5847318e30f5ecc5699b1e6761269f1f20957fdb36420b4592. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZYHM2417659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91a466b750b895fbc47f130d814a517da5afe259a70889c3a243fec0fa13e50. 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/QZTPX2438820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878b6f1e8696b9a0c67a8c6a8d8e601d8114e8d1af2bd9a324fe7e960e065df3. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:56:09Z), 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/QZYHM2424618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae9a4ab850cf383b9a9c5f0dd2a9e6f7f1b37dcf257e7d145b5ff982cc9c10e. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/IDB832504079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fb2f3f7fd7a3af092fe0d84c148588b618e347384720d4c80620cb09153c55. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:25:49Z), 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/QZYHM2509276.