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 0x2c17854991c0785deccce77798d64e391eaa83613702cff35793cdddaabd4412. 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/6e7a55cc-110c-4e0d-91aa-dc9596aa0beb.json and https://artists.proofprofile.net/proofs/artist/6e7a55cc-110c-4e0d-91aa-dc9596aa0beb.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 0xa58f49200ac2deecd9087b52e74961b35328e3b3894e66e429e31fadd09b2bd6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZJG52045096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bfcca1652b60d561a42cc11b499dc91b87769b6629f145f641b7a827e72242. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZJG52045094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb019e04d0fd451054e1578f0b0cc3413f69a18e0e694a227000efd8f2d12241a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZJG52077840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a1b84f99157db0ee48379b32e59072149214efbe5075325c7079e2a92d7497. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZL382092983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e13948206cb59881a1bb8af7d0526ca415391e85f086021864cc5a75e97fd04. 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/QZNB82012492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eba5c0d6aae3f39a3de47c9dca4d0fc452fc38958d5a7f02c9af76abbf78d3a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZNN22042619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6c10bcc1b95971b4765d55d21c74a5fc7b0acb98d2505a6cfc6dc5c3aad48d. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USUYG1392870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17c0ce24260570b44eb73875a1ca14253c3bb050b07ff327f9b2e431c55d7b5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2406831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab965894faac2be4f31406f3966c94a7a742b4f91f62a66aab76b98d987c517. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/USA2P2406838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6069596a8995146f83e630f86c3d2a452d52883b05084d3fd477701efaef5124. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USA2P2406836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1c0c1bb01d61f5aa7f2683342d227e4916e324a7f50203cb42420b5003b6cd. 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/USA2P2406833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4390ec6c4aa912cc94ea743ed32c313d91ae1ff170050037437feefe182f8873. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USA2P2406832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6a88a6dc62df671d4afdc9c6ed104827de3ee646313f40473ab29e82743ecd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2406834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2312ec36639219765e8aa22fb80759a182d76f56efbb41d49a551ddde1166726. 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/USA2P2406839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d2e7e4bab042e6284a3a5f43c0c439956339f07de092d819956c6fa6071576. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZFYZ2584398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa4ac39ae903d1306f479c7cbe2dde6ba9c958e50e093018e08a411b57b3f7d. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZFZ42527867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1ac8c7321747b8c13d8f91526a69632c2b8166b9c1023e87d64f0190cd1b23. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTAZ2590590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f929ac27b4c7adb9b553b3f71418703ce32f5079e6040bad2426e7833489410. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7V2530687.