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 0xe87c782e7ce65fe0b1a5e50a2bfb95c36088c0b5763ca0e67f22c7513ec487a6. Chain 2 (Bitcoin): anchored in block 954048 (2026-06-17T05:00:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4167e639-ba6a-45e2-80f7-e784bbb4afea.json and https://artists.proofprofile.net/proofs/artist/4167e639-ba6a-45e2-80f7-e784bbb4afea.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 0xc9e5bfe1deaae8e3f70998e574623f1272b0f9c4906394136892ab5748733634. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB52516969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8b10d23bd669b521d4768cf479817f8d29eeae25a34591176f9db544a1db98. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:45:01Z), 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/QZTB52536608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc37496b7cf8bebcc2efb7bd54ca96a7de8762ccf481a548aaae10f4cd770232. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB62500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c61f52b179f16cf9fef42760c35c09f8307bed81708d86bbb8df93c2812c76. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:37:40Z), 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/QZTB62500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8031967a929ba85c903f5b06c7e6fa92e1e4480112079ff93f006294f272d6dd. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTB62580473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd25d851da2bc8e40d3bc39c7703194d547b38264a318b7b272923161520b3a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB62582800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38918d3f186a07edd9edca522c5cd1a38661dabcda9d4a63b5ec3858486391d6. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTB62564601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714d2c300d8f97ea80abdc5a7ea20d1db74a70c09b1d54ea7b7270904ba5be98. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTB72509373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dccf263e9073821acd5dcbc829894ee4892f86ffd726497b623a582b77c8ec2. 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/QZTB72509375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce565cffe0986a3f4fdf7508a022870b6a694d7544f966fa314776ee30aa883d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB62592425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ab3b020f5ed1e3dde6df314171da2c18ae3699b5c18e22fe24cae42cf29fe8. 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/QZTB62590758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c968cb5d2704bf5ee6510317308d12287f657a68c8d692bdc81bf690a0cb8d. 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/QZTB72546372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573f7ccc3a02b4afb94501a3e2871286611227950ea6d9b664c12b6cbfc4e98a. 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/QZTB72542694.