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 0xc37c9adad94d35dec8a8c4428ac67057ec06154b4a1e1f68b54635917b4aaba1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09bee097-3492-4e94-8d36-bada5f61d30c.json and https://artists.proofprofile.net/proofs/artist/09bee097-3492-4e94-8d36-bada5f61d30c.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 0xf318c44fb6f51070c058c372d47f99e45072d305c56a7a21ae482b678e4d971c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/AUEEB1300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d8b73af71f3dbc771db942e0a0ee936eb9895f0ae7f16a78d57a2a67889121. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:01:48Z), 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/AUEEB1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d8b73af71f3dbc771db942e0a0ee936eb9895f0ae7f16a78d57a2a67889121. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/AUEEB1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe712e88e81e5b4d667265bddec695df8ced290f40f97e32d6990251f2cad99. 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/AUEEB1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d57db997b57087bf7720ac8fa6873db5d22b33cf4607bf0336a85f0a70112f. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:56:31Z), 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/AUBEC1702729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189f707c207da99a01655ee5a0b75fda3a84e88cd9bbdafeeb8c3d7598b869f0. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:29:14Z), 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/AUEEB1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eefbffeb26795c7ce1706a49704e67357ba9f79861377bdf07f3268950541e2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUEF01500824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a541df9a966a38955d6c49c0f08203ee3673e2def28072aadd2741e405afb50. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUEF01500831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0231112d42c4f5d0d37c3455f9513b4980480eb2b7a89577a13638259f654c2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/AUVAE1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fffa0071d2fc537de96c46708239705156c6d60af7c045a5b5d27d4a8f5d48. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/AUEF02402229.
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 0x4b4e52623c0ab27a1c78c31d4576e0fa5d58c67cd5c04a419f96e79883c06e75. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AUEF01600888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813bf7ea125ff447a55cc13a550aade01e5e1b572e1a5b60b03e9f620ac73eb8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX452281679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0a84fcf19b66d2000be79d103a60b3afd13796b51b0a4d9a3216d315112636. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/UST8K1633717.