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 0x4b66bf6a50be56480f1f8904e4a9d10a12efbf1765ab15814bed134bde176dd7. 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/ec18943d-a72e-4842-82e0-9a1a6ab1743d.json and https://artists.proofprofile.net/proofs/artist/ec18943d-a72e-4842-82e0-9a1a6ab1743d.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 0xc5054ae63c4309a26befefdf3bb28db7dcc1955724313194d36f2f8f711db626. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX8LD2340132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30142640bbf63389c6741aa32eab2a952ba5eb8408f9b87286dadcc3988d3681. 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/GX8LD2368932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42b1d935b076be757ead9d3743a0daa3840a73dcebf5f8451ccc901188015e5. 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/GX8LD2374424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2908bd38eb5c04d0357c33b3a0ea797377d4d7211aab1ddfed0bfffd579551. 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/QZWFF2332237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57d9534e4105393ec31f6b4f10b7fdd73845cfe7f994bc9a73f27f2ef9cfb1a. 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/CACWV2428798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f40c172f13f9c8ec627f85712b5d811c09db4c1fa71df808d3c828276c970f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZKWA2316027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b51553804782d0997756e028c87c96313b0c55069906653543e6ebad572b9d6. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:15:22Z), 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/QZKWA2316026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636a38155b07d994b20df1ce910b21648afc1d8858100c4444f03a53e9ef09da. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:34:49Z), 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/QZKWA2316030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a1fcac8c4330c7ec3e223091ee0c4aa381b560e46b99a9039cf09a68367fbb. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:08:06Z), 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/QZKWA2316028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2237c51058ba9e1198d57d5c3620254de9ddbf34dbf4406310e4ec09cb37523f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:35:11Z), 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/QZKWA2316025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a6181f85f3bf96b3ce3cad3950eba394e4e43c66fbf8a03d498533fba97234. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:16:14Z), 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/QZKWA2316029.