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 0xefc14061e25e8e9aed73b3d6375f15344bc2d994b558ceb6dd318e6ac54b0cf4. 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/c62fb772-d131-4b0f-bead-22d6d62c2e93.json and https://artists.proofprofile.net/proofs/artist/c62fb772-d131-4b0f-bead-22d6d62c2e93.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 0xf72a7d2537117f55f546bef716cb3d605afdb4698ae20c8379388925b9f6173b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USA2P2127669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce2d8852239c693863cf5ca687146bbca9bc6af2ada8951f50d9779d159cf96. 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/QZFZ32212114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf491977e7b4586a65430986a37b052bc200ca1cd171a1fa682e490ffbecb9bec. 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/QZHN52238280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf491977e7b4586a65430986a37b052bc200ca1cd171a1fa682e490ffbecb9bec. 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/QZHN52238280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6f9f20e1236700b3a18516cf93c6dd008402a54da36739416fc8ce573d8183. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZVEM2300696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb72fbf87140e38fa250e7305806f914bc2c83d671fcefc3bb661bed248f09e8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZVEM2300697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1f9b4328271068416e3aae8c2473bab8f64a7f15dcc8dc08f963faaaa4a203. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZVEM2300699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6744fa768142b8a76e479583f0f320474ddd79264dc18a3598221025dbeb5194. 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/QZVEM2300698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2c0fb84b91c53ab11b2cb7fc6626317820f97bfcf635df5be3470d46d520e7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:22:50Z), 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/QZVEM2300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633be169bad2b8f71b816d9463451101aa6a76495ed55960bd54bfd494a67631. 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/QZMEQ2457172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b770b820fec1794828f57998c69098101b221add2722e9ae7c76eab13bc60cb. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:51Z), 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/QZWFJ2474359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba65d7aecb410dd16f933e49120b887df30a93a19516c27e08bf18cecf1ca55. 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/QZWFV2540896.