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 0xab4a08c1e1e84ae601a44b3f706b9ecf6e9beaa38f2b23003e8ca43430c7c13e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e045b06a-d52e-4498-af2e-4aab35b21db7.json and https://artists.proofprofile.net/proofs/artist/e045b06a-d52e-4498-af2e-4aab35b21db7.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 0xd16df11581cf050e106d748e186ab72c3ea8e3d5a9319aea108b7008e0514502. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:01:03Z), 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/QZHN71911838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba969172aa10ef183e30dc17e887336f5f5bccf89428467240bf41b4e86d9c0. 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/QZFZ22049774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ce466468e12aab8fb26e037acb2fcd7ac0d84d9e8ff425c52f62be19b41cac. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6K2091221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78b4da34423bb1e98c21089820a5bcfc6ed800202c4f4e2f09188ce12e5ec82. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ42146904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa08774a880d9910e92566c2fb9e29c7fea7b229e46414c240b8e6d180674939. 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/QM24S2202001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa08774a880d9910e92566c2fb9e29c7fea7b229e46414c240b8e6d180674939. 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/QM24S2202001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab6408dbc841c6ae827275f9e290d1e7c8c9dd48d51b87e26946a285aac6120. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USA2P2236930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc117c29f7e3e5dee0ace65c4d7b54fe45e01c13d1ab5953950c708c07efacd. 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/QZQAY2375897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbadfe3837cf04814a9bcd8c69d3f3b27a272784ea04014c41cd6f30b5c40c2. 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/USA5W2400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fa8898b3b9237a3a19b426b640375d3731741eb61e6260cbdf76cec082feb1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMF922050203.