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 0xd95c15a90692417f6fe84cbf765ea2d8e193fc58eb5f1bc471d923d92169699c. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f855e8ae-fe19-4e2c-bff9-2e61583c7144.json and https://artists.proofprofile.net/proofs/artist/f855e8ae-fe19-4e2c-bff9-2e61583c7144.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 0x83fffc99796d06fb827fbe91cf2af55032647b41074c04dce67e8a3df24c261d. 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/QM6DC2097371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70024a906da029fde6f6e40e6d648d1ff47b4a905a9d8855ff776fa2c10c74d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6DC2099548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0589adcd4b3c12a26e98e32cf05ef64f96ad3ea6c2f1e8f8f0c6af4b5d205e. 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/QM6DC2089909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09c7602472a604f6c7dae2b669255c44d102a65c9ed84bb7b8e20033b1a0beb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6DC2097705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435fef9550f05dee363c986da1f197cfc440baa83c35c96bf9d6b6393b9ab7e8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6DC2094223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0589adcd4b3c12a26e98e32cf05ef64f96ad3ea6c2f1e8f8f0c6af4b5d205e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6DC2089909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b966b9be5e156941e25f72bc1855f325c4464a01c4c6f7763d1c72783db9ce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6DC2099597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b8eba34817b159b7be12d91fabd9b91805e5f242aaf07293d52a0155f5f387. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6DC2099600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3b232e9833b9b297e0f1b76a672418150d94b983cdf480518c351033287ba6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6DC2099602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf8836ff7427b5f68a5a31187dbd1d3fb7381c3be3aa41b5a6a1ecb301aaee7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6DC2099603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fffc99796d06fb827fbe91cf2af55032647b41074c04dce67e8a3df24c261d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6DC2097371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0589adcd4b3c12a26e98e32cf05ef64f96ad3ea6c2f1e8f8f0c6af4b5d205e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6DC2089909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b966b9be5e156941e25f72bc1855f325c4464a01c4c6f7763d1c72783db9ce. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM6DC2099597.