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 0xb82ae1686f2e7a9b7e2078e408fc96824d5f6cce6345972103587b44c90fb9b0. 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/c67c57c3-e543-4d84-9457-50892a26f6ef.json and https://artists.proofprofile.net/proofs/artist/c67c57c3-e543-4d84-9457-50892a26f6ef.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 0xfbc3be7ab3167b1d2564201e7331a492cdf3997fe873cee91aa86cd0288fd755. 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/TCADZ1884264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b7bfae3c4a83c24b664baf90b669f3acda11e6b4036c437710c5e367f85589. 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/TCADX1869801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9404225520eafa75add5893b507032440a0760187ed2c98dd9b12c26ba1815b6. 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/TCADX1822665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e373e149750fff94bb25b055c1874e297cc321eb16961f38c3cf713b6bc147. 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/TCADW1882189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121abb8701629942b885c5774c873ec7b01ba669770664365f74514dcf92168e. 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/TCADW1857995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332f9dda7ae051e1c439c31db7f22104472cc66c15f917e16ee9b52b18757deb. 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/TCADP1800344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c426713a04a9a100aba477a842869d23ba5990d0128542511d6e79234e3617e. 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/TCADO1824012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254652b11fda221659c9523167af6e0f928f4e6ca2effb028bcea79046206802. 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/TCADO1818916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682be42603163f7dc737bf0a1a6c8f7369a46d1811c2e19d2bb38a7511ee3ed6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADM1805921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca75c86cfc7f783dcae338fa7ebd9e2d04789ec92e2c81cd02c2c39da6f8732b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADH1768433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d21cc285dbbf3740902fff4a968ad91854e8625756e5a353906cde142e21c5d. 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/TCADH1768439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccc1f1b0493c275d15a5ac3ef35fbeddadb072d6205040ffdbd5d0f2c84d567. 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/TCADA1714955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5406747fc7ac61f1fe16b7d1eb8057736ee8dc42ad33947959c5fa3fbf83038f. 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/TCADH1768431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa840a8b9f01223472427002063a56db1693ef88556d58bf033f0aaf026576b16. 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/TCADH1768427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25312dbe91a7a37fb7f6e28b23a359790ca71f0008d2f5fe0b790cee9e0262f8. 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/TCADM1891420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a8fc3a3ba8f186e7d23e3fffa826998ce196436a58fe60ca8fa40b86e89728. 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/TCADM1805918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19f5de47b4e7d4f82732ef4a7e087d6eecec187819afca9fcb566669831d17e. 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/TCADH1768443.