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 0xb8024d1a4ffda460962421ff417d136e39e387287683bcd19651aff11bfdbce3. 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/bb17d206-a6f5-45a7-9fa2-55a326b47ea8.json and https://artists.proofprofile.net/proofs/artist/bb17d206-a6f5-45a7-9fa2-55a326b47ea8.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 0x648c43b9ffcdd4cd831392dd8584f29153f2bda8a6570274135598fbc314c9ab. 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/TCAGQ2206619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9455341f5d1ff5280ebeb5340e00a36368709ee651f1ed1eddf9a4dc90abb9fc. 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/TCAGQ2206657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cd005bb6ba3157c47f072dda46be338a30a616caac364c61419531cdc14155. 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/TCAGQ2206693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6deeb54ba0614f1a9061445fc67cce69844b5473ff81874de5f592e5ebe7ab. 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/TCAGQ2206707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b91da991d34b726afd1d176a555238b1f881455d37adbde63ce459d92cdc052. 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/TCAGQ2206731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34381ae5f8c9922a881907a6c1dfd297048d0d5403d2deeabe45fa9618008e9. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:23:00Z), 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/TCAGQ2206764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd047fbe5579a73c0ce871aec3efdb544162bbb75b85e695bc2c8a2a100bf7e. 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/TCAGQ2206779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278ea1f4c52d367c23719b4f684e4bc48fc4e2533e50de4b82be91a801c55f18. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAGQ2206814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6480ac43aee5d5f463f3370a24657d7e13219537b53121a37780e41a5d7bfb3. 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/QZTAZ2386787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7032d8037c12830273b4cbc82c6ffb4fea13591df737adc3741345508c7d3b9. 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/QZNWW2327769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3d9ac11f4d6a71b629951927278363a6c3eb9d6563c0cf03833499d64ad646. 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/QZNWR2373826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d89772fa5b3620d4911e5433f06f21242393a9b60bfb921343afc243647cba. 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/TCAGY2318528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe053b2a0087ea71cf248cf11425c94ca6520cdb4e1c658d867da57ba93118359. 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/TCAGT2385409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4514232a5dd6300cb325c4d906a39906a29516c3b9e144b5732e306a790b8cfa. 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/TCAGR2263242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d21caa2e65ffb78ffdb05907e779b02ff427ff7a4234efc5b4d2086c1cdf5d. 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/QZJG52263456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60691cedb5f87b355156f78fa750ee200a0131d76400148a513e082eb6e09ee. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFZ62463919.