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 0xd3ee8dbbc0af708f0d21ca407204ad42dd757f491a5ffd1e6e80e493ed3e12b9. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/720a4ebc-be99-41ad-be19-bc41b1859acf.json and https://artists.proofprofile.net/proofs/artist/720a4ebc-be99-41ad-be19-bc41b1859acf.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 0x205757b8fd10d9c47acb45b5055967c63e136eadb505a24e5a8a96a09a11ddb4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKABA0601003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cc25a1915ab6c5decadad9bf77b7fda5a8938c302840c2fc7191cde9526f5c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DKABA0600996.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae743a6d9aa6f56ca0c2390a1165a5a6e051ef05cdbd9b35a7fb8c3594e58bd. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DKABA0600998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1a7876c71834d05722c6e02eaf5163001939b4e03c92056248fcf56fc35ef0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKABA0900221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb4a8ace0e6d13240df2543080af12fc3bcd686c157fdcce11f822661c1c4d7. 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/DKABA0600988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2c5fd18954e1ce0a9f71b526a348f00724c585be048d856a3f0d9a45ba589d. 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/DKABA0600991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c40229bb581c931c8a1c897c0360ce0eda3ccd901c67d27f0eb44aee2ea2ab. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DKABA0601008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3221bd81a0d6f557971d7f9949b0c7191a4ba8e8ae52b687ce31144ced7e16e. 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/DKABA0601001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada3ce2d6a732bf430d5f9b39f2544df9c4dc89e990ecf025a8e96f04b3a1ad9. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DKABA0900213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb37a34770b647a76dfde16f34e61dcdf6da2f2b188c3d08af7ff74e256ba346. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DKABA0900215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2477d444e27fdb1f78370192c2c59e238680837d7b128069e761d91b350b6990. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DKABA0600997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd0f9bf63dbd37212d698388342528e4fdb9180b123faca78d948b965c6f7fc. 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/DKADG2400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f087c2967b7327111c44f264d660870d27af2a8fdb93c68a0e9c4b35c665604. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DKADG2400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a72928cb1a1a3f143c420689f2fca4a8c5a53d8dabc214cb3fcb48bd50dc4c3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKADG2400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f12e5bf28b1481eeb97bd9a62e4e52dad615b2a8806e7157b17187beb9d453. 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/DKLG91000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dea0cc4b0e558bd27fd2a03e823cfdba9c67d70cbeece751cabbc63558c9351. 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/DKLG91000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a1eb7ca4accd4e18fb97a8de61f44c8b11e07f787ae2eac4971d4a46698ad6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DKABA0900214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb4a8ace0e6d13240df2543080af12fc3bcd686c157fdcce11f822661c1c4d7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKABA0600988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb4a8ace0e6d13240df2543080af12fc3bcd686c157fdcce11f822661c1c4d7. 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/DKABA0600988.