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 0x7bb0e30236e2a4aef1b8ce96afa882485f0265ac69e45caabb2949b315ecaedb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72005bae-0d7e-4876-ad57-e91dc751abdd.json and https://artists.proofprofile.net/proofs/artist/72005bae-0d7e-4876-ad57-e91dc751abdd.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 0x1c95d3af1aab6d491354f27fccc418d5111d1f68f9af56991da6fce71ef73fba. Chain 2 (Bitcoin): anchored in block 957961 (2026-07-14T05:58:47Z), 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/MX1721600751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564cd79309208507fb2f9d35c620365c0314b9af4f7d0df37116cbbdee1e1962. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/MX1721600748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d23d02352ab84ed3424d25094906bb176853fff9a7e4d7374ce4729edf47f6. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:02:47Z), 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/MX1721801026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03d5729e150a914aa9be70744906a8515903fb8f08b1de2fffd5ed5a5eff660. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MX1721801029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ce987fce406cbbdbd60b0206d56b5eec7d770e83a904ff8d40158048463b58. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:08:54Z), 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/MX1721801027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a30527a4617e93b146f631292dcf5eae59d5e97bbb38d168ebc9db66cea149b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MX1721901115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4774fdc681f1fa6a6e078535168b94dc36e37024b7492a3bd5554ed436a2ea36. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/MX1721901133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9cf78b3800d020c009198907524f6097010b3e308de93f75fffd57f613043f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:03:08Z), 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/MX1721901135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4774fdc681f1fa6a6e078535168b94dc36e37024b7492a3bd5554ed436a2ea36. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/MX1721901133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4ce31dfea366b24153b844d574ccbfc51f14eff1526c34def4f3165c5f1428. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MX1721901132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910940a308793730ade4e19d002920e06d42648610218661ba02ab25f6906a14. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZHN32138655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9784c8c54268d7c1d2f8acadde0206048e934bcbd7b7815b92368c1aa4778ed9. 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/QZGLS1927073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27638412eff53021a6583152c6cc3fd2c330bff5a78fb01aa32639ac8048e10d. 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/MXD782101674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768ade46a495b5fe1687a5be6042719c4943d16f2b32fad592b898e56f6fff73. 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/MX1721600819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614b3cbd38e07f21ee0acbd4c60726055e3a9524a5aec910a670e0a933ea298f. 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/MXF152100785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61fde0396823eb89b937bebf90eefc4f9f10b130fa8c43e9e1498d00f3f3ae5. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZGLS1903262.
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