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 0x461f4230352e888ad231c8ebd1599fd56a4bef00e12e841de49a22c3ff9b7dab. 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/3a670631-72f3-40b5-b3bf-03eb6b85dfd6.json and https://artists.proofprofile.net/proofs/artist/3a670631-72f3-40b5-b3bf-03eb6b85dfd6.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 0xbb6af5e94983b77498b700c53f8a5d13ddc39d0428e8ee604ea016e7ed0751c0. 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/NOUM71700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ec5fa134f62ceceb924b9017ed99ed7a7039be53b3fefeade1ed1c12469458. 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/TCADB1748830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba55073969038ad2ac2e967aaac940ff318fb29d201b1f8546316539aba7047. 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/TCACZ1769670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59ef37ae4b82108b5b5f141304cc83b2b31b1e239d0d2f3abe11496cc8b468a. 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/TCACT1619109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a2036ceb13da28fe6877eb0eaf36837674387f334d9fc52cff91e66831c073. 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/TCACS1661757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ff6aac4ffeabea66ff01ecbc26f27fdbb05c10143f3287d1ed86947d68726b. 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/TCACS1624693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ec5b59e0c74c5dc31d044c8dea2828cfd15575e39ef96514a5049f17b303b4. 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/TCACS1620387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9837c16c9e7f780ccf4e38c13c6b977dbdb07f1700a74eb82854a166c20a4d5b. 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/TCACN1604474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5afef43d5a735c9f2adefcfcc84bf2c9f91b74241c9def6cd6cb1477081e651. 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/TCACO1607498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5fc73f7be4a80125625fed86c7ab4b4222fe350eac060b5613d1c526b84533. 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/TCACN1679416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6555de32faba948d274c3ee5c2b78a82e67eaeca08e8fd7bdb904c63eddc468a. 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/TCACN1654488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612e354db8fdc62eacb488e1e71dc0a3b405a953b51f090be0c2fe1810a795dd. 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/TCACM1691079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab1f1fe8132c5e68b557e5063991249fdc641e2d1b7f346b294621e7ce37f7e. 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/QZES71934421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9e16b93b773a8289b6fea93e72eeb96564ffcd36ac5b39fd8f1b1fe38731aa. 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/QZES61960385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa463da534d9a8966766492814856b155a5270a7fe8cb2e62aa56f4ee8c49f599. 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/TCACM1686281.