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 0x2e1ca2abf03b2656d7f3b94f1c1432a59aace46935dd4792b302deafda93d90e. 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/c06cae5e-0518-404c-8c4a-8e3bc32a4a2d.json and https://artists.proofprofile.net/proofs/artist/c06cae5e-0518-404c-8c4a-8e3bc32a4a2d.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 0xa3c493bb5f8c98488e5e2fe1320c23bc6a0f1adbb75be02df8245b15c2ec87d3. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:29:49Z), 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/USLZJ1387028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9724cd2b91eda36ecb0ff4bb5dbd5b4c9a29b50e56cdf11b6a6abc94574d7a10. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:25:16Z), 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/USLZJ1387029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc35a56dad61f8cf345558d02a57cbb52516bec95f3f96e7c1a547a3b2c8bbab. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/USLZJ1387030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190bd24790ae96acc11da3d4d6c5b6eae956d49e6c9def70d6e99bafd89c7ee6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USLZJ1387031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138035c6c247be9847d639e2ac3f7d84a0e09f9ae9423a4f98056ebf80c316fb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USLZJ1387032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa091a93b7c141689cbc97945a4b6022cd00cc63eef9320585c1eca2caa97ba. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:08:25Z), 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/USLZJ1387034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c70dc7ba655938fef2f98961e9b26be83a5f0cc6d7a7cb6d880876be3ed37e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USLZJ1387035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07cf9991cab6bb1314542f3996f3952ed925cd68e11ab29a4a02a591e0060da. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:19:20Z), 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/USLZJ1528225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b258c306a79bf4ebee4fead7f16050d0a0ad95073b838da56ad5d64e4d3ef2c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USLZJ1584848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689bbc7eee1578b5c533734491ec11c5ef904ac75bb539c9d8f2271602822230. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USLZJ1584855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0b751e4aa4300fc720788dd3d446f9a560e724879dd6924a95276434df90ef. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:44:44Z), 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/USLZJ1584852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38340bed3ee44e58405b1fccc745beeb6fe212fd4f443647bed62c3615badd9. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:27:01Z), 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/QZ5FN1770328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d3376fe501725d306e2f26b6e3eb6b6cde13c8137d80b30cdbba8992ab98ee. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QMVU41900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5636fef8825286a5d65f2061fc684a8657d1be0782e658233d949410dba0be. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBRKQ2165774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90334b34e7df92dbabc726f60fee6a5b3286ab2e9034f7830579bf0e2751304. 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/GBRKQ2165786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420fc4f67b433675d79738e5362903f5ff2586976770e2ae6de5b24ef8c76ad0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBRKQ2165802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59005f53c7f65ddcab1f2d6eade99642cb83776532cc7018529f5c834286cd4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBRKQ2165810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f3b073813ed4cd90b904c72bd9233c9ab8ba416de11a243f0bebe5a1a192f8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBRKQ2165818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9845a721abb247de11ac5072230c3769bf2b5bba093d70f6dbd2cb95d7c12b. 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/GBRKQ2165820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf51b83a337209af836e0b5b38ec056630b531e790b15fcfa166738f08b87717. 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/US5ZL0900122.