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 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 0x065c94b94d98039d876110eac1de4efa73b8f8faf76ed894af0a7c584522ce86. 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/1e81e2c5-21ef-47bf-beb5-ed82c1b6f004.json and https://artists.proofprofile.net/proofs/artist/1e81e2c5-21ef-47bf-beb5-ed82c1b6f004.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 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 0x6c672c7b7fbdc4ce870ca532032538558b05d4965bb620df5d7c354d4d8eeb3b. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/CH7811707815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8b4bdffc70fc1b51a942e1e2dfb403b86619633624640958c58d39452375ca. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/CH7811607121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79ffbb9f27d35bf888c5d4d025afd9c02dd8e43480c45dcd83a4fec7fd4ae68. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/CH7811607122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a63394485ee79a54720d8948903fe7fb53e64432c597e94234a25be8808c6d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CH7811607126.
Das Leben das Universum und der ganze Rest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb726631e30460e85fbc3ba8e1701fad2659b2cddc7b24eb9aa1d748b270c092. 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/CH7811502209.
Danke für den Fisch (Frederic Choppin Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dca8983c583fc2e12925d86d166eb62b92672554f058568c452a4eb1fb8fcd4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/CH7811606808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623de131bd1d19c97c09e697505a99181833850f5ea5c815b231710972b0e1fb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH7811606965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282fba844bf983697e3aafb5e2cfd406d9190636664682bd974ee74abc79a218. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CH7811927655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe20ed130975a52f60b97f8ac1051d31b497a8dfbb51aa57d01a08372e5695b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CH7811927657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5373ffe0c7ed7c880f53a5cda9c37e1b4f0f78cee594373a18cc642f3817a6. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CH7811927659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6685a5252843a6f95536f02e2b940c6bb26e875ec249240ca1a82ad474caff1. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/CH7812043832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4075f4d6ed24bf2514bd632fb04c9155d7764d4f5ac60b1335174414309c9e1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CH7812176722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba247f15a5140e73b1d2f55336df851513536cdab1ac4c10d2e43a437d1ebd0. 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/CH7812181248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcecd966775af734b36b017aebec5567c07a4a879c0fe5ab05c1a62fafbfb82. 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/CH7812187755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2308d4d67cc799a3b47ae21e2949c6b411952cff3ddab51861996d037506ed2b. 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/DEZC62127108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044964926694e66a78d00ac912615ffc1b2df99a780810c2ff4ea980870dd4c6. 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/DEZC62138331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093cb80c0e0f2bbc21940311dbf42c41ed57892a83754a7e1c499a7ff25305d5. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DETH11500083.