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 0x2247e5fcbe39ef13c8cf927960e278656f7f6cad8df9cf2f372b1753676eb0a1. 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/59b061e1-932e-45b7-a02a-b0df492a2851.json and https://artists.proofprofile.net/proofs/artist/59b061e1-932e-45b7-a02a-b0df492a2851.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 0x20f2a551329d485d59ea96f0ca06a5636320b7828594be356b2d9ff75eb533bc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEA622000861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650c64645eafdada30d495791abe057d4e58d59ae2bfb6e8f5fbab11c581150e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:44:45Z), 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/DEA622001493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82230f61c920fb4fc90389adb9f515cc3ba325f875574e0c255e54f2b4521b8. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEA622201578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b48cd098c53d32e91cbf556648dea4914ecb27b6a37233c716f3b218241c21. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/DEXN92427777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde26ce5b64f579af0fe8d4257ce72011e00625dfd449aafdc7a5f453472b3bb. 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/CH7812369059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db800f38aca05d968220423aa1837add9fff3d2b67b816f75da9dc0ca7d0d22. 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/CH7812400240.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65040bab1cbc7ed0f078fb8439a524736811672eed4a6ba6d5d30ae38a46fbb3. 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/CH7812365435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8011f7fe28468ee4be49e8b5767b15759e78dd95140159b23a462e175397085. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CH7812352680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2f9f26ecc581f93cb40f8a4f068cf3087f3193423a9b214219ba902d8961cc. 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/CH7812369715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb2c3ab4b33e43167cde045d2bf15e0f4d7c277593b6a491995852fa657618b. 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/CH7812365780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58696a80afb0a54b906b8f18ee40a6cdd32752648c47a7a8c4cac0a777d6c653. 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/CH7812357083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e01d0f534d361f125ee9cbf62e14491c5c6b3d696cdfb67a103759a8a0785e. 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/CH7812370025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f282d59c27937dd04107d274ec560d907af5df3616f6d9da7fce6f259ab03d. 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/CH7812368269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee002198852a0f2b1a0f986cd295a3fb1135b7b8c20f25895d5ba7f91732975. 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/CH7812358979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65040bab1cbc7ed0f078fb8439a524736811672eed4a6ba6d5d30ae38a46fbb3. 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/CH7812365435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06006e511bf90e745a69e0c324cc27ce646e77b600c83983384c50449458e91. 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/DGA0R2497819.