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 0x8d0710ab9510055ae882cd4e9dfd27b68d96df22984902a58bac8abb57e046fa. 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/c2f4254b-adf4-4be0-8d86-430d5adc5d99.json and https://artists.proofprofile.net/proofs/artist/c2f4254b-adf4-4be0-8d86-430d5adc5d99.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 0xe5f15c0057b640f658202f579cb872d181017c12363e6a5d299015b3e35dd0a1. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/DEQ121750737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5799c3afc1e7a024b2c46227839d63ac09a046bee2c58b7c99dc6ccc25cf2f5a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEZC62411549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b053bc1762769370828e6fb298693422d850ea9dd1fe3bb933fdb35cd863f5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEZC62411551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7ca80c4a3ac211adfae8e6463d602deca0f21a416137d72ea051f6ee3d7ec7. 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/DEPI81901695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f1f49610420b3d3cd3c4dba3ee030c703d47280d70e1484d6a964b8d41d363. 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/DEPI81901683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e4a6491bcf2b535d1fd9c538839dc10af1c87e603c18cee426670c8536750c. 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/DEPI81901684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4ead28fc28f6697445fc47a84f3b233b8643c1c9f602ae6fa9377f0ddf3135. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEPI81901685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ec795e96390267cb96ee13297357cb5afd692ea41c2e1256fa0543fbd23460. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEPI81901686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e694e39c687d7c2cb975deded48b48edcc1eee21e0fe0e3f3e7144d638cd2c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEPI81901687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c30e36eb86a2570d993059fa62929a2e6fee71dd7d0cc704ddaf7d0f8c8f45. 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/DEPI81901688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0479febcbd52439a42cc64f3334b83c6d062aa063569d33d6b302556b667e4. 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/DEPI81901689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5bddcbd8d6622eebc579f230b7c9c2ae50f41fa6dbe82c429335584244ab3d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEPI81901690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eac65a42c1957e023512ef5222762cabbedbc875e6672790bbe39df8fd4cf3f. 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/DEPI81901691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfeaa409ad57d1d0c27a3e032a951f62d7d8c400db08f2336f52776cf6127fef. 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/DEPI81901692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe65d7b4f0c8abd7be57fed3f5118eb8737107a3042c0bab544fe69c2d146375. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEPI81901693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376835d2dac82ff53e6452d772601f6f7921a9d3127e612ffd5476ace183a474. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEPI81901694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0766ab7cbfc351e228be78281d3f18c2a9a597db97c80de19a395a9e13911196. 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/DEPI81901629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939fd37ee7ec869c6762a092c0befca0ef29fae591a249f10f98e4dcd23855ad. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEZC62270102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678f5ab1c259b01fc530aa4f5f5ec862b6fc2d9d08b3452202178e7d27d54967. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZC62270103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2bc62ece9b2f2d5c14b07281ee4235fd62fda76d66cd6017d6a8c5ca8087c1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZC62270104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3870fe0c400a91ff360b0b9040ef10e1a347f08de3f63f3d7c6f74545a35979. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZC62270105.