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 0x427340d4b2c4917a17c68aadda74e97930975d14379b849e29d6aebf53b797e3. 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/a2687a68-90a2-4b0e-89a3-7950af54c591.json and https://artists.proofprofile.net/proofs/artist/a2687a68-90a2-4b0e-89a3-7950af54c591.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 0x33c2e2871d47294e696d4e61da1d1f39017d147a9a18f6349cd10eb359aae48c. 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/USMC18930907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe891bb2af482718bfc5f871f9d7f5497204899c4491c2e63ae80894b5e1f2acf. 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/USMC18929642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd140c05e550c05c726a9e7447956b44f0c4019b9f1f7d322c3ec55b5511c4d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USMC18929581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8749e292c9fb1297742416f8c9af7bb2bb70f900668591343fbf0b4ed6b04a83. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USMC18930773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d4aa794c0a6a5dafb3994b97e70849cacaf3c1783b78e7136f30e4db251375. 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/USMC18930597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a5615f21b1364232bf092f95ff10d3cc26b843103b9e8322b60c11538b9e2d. 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/USMC18930910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb87707000ad5850c7c128d4e8105fe6bbe80982e984ec75ebf33508d20b45c. 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/USMC18928953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfebd65825fff39e72975901d746cdb4e5143e7fb603221b5c0ecaa64f91d4e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USMC18930908.
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 0x7893bb336c993a7e2565afd5b40f41844e4a6a3eee566519684b6d61e5940c3a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USMC18930909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97df1a0f7fb613400c4f40b3e12eea65dfa3f5685c67b5ea14eaf0a338e6519c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USMC18928778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb5cf491310b4d8f5d3bcd0236e792886eb0f5b833dfc42f27b97e4d40bc256. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:39:25Z), 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/USGR19400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e76f889b7cb978908521e0976b6e8084b633bf72432b86cf77ffada95c400c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USGR19400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb746761bbc42a1231b1af5938136b814973a1051754c351b7dbbac9bd6cead. 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/USGR19400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13d69e3af797dcf5eef15f4b09437a606ce3ce86ce44abcd3be7be613651e0e. 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/USGR19400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066cb3f7038805a3a68961aad3a3d959485e588731d777d28c00118775134f8c. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USGR19400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd856d5bcaa427276c1f8096572b3208118564eb498ff2fc487c6c478108138c3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USGR19400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45079b17e0c26db077e1102e3a7afbeb9e57566a8c4b7b67b1ad93af89707846. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USGR19400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf82788979e4f4c1ea0ddf88bc10c9972bd88f09f068eca2109dd0b51095176e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USGR19400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b71bb314b39f4c634334cc3dfe04e3d12aa5acb180fcc7e6678b81a6d05845. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USGR19400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a69723cb3ec3276ce5e70ab41ed691f043e16025ac08d1157d5263911dc60b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USGR19400090.