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 0x4ac0c100e989e03c726611f02379055a9d3e4dcdc43bbf2710b092c575e1a3dc. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9254284a-0c1c-4503-a932-8dfc7683f208.json and https://artists.proofprofile.net/proofs/artist/9254284a-0c1c-4503-a932-8dfc7683f208.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 0xe31f91fdd490bf994e516f8e7e0151bbcbc152f0f209eb4bb3df19f67a7e471e. 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/DES561597501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65ba8e3455165b9976305a1bc4c91475e28b806da51bce5847dbc1afea00aba. 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/DES561597503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab67a13d7cae7d95e51381fba22a75c7c299f5761d4bbce2b0bc0813ce305be6. 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/DES561597508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209b5f72b4841ce369cf6000cd64c4a311f80f2c4b1c6fd7c3020918b9a54f59. 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/DES561597510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c8717a290f864591aece5b7bfecb32bb1f883bf55bcbb07c7cd331adfdaf4c. 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/DEBL60926083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4953f60f16b40eb96de4231a61843cbf616fa6a5307e0eae57e1bc9d2ca704a9. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/CAAD20610881.
Square Matrix 002 - Limited Edition Bonus Disc
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3787402ba799817f97d33d3d578e42365b649856589dec430904aa71bec5c5e1. 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/USHM90430371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ee9fd44d0036e9a4bc576cd624ae37da32edf472115dac945cfe59acd3c0d0. 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/DES562018201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69dbc71e35e31851930d7f8e34a80e12250a323e1640667410370e31ab8fc67. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DES562018202.
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 0x5a7a2eee83596f763b2f6fce3815b1b6f7919edd6b6beda322138de8e060f3db. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DES562018203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011aad00c936c72a28d2cee148a90b4c29a9dd0607e862292ea4b2622bce5920. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DES562018204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa044283b62702d09a2c23b5357cd096b731798f964b421e1cf14aaa213be61dd. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DES562018205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22056229f8c51da9ba49aedf6c6a2b55c56706d61a1673d62245a25f4acb7439. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DES562018206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281038dd9b3dbab252ffc085950792903f270933319f3da33bad01c3a8553345. 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/DES561693102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0606cd3d330fb581e483243d8dd62a1a8907826ea32783c9b49b45558c08279. 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/DES561693105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a6ab92ac4032f51e028a536ef10502239e601bf809e701f5524087015ec8b1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DES561693101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e04c5d8b3aa955bf4107daaa8bc08aeae808400733fafe1521023451668c90. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DES561693114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494683988f8029207cf77feff32cbfc06da2a60915ea20d045ab030c1891fb13. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DES561598901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf129a2679dd49346efdb0d34f0d52327d9f4eee8a2a9d7a7d003727b1e8b5a44. 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/DES561598905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5323f3c7934cd1ad45cf24ef7890fe514ef34f39fdf406f86409973e50d4e500. 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/DES561598907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24632fb3317ed8420f29108d9d92032aa06f3cfa77e541f79046582ec7854809. 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/DES561598913.