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 0xcdff96d8b45a1711c5afa46b12c651b3189bebdbf5f47e63ce5b03ab74987d30. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbab689c-5b4f-4e62-9478-8a6ff66ba30d.json and https://artists.proofprofile.net/proofs/artist/dbab689c-5b4f-4e62-9478-8a6ff66ba30d.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 0xdf32091acda9cd5268e328c6949cf9904c692799295c3bee82d1516ad0fad39d. 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/GBUQC2201201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df815dba5b2a572c1659b596fefc306bbb06e9db77e94af3d0594819c2b6f8c. 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/GBUQC2201204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418ed9f845c115384dfced36a403cd5f8dad59e0c528d3d6c75a9f9d1358c32b. 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/GBUQC2201206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dace4e5fd40522240fb57aae985f5baea0ed1270c0ecb6a16290811dc20c143. 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/GBUQC2201208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29392b19e6ac910d9082422b448d25eacca6279371f340dbb3bd64647906b326. 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/GBUQC2201209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5391b977e13d5d209d23ce0d2729f5f4086f55ec4fc0a699cf597d32a44c01fe. 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/GBUQC2201202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70914ba27c1591e529c3b739b5a3f3936f826dcd5a902ff4dd621d542d513ed6. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBUQC2201203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ba4149bdb3ff4d3d27d122feb866284d9561e56b88e58880c9c1bc1a81c8dc. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/GBUQC2201205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aebdf226e45c0e7c395cf3582160f5c568274ae24a09753d5077fd64aaf04bf. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBUQC2201207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337ae862099a59d7b401206e0e0ae93b0a3a5197e851eda0557554cad7f38294. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBUQC2201211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d71978eff3e7c1805b57e02ee495fc9843151241376be121f1dfb77cade299. 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/GBUQC2101067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0f2fa557541c384f993712e1bb9816c76fa97c4065875e25513d39b039e5b9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBUQC2101068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94712e7bcece6ad847de9a5b626f9dcda5bbc110fffa9106c55c8812cb84c007. 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/GBUQC2101021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8c74c9bfb97a6445c9063ae553caf7f8d0ad6bd4000a5b74e5fd0c3cea5627. 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/GBUQC2101022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bf0fa63ef3795aedafe5b826f67888b2eda78092a617a0d3658976dad58581. 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/GBUQC2100758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc912553d73a5ddbc823c9b53c5ebee9ffa6b9f286977705d297c7afb62d7662. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBUQC2100757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d3880dfbf2e433ccd608c9fc7ddc9aa5766268f3ed8ded15c6dd765be5210f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBUQC2100707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c6680cc8ad539058cdf46fae83812241c69e5cb7b6742dce084cb22a4bfc7a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:43:34Z), 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/GBUQC2100706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe71a4fefd108922b82dec19bac66521b8d06e20e5cb85713cad75aafd94db4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBUQC2000622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33de9c1b5e0e6b9329061845c948cbc9797b81ccbc17b072cd8cf2eb6be7fc7a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBUQC2000623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d53d70db28fb6e892bc0e58c73948a42799eff5bd55234187ecd47d50e18cc2. 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/GBUQC1900149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8073c0444eca4005dcf64b5396db3ac1ea3852532ca252b6420e254fe518bc1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBUQC1900150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19eec55ed39afdb51c7958425b0f85ad3259265f065fafc32b7cd46c19e31435. 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/SEVGT2100236.