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 0xbe23efbe91fd78f4c493e6f00a5d30c10a963f63b0003b1520deb7f096204ee4. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b3f4145-3bed-4434-b329-f535c2c34ad4.json and https://artists.proofprofile.net/proofs/artist/3b3f4145-3bed-4434-b329-f535c2c34ad4.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 0x824615f8daf864e107c3840f80bccbfbf476101c5149eb533e4856bc633debfa. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:09:11Z), 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/FR59R2371385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8d41856c4b09f152cede03381edadbd0f0c4542b555a9f8e22ecce3a446ccf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX282312308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3415bd502b382a8d48e775a21b37a99be377775c1574a939284b872d125035c1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DGA072320430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d354e6ea0c9bf8feb5cd68b9869f8d96b1606739313a9f4ec87346ae7b1cca. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA072328689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce72b24569519b0b76d04fc859b34b15d7935386422e8f50a798ce7c7ba5b42. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DGA082375568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b618a1092f2f2a0e4c70550f0d158f5cfd55e96f303bcd11492aea778bd796. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DGA092317667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8a16e8ead4904080529dde623ec8650319583266a4f83c1754ced5ec6fd184. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DGA092371702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ef5648d7fc7e2b7c4401a5273594fa7855bdbda27f036899aa244833201902. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA0M2326424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2725839583b92b05de64342566e9cc1c2d0c800c54b8a899aab89584da0e804a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DGA0Q2314930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d1ca2bf3761a671358fc8612b94f87fac737e8aa26fd9ef7a6a84dd37c4bb8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZZ972440355.