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 0xb64cd884db170ffb23124d23f66ec9dd50fd642cd63e471465e2b4c0899dac21. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fccda44c-d581-41bf-bf90-2c83368a6fc3.json and https://artists.proofprofile.net/proofs/artist/fccda44c-d581-41bf-bf90-2c83368a6fc3.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 0x43ba3e5a5df81466f4c4ce31aa3c59ade369d3ba960aaa6ab36f72314ae7b653. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEPI82441176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7a3c60f8bead907c3ffe88882191ba7724e7c9e63f72aea590546717f98143. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEPI82441177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43e79b0ad6ef7b5f3d3349bbf8cfbb488c496816893ac0dd5337e446861f6f5. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/DEPI82441180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25f04f224bfc9e3b98b001bdfce9f849db60b54f87bca79180a54f3679d1c95. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DEPI82441182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc865ed930a59680d34667b959a823c79abfafc53879a7e7385f85b4ae4cd8fa8. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:23:29Z), 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/DEPI82441183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05757185de72a59d1015d55ddb2923494502d7956f79c9c62e562d88480f74c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:50:19Z), 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/DEPI82441185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a4745bce51b2e695b0a25c9fb60b4023c271bc41e54dc0de9652911bab55e2. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T03:26:24Z), 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/DEPI82441186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b410c388612529226c5788cc053b871702cc163b8686a91539a719518471bb. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEPI82441586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a56bd9158f8596d74c3c0e2d791d85e932f06e5e06b8d52ac5f808753e375a. 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/DEPI82441587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fe67ceed2ac8b122384e5da524ffa39e79ed87cecf08513ddadbb91fb86882. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:02:05Z), 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/DEPI82441588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a9fd22928173d20cb8d2a10e18aec58693532670a374910f750f3a2cba251e. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DEPI82441592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b87ddb59d028b494c3488ebe1efc4892ff1670109dc78124450fa81eec32d15. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DEPI82441591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7418bf1ce6322b2d958ef2e58f73f99ed12dd9406036734927cadfb4e7ae41a9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEPI82514420.