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 0x232001484213d0c87c81eb1a752d99883e670dd10fb69375fe2a56c9eb029364. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/833543ee-a3ea-4434-bea6-eadf206981e1.json and https://artists.proofprofile.net/proofs/artist/833543ee-a3ea-4434-bea6-eadf206981e1.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 0x156f86b3114f5b134345b98e1fe68c6bab56627bb3c0c2bd4efdd9e9c09bbe1e. 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/INE182449129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fda24c899c960f9eb9d0d4491d7f0b30f9ed8123c9d927c0300321ece61fecd. 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/INE182449128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32dc8fac29498f9eca17e10c692d7fca022861cbcf9705b84f8b92061edec97. 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/INE182444167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97ef0420e839172b826878831905ab79b20144970f2dd5b795718bdec3f20d6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INE182443964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad89c00dcf12ff084a978ce21f858ba8b95c8759110a9661f610f48739e338f. 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/INE182442032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725f1c60aeedbb63d2d5e87ceecd296da4db3feb243cada8abc21d310f721103. 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/INE182436837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840deb0a53dced9a7e04f7c78e18360eaf30ced8c8eefd706208cfcaa3923e75. 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/INE182436828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435b79663828bc2f2da58e37bc84a63694f87fc6d850db50f0526b0ed3b38994. 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/INE182436834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc74ff69da306d27bdfa48e58df57d51abdf964884e96c31d89afee7be8d23e. 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/INE182436831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29af1c22b9ccdaefcd4109a2ad6cf624998919ea861c320131cade9c8dd54457. 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/INE182436839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10effbc353cbbfc050856e87f8686dc8c4e76c2e8afe89943afd2c2d8ebd1d42. 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/INE182327673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17940b516dbce4df3730c05960b54be3f5c0310110157e3960386d602fc71a26. 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/INE182327591.