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 0x63ca998201fa876c4d005e9b319a68a53c4cf16eb14b6c0a91e75770b74a2968. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3e732f8-1986-4636-ab21-f7ec4f238359.json and https://artists.proofprofile.net/proofs/artist/e3e732f8-1986-4636-ab21-f7ec4f238359.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 0x732daff5cf86fbda4987e61828ca9e8dc55cf02a36685fe7a6a3aa8db1608525. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:20:00Z), 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/QZGLM2377161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0efff69c5bfe75be21cc9ac5d52bbd1779f09c49b93a69f529afa9680d25d9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZNJV2332334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5b0df9dcd15fc3c6d6641e07b8737b6d408d910667dfd7a7aaf7e0583040d2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNJY2300713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c97c725552fe3af19a70d2234d494bd299ebec7cb231f5a33091eef80ffd9c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZGLS2486689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59945fc77cbf9f8fd5fc000e0c5b0a7871149f74fbd190dc8e868a1c46c2f7ee. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:06Z), 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/QZMZ92473269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb3b268381272a02f3adbd6b44ae32ed27a49fc3db2e2d971c8e7d688f25842. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZTPX2494230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4571298f013d03dede19c363560ff4a1d07719f3d1504162f04405f45a79fbda. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:10Z), 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/QZTVM2417673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bcc3cbe92d01b4295460092b3c79cceb797753e533af28d73dbc7ec508547a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZGLM2541267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a080b4e5b921bfe75f8f2f056e82f8708951adf2b7ee5ba9b659e0e001c1938. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:33:19Z), 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/QZGLM2566465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb433bc9bc2366c1bc7e987865c1e09dc65bae8da0aab082c31dc9bb751908954. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:37:23Z), 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/QZGLM2575821.