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 0xd2eab93710b00b5a05d0bda1bca09fdde509f2899aaf1dd67217cc7580339d18. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52c8462f-ccdb-44f5-92ef-ae63dc1135e5.json and https://artists.proofprofile.net/proofs/artist/52c8462f-ccdb-44f5-92ef-ae63dc1135e5.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 0x3ed11d940058539b90f31f89ea21ce5bdf1295cd16a832939a6705db00179723. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFK2552793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea542b8fd987d840160b2831d2a8c6c4a78ee63aef1f8dad9b0c5f3ec74e1947. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:31Z), 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/QZWFL2554659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797f7d0b33aa7e4222f9ea844a414a38d9f3aae76075491b95bc1d5c058be574. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFM2552490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fda99f1ed11ba40facd900edfebd5b18f9f5eb617c5f50bb92a5d2cf6976b7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFM2552478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e5cb0000849534bfb890569fcce4d801b3e50b387253f9dcb371f33bda71e4. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFN2587579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac595acdb0796ff3bca1d37574f5800dda1c5c650b36b978642bce3868e22c23. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFP2587029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518f2ac41538fbe4c7d8ac874f68cc6aac532478c62058eee5438624cb90589c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFQ2593774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5502399dc33b69533518b3ae6315601107504258213f6c47696aa1102081df54. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:47:33Z), 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/QZWFR2593808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b55693885f6f05995700c415f0aaf843e9f5d50ba62ac0dbdba7b1edaa9eda2. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:34:59Z), 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/QZWFR2593807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffd1ec3e2f814f727d2e2c2710a78a622c7fbdbeef73e0bb62f1271cf6a717c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFS2588403.