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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3080392fff2dbf340144727f2205bc44eb09ccc4c21189d6a3febaef1d1bf83b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ff5a250-fdfb-413e-8ba4-55360ea86c87.json and https://artists.proofprofile.net/proofs/artist/3ff5a250-fdfb-413e-8ba4-55360ea86c87.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddd1fba55207c50bc24976b250d184906cf4efa217fe5bd86aa9119275a900c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USI4R0611826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e986db7c2184ef38c3063d9d88c5ee6e70ab9aab5a034645f3fb7a492c9ac7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USI4R0611827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25c1cdce5ab7d2bdd012b3c767858885c33f0ca37b0b729ce8a1a071eb9f218. 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/USI4R0611828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966631e69420acd9b017722c7a4f8501fbec3693d04bb723fd267c640b6de19c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USI4R0611830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd91938d8cfa8c56b9c0ce04b8d756ccda103e203ad1daa6acee3997a6c2937c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USI4R0611831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa818534033500f3be11fc60f46d614c8229a5bfccb7aa1b9d94fc7f461078966. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USI4R0700349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4775ed109319f45d9c1ca42cf4ec1f1a4fddfe2a27b41fccab0222a8dec4fe09. 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/USI4R0700354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9a83188386d70710246daceb0c68864559cee133bbbf8187ba5be01cbff9ca. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USI4R0700356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f2a95ad40b0b462cf9b03febae82ed423f7b07208e0a26ef7d8b609abdf791. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:43:15Z), 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/USI4R0700337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad120ad92e6d2533eb9709fe607c8abfee09ad2c496191e592e0b358f086de00. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:29:03Z), 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/USI4R0700339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cc7c3a3a2a7310fe2217f86e7cd9503c03dbd2c6f23cd824c3181770a38d64. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USI4R0700341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7546bfad7ac3b1eb1a72421d2b012d5f675dbe83ac12ee558eca2c86ecbc45. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USI4R0700342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae9e6339e99ee94f003862c3eb0965de686266fb953b555c97705fe074fc01c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:58:33Z), 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/USI4R0700345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71053d68656383ff84db5c7001f9e3b63ce08c9f34ecf7ddfa43074ac1b3fed. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/USI4R0700329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed9debd655cdfbd11a4e693f039c4b9c3a296d0381b6e91e7ad0b47ad780570. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USI4R0700330.
Gothic Vampires from Hell & Covered in Goth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80559e0f7537d849f683c7e9cb6406ec656685adb7561b3b0f9411800471de5. 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/USA370962957.