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 0x05fbb77949254f0201cb76c3a65aff9116c05ac90337127ed333648e94b05e44. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6214923-b706-4840-860e-050a898dde14.json and https://artists.proofprofile.net/proofs/artist/b6214923-b706-4840-860e-050a898dde14.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 0x1fddd5c49d0e7b40538a35df2cfc7eb70fbfb5b636a3cae5f302d6ca059df54f. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DENQ82200198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f78bcbd0fefb7a461e63e62cb2464bb8ec9099e1bc25ebc6e76003093b727e0. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DENQ82200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a8ef50d3386ff7d109ae8e60bf109367a4d558eef14c593bd31d7ae07d6e77. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DENQ82200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ff1449c3cbd08290dc21c98a399331ca306ee2af29ab4af001f109473b1036. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/DENQ82200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c610ca897241155ee1478a8b827c71d412932247bb4e8bdbe57035850c3a72. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DENQ82200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c91634e6e497f6ef0c47270133268df30d396991913f0aa2112d6600311313. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DENQ82200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcb4cb708f82749cb006bbd8395020934837e0abd15fb3ffa048f5a3283207f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DENQ82200206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cef1384ae74811de7c3a8c4ad04286fc35a207e410dc0df8e01f5e06d26d3b8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEKL21800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2677bfd6ed1657f3b10b50ac8b1b0f51a3f250055dd77041f7de56c858f012dd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEKL21800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67c68e2bcd2130245dde6ee96bc2be4bf8e451af03fca0f7ef698eab5af2e2b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEKL21800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca27e873fd9de3f6a3fb3500c9bcc74142dae366f4f71f1c2a8bc6ec819578a9. 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/LU4MD2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42f616b3cae69cf1c8e34c95b2c1065096fecbc1471dc9411f7a1e9a1a40ec5. 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/LU4MD2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ff1449c3cbd08290dc21c98a399331ca306ee2af29ab4af001f109473b1036. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DENQ82200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fddd5c49d0e7b40538a35df2cfc7eb70fbfb5b636a3cae5f302d6ca059df54f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DENQ82200198.
Ketchup on my own Knees (Hungry for More)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db29c8959acdd2cbdcf6400e08671bb1287b3521de6902eb7eef717b55f36fd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEKL22000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecabaa5ea40b6f1242f68bc1638aebfd1258458ffd155b159a2c18d46c496a5. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/USDY41628846.