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 0x83589f5ae3843449b2ce7c24facfa67c2480d5fd8cbc516e2aba81b960b93b12. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/861bcf4e-fedf-4b2e-ba81-1a52092fb438.json and https://artists.proofprofile.net/proofs/artist/861bcf4e-fedf-4b2e-ba81-1a52092fb438.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 0xc02ae77d76026a2254d60ad52aa53cb315894fbe4e89e6dbefd102c3929c3b2d. 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/SE5LG1600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbf727d6bf52ecd612ee56a7cccf5962eb267b28d2ab8c0ce5fb365bc987bbf. 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/DETB31345062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc834dda9fd55774a77a6fb24b088615378bed9ef4a9e40e71df4a2738279c779. 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/SEUM71400534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47da882cf9d39e1d476c3baea1d2b85134d16813400f20eeb886306dbfe3e3c. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/SEUM71400533.
Younger - Dimitri Vangelis & Wyman Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf88005d709793ba305240d8c704cbbf36e956af4a059182ff9f63a67eab13c. 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/SEUM71500932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1f3d7677d72e31401e2f70d8f9dde976a5bcabb4dbfea67ed231bc16278923. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SEUM71500933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec00f244d4da56bbd810bde24594943f8b28ddaf0f79b74b630bebd407d22591. 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/SEUM71500934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7696663832a525bfd2056b690bb2c6440d74365bd5ac56932be2bb27b6751c5b. 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/DEVH21800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543561ed22a298b29b68f9d7db2bda31c56527b2a1b1e819f761a7d981156ff0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEVH21800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e078485d86e2b0411d19d3d418c88be99feb0be055f601a4caaef916f6bb1c. 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/DEVH21800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b747781a8fefad0103644c5b34962cb4c74876c3fc2ae6e3ecf0274c5c71ac8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEVH21800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe47f2f4af6be939b4c674139013d6957ce7b2b7ae84ef984e1f5c13d0457839. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEVH21800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c73df244e4e7284e1a2c91036a914733aa88308d142e3296d3eaa17557ae74. 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/DEVH21800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830c33522766061b77234292da4a3ef46ab7c7df95bf0abaf221dd2b72ce2d43. 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/DEVH21800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254b8ccd7c6a5d08aad98cb917e4dd3ed536e637318dc0002a00336f2ccf2be0. 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/QMJYS1500294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98266d03b3391d7f24e573e5ffa0f09416cbd3899cf8ac7ff75110712f7474e5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QMJYS1500296.