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 0xe6938b775ee58ca24278fedec9a62dd2f8cf63fa2a8d93bb0bb3095bdce2a1e8. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cad1695-1393-46b5-bf14-02b5cbd39dac.json and https://artists.proofprofile.net/proofs/artist/6cad1695-1393-46b5-bf14-02b5cbd39dac.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 0xa5aee91ddddef95075c5591a4514e89fa87fea324236c65c1610782f97b7d360. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/FR9W12360531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b49282692d1226d670879a385199ceefba7bc89f3d65e20ce72844e075cb68e. 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/FR9W12360532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1416108cd707af0190ecfad1a46aa8d43d1762354b4781321692ddba2f3a870. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/FR9W12360533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaab064585cf847685d6324a65489ab313f618ca4aca20e510ae32ffd9116326. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR9W12360534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dad7cefad7274616172ebe1fd120baa397552bce879ae4fd28eae63721dd40. 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/FR9W12360327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3eb5bd364a8c722ba348ec6a61b1608c80b2a62bfca43f7fed0fbd09b66970e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FR9W12360535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0927b72ca967dbd991a07c5e206a71dea203d6119759561b1ce7cf053195e9c9. 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/FR9W12360536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a709b3e4ba87564c95b1bc96ddd8c9e3c51e11b8457ff7b983db0b84a0769f4. 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/FR9W12360537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a52b9a8c0e24f8c50c3694d9f0aba25446d17bd0fbcc5645cf83d966fbad878. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FR9W12360538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f069bd2a3cc5452c077e46371b47a2938293177c587463988eba40ab600e718. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR9W12360539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b49282692d1226d670879a385199ceefba7bc89f3d65e20ce72844e075cb68e. 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/FR9W12360532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dad7cefad7274616172ebe1fd120baa397552bce879ae4fd28eae63721dd40. 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/FR9W12360327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8f96875380d96dce48d691fd9311df420dff81e84ba5cc542962670acb6fdd. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRDKW2108713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfccc0b16cac94bef4f1d36efb7dab337f4d43816470e7de09dae97eb67b0557. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRDKW2108776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5830343f5670607bded9756d882fbfd0d1e546b9690e6eb377077ce72d22de8b. 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/FRDKW2108775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f8843dcec5acddb6b836b9ef221901582b6bdd48332a8e2dbb282b5c23fc13. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRDKW2108774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1299ebcf1475f29a03358108fbb996a102f344d093f64043ca5d905757b5b02d. 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/FRDKW2106801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8f96875380d96dce48d691fd9311df420dff81e84ba5cc542962670acb6fdd. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/FRDKW2108713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1299ebcf1475f29a03358108fbb996a102f344d093f64043ca5d905757b5b02d. 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/FRDKW2106801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb9a111dfd1b3d99dc005bd33f5cd90950fb679ce0efec92e1b37d4b3bf983a. 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/FRDCX2004820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01699d2c78f32c6e5ed536753f7d2c9995e23a7dab5fb571d8d3f261547e293c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRDCX2004830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463e6f2cb589e8c6bf57361332490686ca84e1efe77873ef0d08e6f528be6f12. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRDCX2004840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4b19e8b79572c04fee7d22336c1febbb4e3638994f3465c0d107e309dc34fd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRDCX2004850.