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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 0x39f50a8b2af0f7fe26c852bc94e86dc13a4f1569e3c148e0c0ea297ff37f9164. 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/eaad8c4c-f099-4223-bf9b-05e1938feb22.json and https://artists.proofprofile.net/proofs/artist/eaad8c4c-f099-4223-bf9b-05e1938feb22.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 0xbf6b6b8fad92537949036b58dc19bcd9846ce1ba5dec801a4a9fdbb1c1a1784d. 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/GBLV62006589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170998324d4544a40e2d762721088b3fb8d201fd7230d95ecb5a3c4d042dc1b6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2419633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8501a1eedc4c59ed1b12cb71a5c67a4dcb221908f085863b12efc646128ab31. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA2P2347521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd2e78431ccb01d9845f68356a10f98b7f90e25a19ae18cd021f908051d37eb. 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/GBKQU2312099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5774ff307d863420f828ddf3dce913e54ea22c01ce54064de63d76f7666ac8a5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKU932390080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf737ced63f1455911dc072cfe50dafd2c332b10e9462e003238af242d2dfe2a. 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/GBPWR2400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745ca2b432b53ca75856fbfb32a80cfe65f9dad2ec0efd77e09934d253248c81. 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/GBLV62321022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5fec3fa60a9d87c291c21271fecd3bb15c0462ec48959ba789e687224b7cf4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P1925564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08fc8ed66a115aabe0ca3c4a2da0708d5a9c0146b6d01878d34ab8fc5622436. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBKQU2017798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491099187ea507d7537040872f51379048f214ed79d039b5901a1a0a29ce960a. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USA2P1944921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cd8f185e946f70972974394dc3f639d9279e9b9f7b2550d94b852fdc541325. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2041228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585fb4ec7440b56de7624f5a18d0addba1032fe2f6dca295f75326196e918f08. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/GBKQU2017797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d46f5f43e60cb4e78e093663ad5c716aa9ef6a4f46fa63faa2f7c135dc8af4. 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/USA2P1944919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344f47f6895f4a17ed756851ccd278e1ee38712807018cd24b4d0e192a75e323. 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/GBKQU2012236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71819130a4e4524c9e014ed880c64f6c5a4e75c75e086c2480f419ee02123b5d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2041703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f167624fb15c645dde4e3a6f2b9a8c2d17ffe44ab68ed74cdc431931b885373. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/USA2P1925563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1459f427fc1b418413e83ca16748a9d0fff2573faa44858c7857e2211d65cdc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P1944918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4265fd8ae0348afbeba069b0796305ced61872e968509fe71dd8c279973c8a7. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USA2P1925565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a45b33033d0d18e3b7e579a3726279279fd53393722965e82bdbba24c937853. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USA2P1922790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5351c66d370c43863d01581964d687798b24e7554674682cbed0c116108c9f. 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/USA2P1944920.