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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec3b7261f828d436533eaa78865a59d7b266d11e6d7255dfed158e87e788727. 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/f1d9f0f1-2063-4106-8ba2-52cf083c829a.json and https://artists.proofprofile.net/proofs/artist/f1d9f0f1-2063-4106-8ba2-52cf083c829a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc1aff307d474332fb2380869dd1ef9a619e71fb4b2fe251428d89692f1cd83. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMHN2391462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a170dcbf7be427d96e747ee800fc626eb33323f130d368ab2efe2af027eb990. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NL8MH2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a170dcbf7be427d96e747ee800fc626eb33323f130d368ab2efe2af027eb990. 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/NL8MH2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21ccd2804822b496f99e9d42d6122a3ea03b932f18204017463f1dcdfb5c46d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBRKQ2455151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317dc3897b8212fd43ea3c77809afa216b02c762cdcdfeb44974fb4c0550d65f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTV32448947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f35568c6baed63e15597b8a886238233f252aee076a866c052f5c7aef8c9d8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWDD2487823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be7252406477395fe156a51ddb8c0f661d0e6bbb6a671c70ccf6dfb97819bba. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWDE2482883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec80bdfeffd04c8e4e15875645a82685b732a5fd7d058584f759a544bc2b959a. 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/QZZ8A2430964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21ccd2804822b496f99e9d42d6122a3ea03b932f18204017463f1dcdfb5c46d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBRKQ2455151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530d18a4bf96ae5e05d3efb50ebbd6003e2f8a52b72ec02f69cc2fba7f4ad6b2. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GBWUL2489465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be0be80a579d41a7b7b16821d0d5fa45636354eed8865c0fb207af714485143. 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/QZZ8A2408091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be7252406477395fe156a51ddb8c0f661d0e6bbb6a671c70ccf6dfb97819bba. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZWDE2482883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cddfacbbbb4e38ad125423a6d5d145817433d4bd0ea8270acead02f8d3d128. 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/QZZ8A2430994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcae5831ddf42ac5464a87c02569d5e32ea68811cb1442319672cb1bf4a56a75. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:56:42Z), 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/ATJL72500001.