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 0xc6edfd44ab182a52202b065530c5dfaf0619cb65c7694bfec0c63eabfad2850e. 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/80b359bc-1c59-452b-b2bc-f20f3c58f0a6.json and https://artists.proofprofile.net/proofs/artist/80b359bc-1c59-452b-b2bc-f20f3c58f0a6.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 0x52be820818ed8e7d984c4306fd6bab63737aaf963cab5312a0b1f49c6ceddf22. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PLC592100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd922346839352d4208d327f276d95584b095c58c18e9b22bf21f1b6bb3848069. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/PLC592100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1a8cbd53ed3c8436944d455f4480270d0e1bcbdca11294c7f33ba1576f239f. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/PLC592100169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb6a1d95ace28d147fabdc960e775488f555be9c51fef445eb5a30b74a0f6b6. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:55:04Z), 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/PLC592100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f053a1b7cc14ed4920aa41a2193f5ab960114941778bb91c6a4d0eb97ca69e6. 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/PLA552100610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5518d7f522402298cfbc67af38fd013d85f3029f6cbce659a00a4755565e344f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLI292000131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4374ebb56306dd1aa2f0fd813d20c9f1857fa801ced71e275335833f40d820. 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/PLA552000471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe281eaf31b1d89ba511d9e9b3da604a2139ae9552aec176cf4e9bd67010d389. 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/PLA552000322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aefbf22350860485c2f4703c4c29fa909068b9b25a2a20d9300edc267c5a8e0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLB382300430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed87bd297fee92a92e804e8678835148a5bea9435cadca73ac59fdb3fd16023c. 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/PLV401700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae50c016c995ce125ed9db1269cdaacca7add32b7001261e9b4e9ef69975102. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLC071506013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019d04013ad33eeab6c863029d2949820e9e6de97625f53298dda2df607961ef. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLA681802233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0723299b5f9a81bf3a2da4939db9e8512a94c5d67c2feca8f6b0e4538c76f29b. 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/PLA681602048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d4d566a5c720e16bdb780ddb027d322514e6a573f92a009235d09a93a15adc. 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/PLA681501703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ba28fc9c3d4a5881130ce34b370fbd507fa4d243cdc58e7111679fb7068156. 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/PL2DY2302586.