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 0x947d20d3a4278ef6bcb28d5723f8f5343040e8a7458bfa541c150bb68eefca50. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a988d112-f77f-414b-9c71-0481e303ae99.json and https://artists.proofprofile.net/proofs/artist/a988d112-f77f-414b-9c71-0481e303ae99.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 0xf26d6f822fa609de48fac7ba25243045b3b6c01d231e4b5afd644c18ff8ff323. 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/PLA812100185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf562e971cfc2d8d87a4e94a5c8bd0edd6abd18e88717343065d3984ac36f35e9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:06:45Z), 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/PLA812200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5997c181f6284b5542289babc926eaea66e8e89800a7a0a1068e87fc00b25a. 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/PLA812200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b28a935bc89fe68bc4082a53c2abd4fd4fb4cb8a68ec08ee653eb77aeeca9d2. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:54:50Z), 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/PLA812200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477fb0050ea9a5b670e92f69d6b07d6c84319089b8dc9bd0f351d7e43e86f213. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLA812200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa86615d2bc4a0ab548da5fb327f9ce32ae21af5a8a14f661e1ef2d328e9c08a. 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/PLA812200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31095aa004eef4b56e711c4857d31fc50aeb78cdd939467f10741caef1620f78. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/PLA812200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea4c5fe8db17273003761d332a86955f84f616592c802b70a8c5d3b5148a411. 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/PLA812200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0106578f15264ce24d0665919c487396142c9c0047fe2939b3ddfd222d67f7bc. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:02:06Z), 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/PLA812200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c12138d07390cbbd4b386f61176edeca9980824bc2cd9b70e66f95dcce14b8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PLA812400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ca9d22e9f9ebdca0572ac03cae7ce05fc640cd98e3dec0c1b8bcddfcdbd8c9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PLA812400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ca9d22e9f9ebdca0572ac03cae7ce05fc640cd98e3dec0c1b8bcddfcdbd8c9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLA812400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53496ce2c0918d215ab877afe17ef690530eaf701c078a730c90149c80f1f2f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:54Z), 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/PLA812400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679ef6cd6e037f6b9300c9744668ca269a95b70aed8e8288393f17f22c965d03. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLA812400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09c971431ab10fc778040440a0f84f8f4931c8bce4aefcae61339f9446b2f8b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLA812400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedd481ee76f6b0b4b87b0f91f7fd0387554a9b9de09cc58e2648b0f262aab3e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PLA812400072.