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 0xe7bed8f93e6be48a7a460f673e6536ecd95de22f871c15a56e1d1fda94b9fe8a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd7a9077-5393-4a65-be65-a2d447e420ae.json and https://artists.proofprofile.net/proofs/artist/bd7a9077-5393-4a65-be65-a2d447e420ae.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 0x7e9a9e36ee9abc003208fa4ca8641ace5d44c9a48c2828afd15ac6996a1fc7a4. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:11:14Z), 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/QZNWX2166294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c8c7980e860fa547322399bcb0e7c7f53b105abccd0298e7600baaf2c4ae77. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZNWX2169224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f10cf618903f48734700300a1c0f2ca0082877219ff86242a347987cd05a41. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:39:12Z), 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/QZES52258093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bcd984c8c277e9994fc3821b0974667235ccdac5974e377654776dfc21fecd. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:47:10Z), 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/QZES52258101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279bd41dcc4306bf29820216e94bf23b6881cd67b46b3373a5443b44dcee46bf. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZES72267012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8033f89c576fab5877cd39eb4f7481f346b34d5d4d346c4c561d66ccab6bd83b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:04:55Z), 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/QZNWT2212525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b9f7806daeac26b9b6f5dbb24e874092f6c0ecc25842bba5f6fb2acd9ba477. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZNWT2212527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc67d3aaa0a9db1f3d99fb078c1d8788699d352adc860139f784a0ebe9810b7. 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/QZNWT2212529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca244196754b7a8d0777dae2416d0a939f26abe6e5df697fa1b6cc07e201f386. 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/QZNWT2212533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5531d30f98421c03bc23bbd93f0f30a4f9308af6884d742c6eaf733c07b7ab38. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES62417200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c0e1b75a4847a74ec9fc7d194ea9987aca515eb3effb453815e2be436814ed. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:06:47Z), 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/QZMEN2448068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c74ef60b7253718713aacbf0cc0a172883bb7aa64e49f57c19f22481d4a40b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFJ2556329.