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 0xff0da2e45c2903a17cf329902bef9766e4eda31bf0bbad6f06ddc93b3aaaec57. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/472d78c5-af6f-4354-992e-e48a0ec30271.json and https://artists.proofprofile.net/proofs/artist/472d78c5-af6f-4354-992e-e48a0ec30271.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 0xf935769b7802606d076e6e23559f66ec5f6fd9a99fab61ec9779e301a10bf3b5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZRP52531484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f71f7a1576e174dcef7fdb8d340774c5a27d340b07ce735eede2916c105dcd8. 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/QZNWT2097734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5a928bbbecb230184010c222cf56ddb83583574a333ada0a7cc3ae1287f10f. 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/QZHNC2249321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f71f7a1576e174dcef7fdb8d340774c5a27d340b07ce735eede2916c105dcd8. 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/QZNWT2097734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fb2acc1ca5c9b915d67a4f57108f7f29c743205ff34c1db034efc5a095ea0d. 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/QZK6N2011631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c916d0c32160baeb2b6bfd83a9a86a097e040b359be218892532a7af45f4675. 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/QZTAT2451928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28224525c9b29ea9e735d095310be5ec3198eead7f4ca64cbf2b374541255cbb. 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/QZTAT2451929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31391c1f7e3341eaad2789905213f9f38e5e48501df50a6543342df8880a920. 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/QZTAT2451930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbe98a896443fcde26bcf15b6777efd5e0e3d9f4ebf0e284d52388780d5c934. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAT2451931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589515e97e798d97f3ef8b3ee7efb421a70f0a6c35374a923ca69a3b3f3ab47c. 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/QZTAT2451932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fdbca886d1fed4e5f1722e4034d1e87b48ac6b4c4a3171a8842d1e378c0294. 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/QZTAT2451933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2fa83229d0da04fecb972a7268d9cd441edeb2a47c4983eb3e50243ed872d2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAT2451934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2f034f23fb5c1689052d1524248553d1389b508ac5221ef0eea6c9277c803f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTAT2451935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b230f5c8bfea303be316f0543a425822a1a8e6caf8b5be0fea4f9373a73a06. 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/QZTAT2451936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820c4ab05b091a407f56726195a10e84fe1645f12148028d9fc41817e94ae962. 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/QZTAT2451937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62b8659067057346330b84f2e562b714b2e5c6cd86452cb213fa2f9def415e4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAT2451938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b383747d98dce5e3ff66fc420b9ee269314cf8aee7e7943e188184772e57796. 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/QZTAT2451939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0246dafe1bf159b6365011d17bec5291151716d57b638fab48456df3464222cd. 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/QZWFF2447178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2359aed6333221fd603d065bee2cfd5f4872e563bb9d08673f66f075f1ad3724. 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/QZTAX2386954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ee62668a11bce87567b12cbcc43166a97b7cd980fe913fb6f29a676361d0d9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA52290313.