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 0x8fe7d74fc8e29274a422b370ec401e1bc230c5cd415f097978ef4d4d9cc0b114. 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/70553c08-b741-4539-ba73-51cf835aff3f.json and https://artists.proofprofile.net/proofs/artist/70553c08-b741-4539-ba73-51cf835aff3f.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 0xc619e556ea84be5f2aadeb742e827f29296f1ae44796ac041d360534d2b9f642. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZRP52264005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d962d142c4dd1b58de2a49ed4ebfb348d354f0d7b307c835ade4087b714298. 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/QZRP42334103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fbae45c94976e086b4fcab5546f47b65709a67a6cfee6f203bbaf7804246ed. 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/QZHNB2462326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3c792eb20db87e399c9d224900f8027a6e9ce2644575f7572cde5b1ebaea44. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZFYZ2522094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f68286162d0053147130c0759fa46a05306531bfd64856b76315227d055ea96. 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/QZFZ72559546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656712e1e36bbfbc64afc9e99562b12a0f435ad53f59e7f09eb9e968890f4fdb. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:46:00Z), 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/QZFZ72559547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04426a21cf72f48e046f96bbee8b29fa92284b2e417ec562925076a381f2bcdc. 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/QZFZ72559548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53888142bf3dd36dbb414cdac1d90cc06b383cdad3b41cb6b76f9f09744b443. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:18:50Z), 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/QZFZ72559549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b0eb91b1932509be0958aecdeb5478032b982f0c3d78b14ac1ff19eabce3e0. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZFZ72559550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645624d31bdf00b3e3c24c1d5d7ad52dd52a0ebb49957a00078e0e99c7801ed0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ72559551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d29c343da95d2ef085e2fd46f51ff33c941d463a6a12d046050972595cd9f2e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZFZ72559552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a8e5e99ebc63d8ec5394d5a7334f7741fbf62a168c12c62761094b328bbaee. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:00:49Z), 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/QZHN32545402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f7627ade1843e044f48099e79c6c7f4c1084b015d9612fec7e3db301703b5f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6K2581896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041c12b0b92617a3809b2a87fca29fa3e95c838c5202bfe10d69090ecbb8ad8e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZK6K2581900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d62a3638a9088bcf5df66532be0311aeb8cc0854b4cc3a53a42f9c0e12fdcf. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZNWR2514588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b79e9affe3e262f17c11a54eb923507738ddefb43362142ab0c1cdd2fba79c5. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTB82528579.