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 0x2873f5df853b9501274303c61c205c5435b6d45bffd76e51db183787b480a24c. 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/8e4fe4b8-c20c-4c2a-a9a2-8da0aaefe5b8.json and https://artists.proofprofile.net/proofs/artist/8e4fe4b8-c20c-4c2a-a9a2-8da0aaefe5b8.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 0x0e848407fbea9f12625692789ad5db069f8e391c2a568ee41a900e30bba75bc8. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:19:10Z), 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/QZES82418637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867951b850b130f4e229b3a0856e1eb69244f42dbde51c7debe461a1c73b4968. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZK6P2453168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c1fb05c363852dafb67c9613832468f0d803d7ce8af20c702956c0d767919c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6F2478627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ec106992895cfc1bd1d1dfe162cafa4da56637bfcaa15b2b322c53092e40ed. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZMER2407946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6204b8489567c3bcd60bc373c819f6df38bd7f270b6f67685248ad228d61e12c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZRP42430164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23867918bb13e4a7a4964ea4072a782af331fd2b91d1ba2339702d8bcb4bef9. 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/QZTAZ2458875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592787f1676cffff514a8df60ea8fcb346cbe690899b185ef7d9145b00d5cfdd. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:09:06Z), 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/QZTB32478341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8360bb773e20bfc98fc715291468768c45805cb7ecc4852faafd43ebc00f71d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTBF2424745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7827fec0954c7abae907aba8fd99224f2d9a2208d5e7de8a5d49b6161c1b90cc. 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/QZWFK2454564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eae92b709072e2baa463ba1d15b96d8b1542f03b466d462e4df6473ac725a1d. 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/QZWFN2438965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fa38693b300766b5f7c6437e0ec57f66d85d35b98c82b05aea533aafe9d63b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFS2489126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077c5c3c002d6cf1f66b9a19dd778f22063c9bb6b14077584c12bef3297faf74. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:11:21Z), 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/QZZ7P2440702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a39a4a4cc6dbfd065696b3b875b68cc05a5262ace0c940cab7da651885446a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:22:44Z), 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/QT3F42426316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85954214ad25c8ce8ee65b24e8c6758d81fcea05f4fd05f4588e12c75448fe04. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHN82520532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75665e28a2525d2709b9e1bd5679ac6e1f47519ec9e4e5011e01dfb9b4ab6550. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6F2584289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221667df053857dd8f161419301ad1af44ada55d6916c83f62f693d543dea9b2. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:54:41Z), 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/QZTAT2528673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8ebd02c7ca3d76268e5cf9cae26119fb7fc5a1dac42a2d28961ffc7959a54c. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTBA2506092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2daff70d3837e0fc188ee59d11787d9a8b8f28f6b1e5c0f582bc402cd0afa5b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7Q2555738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763ece294040ee612a031df40e492a3211551492e6a23b243fedbac000fe3f14. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QT6E52500475.