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 0x72f605e23be2292a9e8779835a9310c42c775c54b449d55a3cb5b491e74803a8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc8c10fa-99d4-4917-a5ae-ee0e94537be3.json and https://artists.proofprofile.net/proofs/artist/cc8c10fa-99d4-4917-a5ae-ee0e94537be3.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 0x563200909e629e29063e48e3fcad1fba22f6fc226b0a33fd1116f17f1ab255ff. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM24S2107336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc758e9745e9ca5f1ff11f1d48bbdc2278a1e0d5679f240a4c61b98aa23133f00. 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/QZES62253407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599947d105cce21ac6921a3cc359c297513f9505eb05e95a42626cf2393267cd. 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/QZES62253408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aec07cfdbe944a5ffb3f5d64e6d0e5c24445e92a24a83e3270ef1e485a4698d. 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/QZHN42159908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdebd8c81a3fdfc4d6c526a0be7d67a9884b43e7b1d11d39e579194f51764b3. 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/QZES62253409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf188785299e022900c2b6f34ca24027f79af11e235565c9d960a28ca97bd4b71. 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/QZES62253410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb051c1d80fd1dba69bd411a1a5219ed2e2c609568750a53256a8d648616ad4. 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/QZK6J2185753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563200909e629e29063e48e3fcad1fba22f6fc226b0a33fd1116f17f1ab255ff. 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/QM24S2107336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125b26d8477c47a03f82668797c9883cb00acedada75a3502a750ea773d50fa8. 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/QZES62253411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34c386004b4408b32355629bb6135c023e9e9ab54914d4e3bf9f5534b6e55e1. 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/QMFME2360213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3fc564b2a9c13ff63505aec54c25fe7679818148a62b8d68fd57b131f3fd76. 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/QZ9452300236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3d2bdc2870d5929c4c63e6cd8d214f7a55867aac0ca4a029497abed7d7fe41. 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/QZTAU2268903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69367227ec35ae69a93494bef4b4f51ac3042d1ee020d380ec48e5e447b88d50. 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/QZMEM2296333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0a1e3417fee72c53eb25ad6b3fa9631682ca78a91ebb11f59504f37d98000c. 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/QZMEM2296334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e08ddccf725b6c724dbdcf504ee93537beb77110e8290fd1f15480dd809a53. 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/QZMEM2296335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b5d16ca283562abd543442408a6bbf7b483bf49c5f90b7cabea538ad7e124c. 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/QZMEM2296336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8ffda2e40fae9b4e835cfbe7c5d336fb5187f1d32f4b6fa7cf96c9f2b72961. 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/QZHNC2288608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8840c0e47c52e54ef0e3093033cff9f4223dbee16b3f9eab95ac18194cb5e1d2. 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/QZMEQ2096745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdf4f80baeb6171d4e18e27fc5cf3d7f76ee2f7c71849632d21b63d52014eec. 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/QZNWY2032970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7432f36b361cfe84860eca094471cf4540611c15f17de6019b1d8c200b1c72fe. 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/QZMEM2034935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ffa48c9e4c5bf209f8818450cd2214438be1b010cd3969322023a4e8d94e2b. 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/QZK6J2099324.