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 0x4d83b0a197c59af4c2e7fdeccff5faf02d4f537a951f1880b4d7c69faa54e1a3. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbd24aaf-ea9a-4fbd-b517-036d2908c98c.json and https://artists.proofprofile.net/proofs/artist/bbd24aaf-ea9a-4fbd-b517-036d2908c98c.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 0xadab58a0b881133fa0986c1121f6df587e0bb03ff0870734e7d1e871a64f0aa8. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:54:14Z), 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/BBB622000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9540c94d411a053ae4319da661f6da15d10fa23375606e4b7f8923375b7688. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZMEN2032260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58d6c635c8c70975a1450fabaf5c9a89d90c21984d39a70b3d52361d8f1f4ad. 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/QZNWQ2270256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735eb54a823e1276068f7bb26aa0cda00b82a3e48a5e5c32bb691ad5be768107. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWQ2270257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a75ee2aa7f8c7e04a05627256987bc84f695defe1942348af9ffe5ee8e58227. 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/QZNWQ2270258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86da72a1a3d8de62b85e2f672e6d7eb36ad07c4c6fd538bb3dbb41d65c8e619d. 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/QZNWQ2270259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b0d6ccf486300a6b20f39ddb7db487f047f7babd07ff6f56531ac0ea3055ed. 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/QZNWQ2270261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df1f2d82bff101d1b04e49de4c69c2eedd8d13ec8cc0aa79541e6f5b1de9602. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZNWQ2270262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0030a99f1754e2a64da56bbf22d9640c3b88083dae7943747cc8e0f23826c7. 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/QZNWQ2270264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb67eae8126c88069d53b80eee02ca734e81d92e7035607b25e3599df30663e. 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/QZNWQ2270265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec89f9aa1a25ea6a43aa688609b5d5c5cc13131137a8c06b59601449b1ceb91f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWQ2270266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd538651c0a2dc2f591071526966d863f53a6c7909c2bc4b8b4c7778393e27fb2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWQ2270268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b97efd4dae149aa07e9a57f5ba4dcb0c986bc237e5975d841a34736b9703c20. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNWQ2270260.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deae94a8dcdd038ce3f95f8ce3915693abfcb923799eb89c41ea748d1395876. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZNWQ2270263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2795cec20d1533c466b35980352dc0e7cfc2e628d547441241d52fafce76b40c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZNWQ2270267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf055a984538d2fbf8c5b437c05d7efd43e20bb4f1158b7ef8fa9460cc4c1c2fe. 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/QZWFF2306808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b97afbb1dce80192966da94a322c29c0883979f9e23d6472f479a56855c545. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:56:32Z), 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/QZK6M2499983.