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 0x7bb0de184cc932f7b6b30814671d8d4f1b20e8a51f76f841482ef82d94dec097. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9faa0f39-9585-4055-ace6-2eefa960c3fd.json and https://artists.proofprofile.net/proofs/artist/9faa0f39-9585-4055-ace6-2eefa960c3fd.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 0x8db16f9997d4ddfd07c2337a0460e7dd9cad5e9e8080806724401cb1b99cc666. 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/USJ3V1385272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8724ac31230143b1ce8056378dbe40c2ea996bfceea847c4f7093daffb20529d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6DC1892643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9d7cea7b8233daf97359a360b8a97dffd87e09fc86d1748d7ddc2ce5f64df2. 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/QM6DC1892652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fbf5a75be69694c72ad04298793f35db7beb59d4dafad4807373f146badd83. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6DC1892655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2809bf9237c59f0160d5123a7a2fa1074e8b0147b495aa3331460b63b4132b62. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:21:44Z), 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/QZNFJ2206326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682bb7d959cd354dda0c8ce858170045660c308222307399cb91832c66520f83. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNFJ2206327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6aa92e72c95dd8a5b4a76387b4deef5486569513ad231c4154b8f80f6588f03. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNFJ2206595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d620a3f9f4deb105e1abd96c8c9e4fe4902ee7ed611d5a1dc1731ccfe07e2f1. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZNFJ2206598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53abfb212953ed985620972c6a49b182e4133fbbee843c6dd7f8370bea0b9e5. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QZNFJ2206601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338198a8ad0199e2f242d3bc9072056954f868147ef992392e94093c5eb4d692. 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/QZNFJ2206605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd32a1a1e70a614ebdb51d4c34c10cca3d1fe4692769e4c4e08342a746b266f2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZNFJ2206611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b3654c39cdc51c433ab4e291fb145e239a83e98f7553ebd27716c84311f7f4. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:01:09Z), 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/QZNFJ2206613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77694bed503b277e187d674479163042b01bb19a8c6271e74fe45254b9e942d5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNFJ2206616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4aae5afe7d15458d1c1256a645acaa49b5f8d1e88847e777385399dce0fbfc4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNFJ2206680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91035f0821579614e4bd8ee0e5e90c4206cdb91f75fcfe42cd57861b79388091. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNFJ2206687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5219a36f020187c26db3161aaeb617a47cd2d8854a8e8b8521832a531c078db3. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZNFJ2306470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4904efbb3f21111baecfa27be6713d3e9a8dd38b027cf20fbac7f6aa6ec0117. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNFJ2306471.