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 0x1052ccda37105dfe0654ca81032c3b7acb747cfc9108eb69594c3f9172f2bc8e. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/804202c0-8360-4af7-9dbe-e28fc4686dce.json and https://artists.proofprofile.net/proofs/artist/804202c0-8360-4af7-9dbe-e28fc4686dce.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 0x40befb07fb39627ba15c37ca1bba252faaf797d5cb71413245c7d0c95c689b06. 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/QM5LC2200342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f31ed8f094101f101f6cb7f172c323e56e45f71cd2de127fc7c06eb90828ea. 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/QZHCR2100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa586dc11de212d90472937a9b22c57b3575b463944be341108c711c4a626f8d3. 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/QZHCR2100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5449d8971931dc1fbfff6510214375065b7b76d63f56b5a114d9b895c3ed26. 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/QZHCR2100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f353610daaae40d97f5fa4956d8c55f52f34d7c5fcd48ea4db0e364f0d983d0. 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/QZHCR2100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bb6fdb2ea18ea59651acb7de20d0f98a66fe48c21838223e122fb340a95369. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHCR2100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e7716732f10c50a66de75509459e47665771e721e91d8c4e8853d77a03dff4. 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/QZHCR2100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef9494f859a6976cec52e292391c900b2fc86e21e79affb5d99d8ac6075c3b. 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/QZHCR2100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd42bf567e4164de9071beab092b9eb5dfa643e19382131f4fae9b637cdecb7. 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/QZHCR2100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd289d084a8b7e3629c47dba9a41a3ed79a1d482611089dc588b0a5d0a4a3f7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHCR2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747eeda7595fb9908974e8aea5939a4f53f0e6a3be49e6783ec7441558da7e95. 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/QZHCR2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8114a94f61b80b5e16358ac51488537adce209e30eadc9fca25549041074987a. 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/QZHCR2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f286e1f513ff23c2a89f462779c74b0590817251090c1b47728dbf09f6c3d4d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHCR2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea5f93df31d096e3cb683d46e5508a5043998cb3257a5e2fd1da5aa37390e51. 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/QZHCR2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d620a191a35bf0b2a2297ce6f55255668d96f9ef68943d888db095f2882159. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHCR2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6698fbc071de9a616df9946be7914359d629ba2b120fb9bcd247ec6d46b431. 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/QZHCR2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1206224b632594560ddcf41a9958a42cce19eb44cea5587aa934ca437155bb. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/QZHCR2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f491fac60aba82cc9e6192ed07817c9e09b572b09313cc2692ee008bbd08ca0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHCR2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd289d084a8b7e3629c47dba9a41a3ed79a1d482611089dc588b0a5d0a4a3f7. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZHCR2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae51717d7670b4684fedba1863021abce8c37cc91e998635ac51c62ae6fc7d97. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZHCR2000017.