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 0xf6d9fcc076fc7edf24ecdda66c2d9a6df0a1f99fbc7bf3155e1890942fab99b5. 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/610abd56-d21e-41ff-b973-f0ff63f279fa.json and https://artists.proofprofile.net/proofs/artist/610abd56-d21e-41ff-b973-f0ff63f279fa.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 0x6d4fb254465b5836500f06f1cc43e18ff5f53f8d4e480f3b8eb7a6b3b15ccceb. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZN882128497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4fb254465b5836500f06f1cc43e18ff5f53f8d4e480f3b8eb7a6b3b15ccceb. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZN882128497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b892810af186ed23b0a364de084cd715aeabebdf3436756141cfc246662e766. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNFJ2118464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fc7a9d4a2070162adde2a62d5eaa5fe6fbc6c3c5baf3dba99e3cb767eb9691. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZNFJ2118465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ee0fa45d5969de1002e4e8ed555268fee3ec7d432941a38259638c29ef8a05. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZNFJ2118466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4020ef95561796df70e48086007a6d873f8c91b59d181f3f0172c41fb52a33bd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNFJ2118467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66983071fc30c3149f96d71110f73d387777e1d5e1ebddfc8b8d5c8070125934. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNFJ2118468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8336ffa8157a5f18051904b343782bd2fa2ed220654c47803704dea68261c160. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZNFJ2118474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc135dc6f474316cb8e000f9ef13521bc3f646c6ec4325f89b5472bbd59b5f302. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKZGC2203538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf530b45fc2ed67c968220dc4b465668e4c8b272729b14253589c4a0b349db233. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/UKZGC2203539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f73ae001d233986f5c116afaa32c653c7a5e07d30a1625fb82c30dc443c6221. 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/QZN882228689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c2bcc0153540de9d4c4198ae6a69e6ff405ad6cecf0c66eb01691421338c1d. 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/UKZGC2202069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f73ae001d233986f5c116afaa32c653c7a5e07d30a1625fb82c30dc443c6221. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZN882228689.