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 0x67cd366d2cf8a80afa8692b677bd569967489ed96c52685b47196a78db08b32a. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b1d7054-76f9-4f83-ace0-4ae7752863bb.json and https://artists.proofprofile.net/proofs/artist/4b1d7054-76f9-4f83-ace0-4ae7752863bb.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 0x7dd903d780582c1ebe2ccc82e5503ceb7f5c780f7a0e8de83a4e0d7604fb28c7. 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/QM4TX2231709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3e59a43236425ddb66d9c33e5c16c421b7371fd04646f00a353ea8aa3d0bec. 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/QM4TX2231711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c538ec8edcc113754f63bacdb7be606dcccc3e8eb9ddad470d13b5763f471a. 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/QM4TX2231716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf648e438652772277ec86d4e97cb3e8c5646a0e595a62269ddade83623ae5bf0. 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/QM4TX2231717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7ce2d40b020f44a6c9689bbd0f0f27161e0b0488b8c7d7c8346f842a1cec60. 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/QM4TX2231719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf776bd4574e6c4a18e54b0f35a272e64230da7d31ed189a25acd721df6cfde35. 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/QM4TX2231720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d993423e69249417a1002bc3e0074637536c169e980d058b115d8a0d82d1c9. 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/QM4TX2231721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a38d4519baf56c22ddcf081c24c6fc4578903c10fb14cc6d83eaa3cd59e06c2. 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/QM4TX2231722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfe4fda08a24dd2459236a3cf208905736972a6f59463ca165702ba38b30d94. 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/QM4TX2231724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd95c49fac5da1c291a6f22eb10d3ac1064ad18788b54d25b7183df142c631a. 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/QM4TX2231727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5873fff93fa6064619d7ea4063884e33ac473e11ed529765bea0c8f6ff5cd299. 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/QM4TX2231728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665951964c4ec06002116c3ccd6ee1247c5ef12fd45a2aa0413b193572ecf039. 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/QM4TX2231729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf237ba88404129cb711692d0f48108d2dbdaeb135131fdc818702888b6e564a. 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/ES75E2203281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bb5f16ab9d4be09ccf29aaa78a41437010a36cac1b0fe47ee8df361776330d. 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/QZK6Q2260185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae32503a5e4804435b4be5e6c3457956651e096e64e50791231420206dd4bbb. 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/QZK6Q2260186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda105f7834577e351bb4b381c134c986ec512af2ad2696d9331a5be16f83578f. 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/QZK6Q2260187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ac081d60a833252311ebe02e7157c9b376101ee1316e3b15c437edf4869d98. 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/QZK6Q2260188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed583c7d5abbd31f7f456a9f21cc30413084d58ce2ddbd04b5ea458b3d6218d. 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/SE6XW2181878.