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 0x3dc801aa2b7a180e92cc90bd1a66e8cde4baeab7f6888dc5a8cdb2f12b997d2b. 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/4db3ce23-def1-4394-a0d0-b0ad77163cfd.json and https://artists.proofprofile.net/proofs/artist/4db3ce23-def1-4394-a0d0-b0ad77163cfd.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 0xdb84b52fe7b1f9859e648973e0571bd79ec3b31c529108fb808481eb254d3cae. 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/TWA211250301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95083c2e2a33d0d24063f8be95e6f1c6c10c05cd01d9fba1460fe90973ad735b. 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/TWA211250303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489ecb65d186b5ba0c653ee35b035f939034dc1b6c56232821be5a1523148319. 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/TWA211555901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6553aa6b974c1acf4717f912a2104f94e2a06622158b4347aef17490413df4d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TWA211551801.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee0ea77cb5dad04647d013374a422f14d9849161923f01e42a9e5b05e33c1b9. 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/TWA211555201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498fedbde6b9b5fadb8b454e2760996c8f72a1c13179f7b79770f1182c18241a. 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/TWA211553901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5d87f70a227923d929fb3a5ba66bd6ab04409cd7bc7ab464ca98f76cb3f8d2. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/TWA211251005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dfb7b31d370c2d4e6b35cf549e93449e858e66d4181d2e89ed922bad812064. 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/TWA211251006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0f8da7618e71e7e77ce05f59498a4591d3cafde6cad2df2408673e249faeab. 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/TWD251822303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31ca71eca0c858ec54bb2a63ecce2646bca616f5415886fda74b63e2be347f4. 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/TWD251822310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c396412518eda11e7ec28c77dcb884b44c91208902ef3e81ef75f4ff27f9a66. 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/TWA211126302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad09211f883175b38bfa392a724a46c1c565af5bd5a246f801a845613474271d. 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/TWA872100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bedca00f81a5cbc2821e17feca69555bd2059a2da6b0686b1c3edc545030704. 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/TWFG72100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd938eff6c5a9ea019d36456ec3993acdebece184d0dd204d277e281f52cb751d. 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/TWCT52103981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a70091b4276960a540db701a7e9a1484d5ea68fa53d2f59c1a699b5d46764e. 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/TWA872002340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e985d848665b209a9d225fd192f9c38c97132be9b11fbb36ee8cc8eb08e121. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/TWCG52099940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9eb9306038ac2c63aba5c4adaedc1e4d723e5052bdb92870aaed11558f18fe. 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/TWA211554601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1412a74a58bc8ee972d7cf608248a1c0906cb54458fecd0427e13a10047efebd. 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/TWA211328901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1412a74a58bc8ee972d7cf608248a1c0906cb54458fecd0427e13a10047efebd. 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/TWA211328901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ade29610ccf63be65aea017d41bee5b8f5c56bb9a264d4489d0a496deae0c9. 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/TWA211310601.