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 0xf4b7cd29d0930208bfc311293eb45749aa115a575eb7ba5246c7b2fb4980e67a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87b797aa-eb34-426a-a3c2-291dc0f1fbbe.json and https://artists.proofprofile.net/proofs/artist/87b797aa-eb34-426a-a3c2-291dc0f1fbbe.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 0xe5f234c76b2afac253887cf1fc6d1b6b63418f840195e4678004a2808233820c. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:43:42Z), 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/QZK6G2449819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4adeee1a47e744154ba6bbb5ec582173db9e9f903d3279811ee158850e53d43. 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/QZK6G2449821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc938527c3bb64c5d56871890a77a3223e822dba864232dc1723ac7dee92d6bf. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6G2449822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dafe07041906cd977b2cd5f8cb6d22ae43a7e3eb4a35aacd87885409e5564a7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:03:42Z), 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/QZK6G2449824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fd0d2b4f92c6502c4a01700e9d5681225200db40b49dae3e11acd1c09dbe27. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:28:44Z), 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/QZK6G2449825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34437447ee57b9028b3faec04a427636f9614c621418ba0b397a653a35c9b4f8. 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/QZK6G2449826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f5ebe5413dca04b3de75b2b4e5cc1f00effe22f8f8ad1e7cb3a5f445679c3b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:45:06Z), 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/QZK6G2449828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffc9dc87acac31d7471324d1c88c0b914be6bcc9bcee5aca50b6fbdd3615c0d. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZK6G2449829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66719bf71ecf70288fd43f2c19f2070a69614a082224c7dfda2c525f558b9567. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZK6G2449830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f9fe452e827092dcf6f20b2e2d2cbfc4ce09d1ef8b4e7a2910d574c21f7be4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6G2449831.