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 0x3a69c88bd7358ba761caa652a2917436f3e307191d2a50e291e587523a5dd021. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20440460-f2bb-4a58-a111-b997f05ccc66.json and https://artists.proofprofile.net/proofs/artist/20440460-f2bb-4a58-a111-b997f05ccc66.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 0x3838f6df0dad8cfdbee89429fdcca43ac0fa248fe434bb680a118140455f651b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ782425466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb112f35ef1fc7df0ed5cd4b46a397f90597537bd1de069345a88751580de0d17. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES52536635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c55cec9c9b31e44f4b77c9138647d5cdea58f16fc04f807a8675b8f24550d88. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:49:08Z), 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/QZK6J2549666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbd42fe0b9f882e2571d65e0c98691aaf09a40eca502b65b9ec9ec95a3acd68. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6J2549667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b11af65a315c9d736ddbb7e14801861fca3328906bf84fb99fce88526d9752. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZK6J2549668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6055f6c8c0407263e1872b1696b16be5f450d2479a9b47550c4efa6ee35db936. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7T2423085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cdb6ac8304418036fcec66c0886d9bfbb67f29f1fd389d29f6f9cb3f461ad9. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:49:27Z), 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/QZZ7T2423089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9213d5744e2d5b9a591e27adfa882d7b14c7fdd2943f15d853bee59959d147c6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:27:02Z), 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/QZNWQ2595217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e53eae83fa0f0dd4202c641d842f8ef5db6e69ab6beb27e267b7cec2f21167. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB42563056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b7471a49a275307ea5c75d4247aac2752f1650cddbb0c4d9b748116ef1a57b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB42563057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcb697577a2910145430b76f5d6a60614ea376cff9d491eb9fcbd5b1c1e91e2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:00:50Z), 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/QZTB42563059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30c745eb7bd63936f49c1dd9447c76f49a6dd26e6e9dc9a2a2340390186b648. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:48:33Z), 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/QZTB42563060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55566ab76384c33c6176f045d46ff01f6ffb863988ddc36d994ed81d7a448a3e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:26:35Z), 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/QZTB42563061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2017a183459141e48b1474799f07b9e6e299b2e058103aba2ea80252ec7e052. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFF2545872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f4d9dad7cede3d4f4a197a9627cd2a44112bab74c3a2ca15c5fd80f2081781. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFS2519855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac56fdb237b6205003c699039ffead174747785f849abbef61f68c1b4c4c37e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:38:19Z), 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/QZZ7R2509493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe415b5b900d377d2c15100a70099b0cad7401d6f1f8e4c68632fb0511a4e139. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ7V2556070.