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 0x291ff1214b71b14dfd9ccc4b601a3fc64b84816a031bd980510fb7708eb64a2c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/065964f5-b2c0-41da-a4ae-c538b113fa3d.json and https://artists.proofprofile.net/proofs/artist/065964f5-b2c0-41da-a4ae-c538b113fa3d.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 0x7daf694fa38cbe865d5c1bc7a6126a05e4b4cce10471b7b4dee84761a4ff9366. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA42481550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58c9d57202a07bd071530d47bb97e0f05f2c3a13b7095ab8be203e4045dce31. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:41Z), 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/QZDA82464373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87873f1a8a6b019a3688a01f0ac2b5984bf7e87b9a2fc4f65b0f27dee8374951. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZHN82428370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9f57c92ac02f528f98e53cc826fd8972e8e810b821f103078c8a9b0b93c7e3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN82428371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4a19fcb292d57f378a1225a334bedd9a678d73606e6b362146d37c3090894a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHN82428372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a614b8305b470d161541f534213c34297d9bcf933583e04bd729cdc56f34c4f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:59:14Z), 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/QZHN82428373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee14b3c250d54b00643b089cecaa6e9c3bd4bdd5393930ca7c2e970ca63dfb73. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZTAT2459043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7bcf50b4d6712c7faa86950f6f847f9e01bd018f23848237161e431f6f0cf4. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAIT2440676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6cce06de08c28a9d06cb6b7e386643e2d0850656131c97a02e65ab9ad5069b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIW2406048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc55f3b42b1bd39fa19f0e98d8ac4b048f17b40143debc7891a8888a8ce19ca3. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/SE6XW2599738.