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 0x15ee3aa5013257862e85c24489138ff6250b8716b6146f7e330031395fdca341. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/039b444e-4589-433e-a93e-326ba5115042.json and https://artists.proofprofile.net/proofs/artist/039b444e-4589-433e-a93e-326ba5115042.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 0x8ca43b8def71a155588390174a813b4d865d4fb34940f778fd27483924587022. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCADA1772097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac8a2cd1a828437787f065854b8039d7a046b4eb1c53ea72d938c4ebcd48937. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCADA1772119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87f2a6f8e79efe0a6639f377853db55f7bb0eda4cd2d811cb64743e6c470eff. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADE1750445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61203dbadcbd266e31f01cbcb03e556f2284fcb80545f6dca396ad1c6a2910bf. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/TCADJ1728199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f8442041dd61a9f05bbe15c9fd05beda7b0f63c56a3f0efd5838fc89960fc7. 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/TCADJ1728200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58fb061decd2accdfcf94ff20f35b0c578403c0bb7b0c14e32e4d1cb6ebd4ee. 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/TCADJ1728219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb15840e468e5e55208d887d796ab6922988b95efa85d5273038c33460c917a8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:47:16Z), 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/FR2X41923803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878ba0bfbc361aabd9606a25c7665693f1d9c124c4a5c18922c30a25ad4b5ff4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAEP1914649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2025dda704240fa00d4807318d5eb957568f54c645dbbac7a2e16fa11bbf00b7. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GX8LE2336218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a9da8907a292c983b8401afebf8f44c5c67d898427b8488335d9320f2fab4a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:49:42Z), 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/GX8LE2309661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9da95f705ddff2195cc619c22a494b53f35948bde555d5996f9076c9ac61a3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX8LE2395072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af8c68c359b85b9da668ebe1c7b9fd453736c54ddadc55fb9cd7a5e023e210d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAIO2447072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c65eff26ae434fbb6a6a6bbfd4dd832ecfb65acbcf9cd5e655569a5a2ce6f5c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJO2544218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd269793595ee698d0238df01492605e37999b9527ff6e2852629bca44886b75. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:44:52Z), 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/TCAJQ2508001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0281b9c6bfb8a8e2e7a2e77abaf930935b60738e2056bc1652af8021899fc71a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:39:22Z), 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/TCAJP2566395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42f201e782224cd83f81c64bf80e4960a01657affa01d713eb6adf358f338d6. 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/TCAJQ2576053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f306852f550f4300f43a11476fdc050206fa4af83fce3eedd19d1515610f5a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJT2513809.