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 0x2579e5faeb32039bb25a2caa75cb48711b733eabf77e96af20f793b43e5e119a. 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/0959c0e0-0a7f-4617-8cbf-d0ea5cecb026.json and https://artists.proofprofile.net/proofs/artist/0959c0e0-0a7f-4617-8cbf-d0ea5cecb026.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x9ec030e9f34708edce4019c7a109f6d948f4c971518567e1f42985b4ec05cbbc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLUM72000782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8320b9e34c83db8f99a531f3dd5b199fe18e6b05bde8cf488cb35b7f973ef4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PL15N2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32e002ba51c2ff83696e7150564ab2a5b8da5e62665fcbb0168acfaf79e6505. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLI363605110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9143c6b9930ba5038e247a0684086c7d8778d353c0c2d792857cd93c8e43dc. 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/PLI362321123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9f8f8c34d2c1ca08d7fbb7b7128ec8d382c89fd61234ff2aeb3f55d6b90aca. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/PLUV72500769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013804d1e485e0f652e45404b2c75d3c5e1b3502fc90a055d4793dc3f3d26fa2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLS282300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2eed8b835d2a514c111c37095206176beb4c98cada85f983a31d8484964995. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLI365810470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85879390f6184b82f5db543df3e699a8620227bd76c31f78eda657fb069a60e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA552400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6e06b07173ae13a68512fe3fb67433168be41afcd8d5ee4ee74a78a9d26262. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PL2DY2200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2226f0fde94b2ec222e537bcac368f6131d1c6e6eee7c335060795697dd8368e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLS282000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013804d1e485e0f652e45404b2c75d3c5e1b3502fc90a055d4793dc3f3d26fa2. 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/PLS282300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe088f5f35502b14fb4844512c9a3c002041222eaf9f773fbccd665b1e1de129e. 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/PL59G2000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe088f5f35502b14fb4844512c9a3c002041222eaf9f773fbccd665b1e1de129e. 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/PL59G2000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355b22615ba43dccbd9bcac7baad863d9d3a89d886bb3b25804dcc35657db586. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLUM72100632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba8d183b3bfa665d11e79f097b86940b8ca4845e470622216f60d4326f63243. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PL15N2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088d1efec8952a815a02a1dd841bca135f59fb36b7f157264eada5dc016451e4. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/PL15N2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8320b9e34c83db8f99a531f3dd5b199fe18e6b05bde8cf488cb35b7f973ef4. 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/PL15N2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687c720f6f7b9f7adfd0e544f71e51f91a2ad81ae3f15954558f4cddcb9e5834. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PL37A2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1166915bf36215373865b4f1d763080aa74b912a1ef0fc364d16337e6892a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLUM72100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15f574aefa70fb3c07063424740cda0d5c7480ffcadec438b7715d6e23ae798. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLB382400829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85879390f6184b82f5db543df3e699a8620227bd76c31f78eda657fb069a60e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLA552400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba8d183b3bfa665d11e79f097b86940b8ca4845e470622216f60d4326f63243. 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/PL15N2100009.