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 0x9fe8138b8f11641a7a0f0ef567cc41f45b6c31b044abae3569ca9211a7a25d2a. 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/95e2b127-8bf4-456e-b9bf-7f45cde81d23.json and https://artists.proofprofile.net/proofs/artist/95e2b127-8bf4-456e-b9bf-7f45cde81d23.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 0x8196eac58bdb12ed71823ced8e4958a39437262162589052313ebe5b0913fbff. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:10:15Z), 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/GBKQU2082035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0301df6f701720a21299cbc33fb94866ca09e9761bdb59b30da0d8e8ed918fab. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UK74K1400550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0301df6f701720a21299cbc33fb94866ca09e9761bdb59b30da0d8e8ed918fab. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UK74K1400550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62a9dcc0f1a6a4ff30b468820b674f0c5963b567a2286135ef3d0b14d2890c8. 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/US83Z2131524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cad84a5cf175ab2d7795a027fd6e70fb662ec46361e30860afeedeec35ee3f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:51:29Z), 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/QMPLY2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790e182090f6bc595013428efc0c5739f90ebe65a44fb687d13fadc887fb60f4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:17:23Z), 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/GBPQS2100188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fb2dbca865666ce65190ba444cb9e3ba5be439bbc2fffea6932be2fc3d3634. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/GBJAJ2102205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f46173aafc72e94c6ec29a52c8a1221843aacd62ed6d9a4e5464754880ab2b. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GBJAJ2200442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de23e1efa7b997618591b19135f46d3bad8cf792321ae48efe2212beab538ab. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBJX32263051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5827836f098fb7dfb32511285d4281e186d306c5bf52c63088a1a76cb2a4f8f0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLRD52316703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f9a9ec5e7d219b9bdd42f45e74139beb6afd3ab91776f49e7d7403d069c0ae. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:04:37Z), 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/QMFMG2337189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7e281bc22949d854079b106318caf01393bee732247f92b760a737b494e100. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QMFMG2337227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb5b7ec3934055581e259275eb1e2f8fdef005f5378196e18fb59f5e3635d84. 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/GBK6Y2422603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95793572a6fb3450952a7f9737fa55bbe77f8c8da72d8e0de63d8543be92c9fc. 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/GBK6Y2422604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c5056c43fa347593d844762f871f492ee4e81a8143167b75485019617192e7. 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/DEX042400013.