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 0xa4ab3ad372f17e4144f7103f2259c396ff737d6888bb94553ce911530f665be6. 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/e1bf0562-a221-4cc9-a5e2-25ba8633d3ea.json and https://artists.proofprofile.net/proofs/artist/e1bf0562-a221-4cc9-a5e2-25ba8633d3ea.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 0x4fe83d8dd99e8f9d650784591a2c9ba21fd87a855fc711d3a6b598081d17342e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USANX1400176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bbfd2a185df673d8fb361328940df9969c5ca5cadb526716d8390a433804d5. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USANX1400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174e47a558b3224afdee678b14d3fb64880415de2f4afa472fce378a48dc1be6. 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/QZ5FN2250594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ea53ef5631208bf460da94249890930909ba4c1fc6e291a1cd520520c7d476. 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/QZ5FN2007736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78831a9ae56a93ba18f5728d18dbf62a0dd9bd72cdf2c01771a6113c922dbfe. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USLZJ2017761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb824659ed50058fef547e86671b6829e380a4a0ac351361c7012a87233aafdce. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USLZJ2024007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174e47a558b3224afdee678b14d3fb64880415de2f4afa472fce378a48dc1be6. 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/QZ5FN2250594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef4d6b51f0d8fac8f0f66501ea18718dbf60561a41d815f7d72bfdee13cc5a3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM7282422652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2913788f02cf45d9c009a73108f8d8d29b796542c1a5cbf9fb9ad51833b80e. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QM7282422653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2664537c89576b601de73e45ebb41ddcd565334567025e5769c53201a8027523. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:43:22Z), 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/QZWDE2397798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287eef964eeec80b66f201361f089c4802a6f0573fe76b1b1f621b342b9a590e. 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/QM7282422656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdec4a216e01db21f54173c4d9d83cd17ec39ac4a0da273454574a06cb4804b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QM7282422658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45031e44f1721633d54deda1d0c38d8aa341d2f8f4df6edb89b561679795cd86. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QM7282422662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9ae2e294733b2ce443379baaaa8ea82d35f07d49c7926afd44dd73e00eb7c7. 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/QM7282422669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f220a8f32aefdf43aa0b96c5ab30212da4181beaf350de01556af41978b4630. 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/QM7282422695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890a88054163695276d2f76af6374a88ef09e01f06e271bfce87e25e5c74450f. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:07:16Z), 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/QM7282422697.