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 0xff89ed7f774b8f3365fa430a6d345c374125ec412a54453aa23f4017aa36ebdf. 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/518eefc0-0154-4825-90dd-242e3f44de94.json and https://artists.proofprofile.net/proofs/artist/518eefc0-0154-4825-90dd-242e3f44de94.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 0x3af5b8634a611c4ec0548f7ebf372ce5a1346c1f5484ab9cf77c2e5d14cd56ff. 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/QZNJV2374245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eab151263b8510dbd8b72cddaecbdecf0c06e35c11cf907aee1aa65c83eac9c. 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/TWU712205787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf436b9a1dd98b9eadd06d99cf1c8567d11d2a4ecebb559cfa3394518c5e279eb. 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/TWU712205434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e15fb08fe3ebca72f1229e15a0be7e718e94225f4789fb5cea28d7911e3fef. 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/TWU712202067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1df324e30d0c2629a0e6993b0e7a993be35670fc0b057ef2ac27ab8ee5e45b. 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/TWU712104491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a5ccb3beab4e9cb84303c900a2cd50674edeea5a890e80b3cfe722bcc7098e. 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/TWU712205788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780b2175d14e7cecdfff39bc2dfdaf4918e67c0c92ffe2e72d864c62d1fb4724. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWU712205790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbe156c793dde6d82de20320a2f34705919472dabea63f2f1aff451fc4cce7c. 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/DGA052084668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcc44a43f69861c30c589e44ede082cb43c620ade9f26a498c3e3750d73c92b. 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/TWU712203687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d708f177231e820a46dfb1b44b2469ec3df63e365270ee2b9122be946320561. 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/TWU712205791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd3b6e0440b3db5482834da5973b346eac5a47676d745cda6216d46941a3378. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWU712205792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bff0deb4a71dbbef45c26d491f501bc6b7c106b7971e6ba9f4096cdcbfe8b31. 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/TWA452200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65fc36292f3db6385218986e464b52aeb53c365aad1adb49a4f00af492d9621. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWU712101867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71cbd3708e15821ef5c6ffba6a4f2a52305189a5a5027384d00374c4bb0be64. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWCC32203523.