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 0x634f60e7f4a4fd8b5c0b55a985b1e767d8c4e138e06f98c06403fe60f5c191dd. 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/e556c249-4bc8-4758-895a-7f10110c2273.json and https://artists.proofprofile.net/proofs/artist/e556c249-4bc8-4758-895a-7f10110c2273.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 0xc2b95aa960b0350922dd8ed4b9b32f436a0915deccd195b8e4659cc42cf1bec9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCADO1803972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4787761b3b25077ea0f1060e6c37fa6d86160e1466013c76805736b6b0679e3. 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/TCADO1803986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5c9276a5349f4a4ea1a44137a2dd6cd537877d300a7240f1494df52cbfa9cd. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/TCADO1803989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca79712d42be939807af8b467f0c259025de88b94bd80dd22730c1e14c06cc5. 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/TCADO1803990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4102c2bd879d51426e0b3ff4789ab3eac30e92391f06fa9666d8224abe11d40a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCADW1856031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572df2973a83efc6efc484213b2cb7d4c9c622f46da0e03d31da7af759fdc0e4. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:18:54Z), 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/TCAGN2217397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36e42bf600aaba70130d84922b088282343df979e450a3776cf7dcdb6e7b23f. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCAGN2217399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64580301851f847a23c65f3a5a56936221847ecfb25513f7c01c4732644d5c7. 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/TCAGN2217416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2654a541d853fd2367e33f54b8bd51190bae3aa59041b46a2874395a29a7e5f1. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:51:33Z), 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/TCAGN2217417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5779a002a8382581bff9570321734324207de2916954d30ca280a5486ea887. 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/TCAGN2217418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873dcfbbd6692be9db51f99c816a9f379b60dd77d76bee4f286c40a93c4d4c75. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGN2217458.