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 0x768456e5b3f35de5f1dc9a2282d8e55288a9e76da03e880f713955bdfe2e9793. 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/d71f07e9-ced6-4b9b-b0fa-a68084eae3a8.json and https://artists.proofprofile.net/proofs/artist/d71f07e9-ced6-4b9b-b0fa-a68084eae3a8.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 0xcd1ad9c3dcd7de4f06c2c2e170923c5fb0f3a0bd27ff5037ed970810f6f28e8b. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/SE4RG2106302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ea413d44378be64ee573068a8c96750720236c06a2030ef7600916fc3652b7. 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/SE6RB2204905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7616fb19ffc512291222a25a9747587d46b2439db7dcab0cc8c4fa2749b1d797. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:10:43Z), 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/SE4RG2106303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df20a85821d80900f733cb161725670bab54606510ad3ab30011b872a2a043b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SE6RB2204903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0df9b5e9b5e6dae3ddbf9c3aa9e0f31c6a96db48cf60fb3f0e26ba153b17b5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE4RG2106202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb45bdfeb042ebd99c4ad5de6cb9031c55d8ad682ca8fcdded93b1767a6a1828. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE6RB2204904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4ddf34f8f0ec82ee0b0f3b8f454fb8ba6e72b23f76047096df8a9b1d2edc1e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:32:17Z), 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/SE4RG2106204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7061a9b608239539aa9b3153e1bf934604cbfde4077a711a6ae8573730de4c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:28:09Z), 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/SE4RG2106301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07816e881a01bec55cf6c9907579be37c3625a2b53b7279be3c521375913bd39. 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/SE6RB2204902.