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 0xe849e7e47e85736fa5cb3db978bf226a92663ccdb4d93155e9865d8f9b0157fd. 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/122b7579-24f3-4771-9fff-c2e3a6445dce.json and https://artists.proofprofile.net/proofs/artist/122b7579-24f3-4771-9fff-c2e3a6445dce.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 0x9dd3e0d841613826a85e5900db8c3b31af4af55f43a260553e4b7033272b3ed3. 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/USJ3V1093980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690812d5a373b93c31833ca6ea6378383622d4f86443a891467ded560f5c4ef3. 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/USJ3V1093813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1bcd8965404912c0b84655407e40e2b1ffc47635366a9e682bc10ee951ad3b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USZZR0910798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ace928a8b17730f247bb4a37745a01270cd4c4bcd13edb8030731585066e1a2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USZZR0910799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215b212c17f34cf5846b4718cdc3272d1ee36ce5d238ded13fef2cd97ef80962. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USZZR0910800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3630b4812da83ef07b2b28233827d7ac5b3ef7f147ed9f4da7249b845f62a53a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USZZR0910801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562d58a0fd701a1703f1fec57dbf225f4461b74ff05a9a5d7a9aceeb8ac71640. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:21Z), 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/USZZR0910802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270a2b45199c0c3408d50c3ccf157bda814d4dc89d0d07a20d10a2d450b28652. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USZZR0910812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bb6403727ef36f8bc4c9222f16bda50a361ab3e67409fdcfa9ac48b8ffdc87. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USZZR0910813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4c267034565e65d45ee11d71b04a1068d47869c342734c430050c74da99933. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USJ3V1053033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995c159e3edef403b18dd65adb4ab42719df5abd35785eb423b3d4cf5a1ca576. 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/USJ3V1053041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e86bcf4aa9cddf5b08eebe04baea7722366071c8a989854a0f9c3778e7bf419. 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/USJ3V1181276.