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 0x2b24e929f66c3ffe2add878eaefdd381333dd50aa4016b01b05e556381ce956f. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6908f29-896c-4ee7-a582-988e737b5da9.json and https://artists.proofprofile.net/proofs/artist/f6908f29-896c-4ee7-a582-988e737b5da9.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 0xe12e7a0d79bb01bad66097d3b6fbc25aa906852aa84db8a29721bb4b7c5551b0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5752499797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1eff401039c0669964f3782fe8cc0e9c03a22b7389e4fb1aac004dd4352d8f3. 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/SE6XW2412669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31b1660bbe195d4d49f91e9a1621fb266326866d1d7a538b0c572d0fcb18ba5. 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/SE6XW2412670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5420ea48ba472612ae8ca39edec8845e03aa4096059098594c0160c8941b7680. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE5BU2549037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc762b3ba30e0f3effef2d95adcdb035717d14fb39df75b565e39bc1dddd1b7c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5BU2549040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29d9d3bc3d026861cf2b9f6b3af76c94e578df3d9771c360edc696a84412396. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:09:31Z), 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/SE5BU2549045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec925559400f49df5f3fda1a08ade53c74711f6c8968ad38368fcc98ab2442c. 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/QZMER2523875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b9f9825cf508bc282b4b9fdd1d05f3d0d18a002d53f242bb1636bac3e3548a. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZMER2523880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6446727215fff4bcbadb50d4e04a5b1cf0d8c30b3260b3b020e848f1e2d809. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB92500747.