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 0x867cbfe6450bd6189baacd91b34f78594949902db785c168077c272d6ca00ee7. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/273a916b-04bd-48f3-a73b-d860a800f40f.json and https://artists.proofprofile.net/proofs/artist/273a916b-04bd-48f3-a73b-d860a800f40f.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 0x46d70181d1fa1b709f7b61dc6fb0feacff0044b2036d23816a3394de08e6c5dd. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCABO1308930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1a8fdd4c3153af0dcd98be8aae8c6ffd16bc422cc9243391d7cfa59610b54b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCABO1308931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0ebf05b0a091be164fd026e95584ec5f3cac387e6a44240555b09b98b88712. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USDY41822921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0ebf05b0a091be164fd026e95584ec5f3cac387e6a44240555b09b98b88712. 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/USDY41822921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50881430da8cd74ea7f3b529f263209fe119f3aec9bc3641af30c56f18e71998. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:37:47Z), 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/USL4Q1808783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50881430da8cd74ea7f3b529f263209fe119f3aec9bc3641af30c56f18e71998. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USL4Q1808783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e1a57d049a09540e3c8abb5e4e4a136f3a6a55a7dba151f5d29cd0fff716ef. 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/USHM22228419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bddad55d3fcda0300d8752766267f95decb860b95a8e0f28711bd820ca0fa22. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM82560899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9ec083af666fb1ae2eab6f12e973d8e04dbbe6dee94508c00c4195414a314b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MX2832307351.