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 0xc0736b5b37a1d43ec68f036c94776ac53e219db6765042f52fe6761eb0ce7a73. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce230418-9acc-46a4-b6c0-ac1afca355a9.json and https://artists.proofprofile.net/proofs/artist/ce230418-9acc-46a4-b6c0-ac1afca355a9.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 0x9a888bddf6a5bad0d908720b79176814c23c0dbe86f06960b0129ceb6cc78a00. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCAJA2455009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973cc23cfbee0ae5f55de292a71c8a6e836a14bb905ee674c4b4a157a158eb24. 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/TCAJA2455088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50713cc71a2c9e8428a8fe7fe68db2b0b1b7fb8c4d8bcab49a35c6431ac8a78. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAJA2455141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135100e5508a4dded96dab4e65e154314a762c18949bd6dda82ee7982675c605. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:45:53Z), 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/TCAJA2455158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ea67fc99389410e4746fc64de35ee1855c03b5b59970b82ca0983c12e199fd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJA2455164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b366e7befe8c0b22675269565a94cbd807b06e000df8a19aba9833eb0e6cd6d. 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/TCAJA2455173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc3257a3c293c3c57c9ca9d7e3b4611459e7b6263489fb25a9ceeb44c9e0dad. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCAJB2455209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca28eb3c457ae8715b8ea92af73aea7b5d5bc432369582aea6634d39a0885702. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:52:53Z), 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/TCAJA2455257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109b5add1073df8116a6dc0c4d8721e9675ad23daecbd1ae51f1e387af201623. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:50Z), 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/TCAJA2455292.