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 0x5f07c6413cfd0e63d75bd6ffc7287fc74c8911596a7cf94c59f9dc6a100e9a4b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd606620-d946-485c-b890-9f62ccaf808a.json and https://artists.proofprofile.net/proofs/artist/dd606620-d946-485c-b890-9f62ccaf808a.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 0x83dcad0094a672365b10e8ea4f7eb39486a25bb084bd032fa92757d7c4dd0c41. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:35:26Z), 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/DENL81201745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a98e75b160887ce4e73295cad9622d8899e10e352c71775d3ef6481bc1f9956. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:04:55Z), 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/DENL81911834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0afaadad41ac7551f0ba8c1b2bda225dce57a665fd8b6c022a00898eca768ac. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:00:12Z), 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/QZMEP2409060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2da02fbb501959814c4f18181460b775045383058a8134ba303c095fd29b82f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:59Z), 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/DENL82224389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef15df0d9a06d271b130252580a1a10aee009a62ed6aa806a204710e425f1726. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:20:53Z), 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/DENL81804107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0f9757e53c7314d1c4d185b01844e6e37265daf33fcceda1dda2163aa4b1ac. 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/QZDA62338859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3262f3866f439dc7e2e0cd38a9fb6e5e5c338f0b442b742841b1c5445a68777a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DENL81201744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7500d9fa781a6241a82b8641b08b3170d66a7eefa0faaee5801069f8bcb1a977. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/DENL81805739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e934c5854feaabb8836e445177eacf0a60eaa440c072cf63e05f5f1b82eeabf. 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/DENL82015117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c86c934cf34b5a20ebefcbc8895c34aaae11333a41e36023c6fa44e3ee0fdc. 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/DENL81100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf3a76d2811e4a2d44a57298d2f70147aaf144861c29af2f523dfc5dbd9f281. 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/QZDA82436532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6a00cfda8fb0208b306a46df9a8179deb195d7d6f40dc13d1b0fdb66bc04a3. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZDA62293524.