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 0xe4c9543d495f0246229c281756bfe8e146c818c07678a695ba80b80c1d56e576. 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/26f39747-3b6c-4804-a089-7efd5fe728ed.json and https://artists.proofprofile.net/proofs/artist/26f39747-3b6c-4804-a089-7efd5fe728ed.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 0x77a85faf6974b03745fb33579fa1b2fc80c46f56de576538ce9dbf87960aa39a. 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/USA2P1392524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a022fd6635921caebd03860a1bdee3a3a3daad22f6c58424b07feaa5d9a430d. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/ZAC030000816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825fcb9a6862dbe0382acb16c433d434f32088e1dcf17796a4a5d567d70b0256. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ZAC030800529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55ad2059fa21f1dc46a3b46db9c77b7c03f4cad8f104495f166f15340639fef. 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/USA2P1392522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49aaacc94aef1031c44af7fe27977233fb8368266a95ba75f91e9b3633c34c2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:30:22Z), 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/USA2P1352246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f60e2541260ca9c02daf0862b283eb379d5e0947da66ce0f36474bd10d3442. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USA2P1352247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7f129543b903da85f4818528ee8c0f68452baed01743665b016b0f9179022b. 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/USA2P1352248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91e6e507ab578dceef720d9f78933d79c4c5406c006876db49813804fb506ab. 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/USA2P1352252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44aec246454a138f7d68b9cec16339e31876a8395790d0b8168846631dd9cb5d. 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/ZAC030100449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43710a802a0cbb9a6476eea90594c711392e68b38848f7028026fe8c9733fe0d. 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/USA2P1392525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aaa9cabc647026966884581a11825f306c334fea9b26bc7196bf404c2c492c1. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/TCAFA2090737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bb8aa2cb92ca2fc800ea011685bf9c431903e3735a91fa455821a4815935ce. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAFA2090742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320ce6e51871bb0e5684bccd9a890706c64a39636a5e12cf646490476f31d43c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USA2P1392521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfd14dda4796a601805d0a5d749a03557215806004d5d807af3be7e4ddf4d4a. 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/USA2P1392527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b2d6691809ea0239d680674515712c37087eec07b93ae595f7dc32732b8618. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIZ2430590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cb19d7feadb5faf862e64d43608450e5ce67e5ec5449868b4bdc723b0f7d3e. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:00:43Z), 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/TCAJP2584381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ace5cbbb021a2d065f4beb1a14fc633f7e438f393ae2dfaf78a94d9cb5562e. 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/TCAJP2584440.