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 0xbcc8e942a222c9422c43cafe4b241a9ce1ac40a521c57203d0bad698716c6ac1. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0f3311f-a5a4-4cad-a84f-a0e3c568ef4b.json and https://artists.proofprofile.net/proofs/artist/a0f3311f-a5a4-4cad-a84f-a0e3c568ef4b.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 0x6fc41b20eb06f391a0e7fb99ed3b1ef299bc64b8eaf44b53abbe8014f08a74f5. 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/QM7282405374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ef6b7e1e606ac628a9ccf4ca71b87cd029f11764f90d8285b2cb116c5be3bc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMDA72396712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8499b95830da8d1dd0d958c222ecbc87df291f22d43faee28481f7a7856678c5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMBZ92392636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91f3fa9982c42c7c4de47216d557a802bd19aee68fb4399b38c5193a2d0fe54. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6P42315695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc75ca0bebebe7a2fe73d2b8a2df50481d76847f3d4ea76a9eab009b308d683f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM4TW2380738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c8ee80b9a13f53e926ea2bf09dc636a0091a2563e450f8e4d36f5038fd6146. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKPL2207871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fac4b78e1c9eefd8a5349a0aabfb4e34528f2eaa78418404f5f8b152a25234a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKPL2207872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e43c71b2e2b38d82e1de51dc9d9c08cc469a33607c189fe8ef3815926fd1ae. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKPL2293998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb8f0f2b6c5d8df4f5ee66a5014d479db8b3c177911ddc570d6a3df4b45721c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL2204255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e43c71b2e2b38d82e1de51dc9d9c08cc469a33607c189fe8ef3815926fd1ae. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2293998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc41b20eb06f391a0e7fb99ed3b1ef299bc64b8eaf44b53abbe8014f08a74f5. 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/QM7282405374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28d95a6ff86005cf8e5f0455f91d3e10a9f4b245e3a61083d8f83d83ad62dad. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMBZ92432482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28d95a6ff86005cf8e5f0455f91d3e10a9f4b245e3a61083d8f83d83ad62dad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMBZ92432482.