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 0x109f57db11768d5a06903eac592d22755f911e0f8347a1eb49b5720210d75304. 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/673fbd68-4ffe-432f-b087-ee7e9ac80c0b.json and https://artists.proofprofile.net/proofs/artist/673fbd68-4ffe-432f-b087-ee7e9ac80c0b.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 0x1815a91793c7be704cc91ac9e63600a4b49a67e840ec368a84a8e8d97defa046. 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/ZAC031800292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf6a0fe5051f58f9905e1e784b997c4f7695bbb8b78350291d5990b3dd8f4ea. 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/ZAC031800293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c7dae028b99e32628630291c89e8116e699fe32fa2148a67c181d6369cf266. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ZAC031800298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f6394b9a9f5fa2e0984b4366f0336798f59adad28a33196f7b4898347d5370. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USA2P1323822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a6e992570b0bb538271985ed43f30ead229f10360fe174ba89eeef740f0ac2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:45:37Z), 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/USA2P1323823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b2045f4b271926ca40b409e0a0ebab508f651ad641fb0a083b4528ab036a89. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:16:01Z), 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/USA2P1323824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a2eb8985c199baf810252778dd407b35b2838627e5ff09165670b6562b6c68. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USA2P1323825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610c7043411f79a7e786bd4434a4991ea838862e36699deaaee3823f7da1170e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA2P1323791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456df7871878db5d69728e3aeb3ae0758407beefa2cefb7eaa6a38bd3b059957. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USA2P1323801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d9b6d1f36e7b664115a149f08eb003487d1c61c829ccda7c6f18ca028b9924. 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/USA2P1323803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dedcb6317e9c0a0677c11fd195197f4b52d96cb90cfa4677008b3aa89a4315. 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/USA2P1323810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab3934b2796e156fda9d0f7db96579db3919bfdd28054c470bb08bbc558e2f9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:02:13Z), 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/ZAC031902645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b32f9b0f7bc159f8330e1f0de792ee1f0b6c2e4c66f7c6e4e89ba075239f506. 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/USA2P1323832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e6106c241a9f2e5427eecc8e1b086baa21789a3266730051cfa5fc38c832fa. 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/ZAC031902627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb06b2883124ae32eaeb0e7b1f44dd74b588a3e1b336a2ba962380a9938144c. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/ZAC031902655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88f4a9ab0879dd19440cce6e3b4717b037cea4bfe0ec4776aca4a58ba4d964c. 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/ZAC031902607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cf24838ce611710cb2f49ad4ef61e0cb2ec3f0cc25c6821bcdd77950d1b20a. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/ZAC031902651.