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 0x30863c8440b1eaaa0ec4f7c0f8e2e59d4e2e779305fcbbdc8ca19e706e0e0cf9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b38812f-f2d8-4d0f-b4bf-05831205b0e7.json and https://artists.proofprofile.net/proofs/artist/6b38812f-f2d8-4d0f-b4bf-05831205b0e7.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 0xf58b8372b7045b7c0c2f3e1a4de265249f3a9d7f443bdf228ee8bf574a02e263. 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/QZRP42490473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47930ae9b56c65f22093ac79ae25fb3db4c29ae207788494ceb6dceb172911c2. 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/QZWFP2508531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c323dc7ba396e3e9dd9c4edfd53f3527ba017d2839e2c912422c137e341a8c. 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/QZWFH2519254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463b6b4ef700d94c98b1852bc6c43ae309b9c9097cac5e067b6342e4b3c7dca8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:16:51Z), 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/QZWFH2519255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6e278b80849d5d52bb4955cbb000b830cd36b52eb31a9f9a5df5f89bf506fd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFH2519256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266e35896c6a3025d0f55eec8c83453f52f8a339a2d9e1c0ab658eed5b95be77. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:38:54Z), 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/QZWFH2519257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca812758a59498f2addf570b7ec600b4c67a55c5351365120bc2f8b17ece8b5b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFH2519258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec91743f3b4f90e5cbfcd645f065f022888060defa43915ca819da69248f11a0. 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/QZWFH2519259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882b26b2f62d8e3d13c3cbe6c30ba7aa2dad8af0881a65807ab7b6c2a7e8fc68. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:04:54Z), 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/QZWFH2557746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6367768c1771e935d3925c467eda9bb5c102abd4acf0470d395a3e039111cf7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFJ2516958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6361ffe0a18644ae33ea4987f42c8da6f0e624cde566d128e1199cd9c904fe23. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZWFG2581275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944edcc6aa5c016728b2dd2ca2b2d7d084b496f1cdb0102412637ba2f8b06204. 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/QZWFW2513160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54cc79f50bfd253dc586e3a4a2e8b29d550a86b280b13a883cfee6dead1810d. 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/QZWFP2511264.