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 0x93904cd23a10d88a4c5e24e091ba73e69ff05aae38756071eb234be0157bc945. 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/7ebc9860-2c82-4f6c-aff2-853c7895776b.json and https://artists.proofprofile.net/proofs/artist/7ebc9860-2c82-4f6c-aff2-853c7895776b.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 0xbacbc502da3240afb9825d1521dc9bcf706c64886d311b42df2112d8f8fe2739. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZHNB1955994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8b6e7c8fe7b1e18aa1837e5dc0c3ee4d3b78a9974933df8dfa4b40c61ca078. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/FR10S2118907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587075f3fdb3ab25f259dbfa09bdb3c4d2791efa8500954fbac1ecfe6a457953. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/FR59R2152060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02682e53ca76c77ff3466eaea0bfa8f6a818affdf9a5104b6b9a66ed9e006a1c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX452154671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087f3b5fd380cd9b9116dfc8cd8d072cbeec7d18f7753ce22408fb9afe8f765c. 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/FRX452159861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c103ece26011bd687944ecb9b21f9e0d075fb7e3bcdab38a206a4a9d56b23ca. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRS182147496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8fff568ecf4d02ba0d8583559d639ff5d4bb24319221b6b1ed9ab746ffd34d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:27:37Z), 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/FR96X2215597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cb859f9ff9fcc66b9bf2a34b0fd23e1527647ac2da0fbc5879ba1980410a8f. 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/DGA082210977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b2f40d6db62891b81b8339d9fc0ba6fc9fbd165d9c4ec95cea6558606c75ec. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DGA082210974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c3fd271a0c961fdd18172566e08b95187a9c2507c826b126e5e768362480e5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA082210978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ab7fb550c3c857bbc4242e8cca9a75255a9d8cb2592a7738c43c0a372dcfe8. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:48:50Z), 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/DGA082210979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7a9f06b94039a004436ebca489945eb92769d80756e19672732c945e48c3bd. 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/DGA0P2359784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf8343767e5d0064672ff46c0da5a8a69a0b27004ba83f986a3437bcf105dd7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA092444494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313be1e94675499ceba8dad86b5c61dc8a4b872d23adaf02f39cb09017ebad9e. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/DGA092439999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368925bbc8edbc3ee4e30d1ecd89f811059f79a7b19cad0e7874e2932e950259. 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/QT6622525457.