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 0x4114bbfcb448bc8a516f539cbe4a912490f08da81269dffdb0a456a49ae8e962. 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/b5cf946a-2239-4bb2-aea9-7b0e7016ce38.json and https://artists.proofprofile.net/proofs/artist/b5cf946a-2239-4bb2-aea9-7b0e7016ce38.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 0xa7099c961bf2175f936ff36d30e41cc41ccd62c803c72ca36fe1de689ef93c18. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLV402101565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7099c961bf2175f936ff36d30e41cc41ccd62c803c72ca36fe1de689ef93c18. 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/PLV402101565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e170bf038d037c7e754e60440978dd7d3a11c013bfd6b11ff2dbeb1f7d2b860. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLV402101468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497e98fabf749828892bc22807ee5d27082f2c2423d00712ca7a5567950e6000. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLV402101338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcdc3302918b4d826f6f89e9810aa3ba4aa53c77afc751d8934f756a85626da. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLV402101470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9ac4aed1b29a3377600d5790087c98845c382e3ddf9cded25a9bdeb099cd70. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLV402000957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13865708bf657aec7f1cab25528eefe5198b1c37bb9971371c84e8e61339928. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLV402101380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75c4f1b7ec1dcf30b2845994d6baefdcfef0ce812a07207cb2ac957fcae591e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLV402101473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdf582b87abf6f5e8f6091eeee7aed3639fe8ab85f038cc17baeed21cae8bb6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLV402000719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a815b7ee3f14f33306f337c3642f91828788f17c9be2afedfabf26fda0862ee. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLV402101475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9da83d9fa2da5db47711fc715c6c2c258a01da976625544233efc216bde20a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLV402101453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dcd1b8a2781b1cac18679b0b968fef5c33a7759cef97078bafadbfa8e92dac. 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/PLV402101477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8150659366a6bf799fc8d5980c0c3eb0528f7b18dbf0a2bf7adb2a9a2b4027. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLV402101478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf6f0c87e7d73effd7e834e11a5213779ffc1633e96ced3faa7ec19da69c084. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLV402101479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75c4f1b7ec1dcf30b2845994d6baefdcfef0ce812a07207cb2ac957fcae591e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/PLV402101473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727ef0ec49cf3ed75fe332c1581e76001accd6ec99c6da0c60f3c87275edb99f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLUM72100417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d803a97297c0a94b1dcb790ee587ef8d1064f69c51555d26adb3076cb339a3. 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/PLB382100023.