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 0x24d73c264a7b18a4c8e2ff49a8fb3f370ee760bf957fdd620923e365a3ab66dd. 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/cf8d74cb-ce84-463d-a93a-d1149c743e04.json and https://artists.proofprofile.net/proofs/artist/cf8d74cb-ce84-463d-a93a-d1149c743e04.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 0x253d34261c04194661018aa6dbbb27caa0f5456899770465b60d53aeaf68147e. 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/NLT2H2301067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3865a5051821943e5856f41e2eea2674745d62047604b1cf7f058b168d2d48f1. 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/NLT2H2301000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50e2f42b93ebae84474447c65f353589d21113eb660231d522a5780d4b7b85e. 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/NLT2H2300839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0490020741bf1416b2e2c3fa4cedb5ab65060ce5728a92757ae755ba8b7f12. 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/NLT2H2300789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3def72152159901bacc44bbc6e7ab37d7767ce55f95194e70cdc098b8c21af. 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/NLT2H2300781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367578420ed18f78868b2749266e1773cbdcb5f3ef89f18a9725af2c637b19be. 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/NLT2H2300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbff83cc209aedca71ade33eb667e4f9532ee18b44b4c8436e62bc2f4a1fe81. 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/NLT2H2300480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c89c40eb5f4b4bc4ea142ed155e6da08973b9625721e9d3c446799b8a49556. 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/NLT2H2300456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087bbf4c6c27e424226c3f6a71bc0032662eca5d49d0d00f75beab65b1a3c00b. 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/NLT2H2300361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3cfcf580105a7c300879bf7737ac977e21dd15bd14c9007360b648dbf03b83. 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/NLT2H2400232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3d3af87d5d27a3eda082c443124ab1f251a264c0391d68b4e39c182f77ecb4. 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/NLT2H2400380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd2e0309923b3a4b402087dfb6277db073e5b2500833c1568b1947e23254ec1. 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/NLT2H2400937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717c7fe107c3fec466d36d28e124efafcd6ba5cdddb47f0a4048440f1aeb4857. 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/NLT2H2400438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c1e92007b276d7519ebea11519d1ed88e4a0f5c00ebd3aed1a9aa2d537d843. 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/NLT2H2300458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211926f009e9373ab775d40dbbabb0d369d6f49578cd9d4aea0ae0d82c206917. 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/NLT2H2401087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd158017d880afe7fb74e1ddc4bda982109881808e5c55b167d0db3652d28e1. 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/NLT2H2401037.