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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7713986d536a484112e26cb07195466e69ff9910bd07532d3751baa51670e099. 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/ea110134-ed89-4524-b8ba-f63d75c776dc.json and https://artists.proofprofile.net/proofs/artist/ea110134-ed89-4524-b8ba-f63d75c776dc.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37fe2ea1e4078e59ebf1d347249358e99d78bfbc624f76c2ed1ee6bbcd97d5e. 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/BXKG22302557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed32dd6acb0918221921aea3da075c2e1730bd54ff5dcd70feaadff82034735. 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/BXKG22402903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a700dce8a747054214e88c4f152f9583cbc8db082bb300851edd577d98f47a. 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/BKQT82500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25eb3f00e95dd663e325f6c47210a959fc99328a36a48ad35fa33ef71ba840a. 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/BK4442500150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39ab7fcf377eed9f8961ff1aeb0c0473671867944a408c8b7eb03a840b6972a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BK4442500394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bdf2ac8e14bc4a862e3606858408a29651ffb0604f556e0e9dc175bc507868. 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/BKF5C2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aadb160feedda52f3edd8a63236d1bfd2c76c6286b368f5d063084183f1da88. 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/BX7P32300678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837dca47821946a6abc3f4c384f2472c5ec76fadb9ccae84e2dc164f998d08fe. 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/BXKG22400831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b0f4914bb12095c7e3527309406dd3e0c49952cdd8c2f42187a72a2444b35a. 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/BK4DA2401369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc81507f76e7f1a2194f6b4b03c9c83d63e556c350fc5291ef8172a1c10874f. 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/BRWMB2301120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906ab30a793214afcc4e744eb40e33400e53ec7af8277bb96256300b1e04a1dc. 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/BXKG22302794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bfe53c23e2be4fa936b7aaecd453b254f54115eabc0abae2072c977d4c8f6d. 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/BXKG22302795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60594d18f472c666387dd6bc23cb85ae1b34a4ab4e05c0f594f5c6649d8ed02a. 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/BXKG22302797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9d9c7139a009ac5d83042f79dbeef1b3ede56ac91f2dac2ea4c424b876d298. 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/BXKG22302798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4275b1f9b1339d05a9dc5a7e68e7841048781dae5e49b7db7616e643baea2e0. 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/BXKG22302800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523fc5aefe45b32ff56ac617062df0a96bbc488a7cee397b2e2ee5a318f2bade. 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/BXKG22302801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073b6d54443212f811f11ac1bf789f60a280f0c66103e58b5920942731917e12. 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/BXKG22302805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a85d09e531dc2b6916cdf3fc02b3ef19f0500a8ed397d95fe6890a1cfbe56a3. 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/BXKG22401517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f497d3bdc1d4a21fcd46a2341bd3a27ad4ebc8e3386e4e514d0f4fe1c3a360. 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/BKDFK2400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ccdad854ccf40ac183d00e7c17553b9466f9476eb7323e7b8faa9b4d169ae9. 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/BXKG22302827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabbc3c2c66debd3c1a072f4265eed16d56000248365a99494199d8ddeed7279. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BXKG22401175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9439ec5b7735a7f69daa707acd83e9d23a06b8dad038f81c937650fd87b6663b. 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/BCE7P2400771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf95a0ad2367a97df742e89403b1c2b8c5d390313abe7602465aeccdf228064. 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/BCE7P2400772.