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 0xe842be8b20a2b1ef5922c9cfc10fc0638b655f226a37fed86f39fc3944c23ed0. 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/2523d4be-f798-4b05-a83a-e18fcf6bd719.json and https://artists.proofprofile.net/proofs/artist/2523d4be-f798-4b05-a83a-e18fcf6bd719.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 0x1e84eb041ec5f09ca76df1d18555f015948e2ff04394a3f191036d995dc89e7c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USI4R0914376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311a9de948ae3be6628e7ce91dfe541fd372e1d45a65188728f22fd4102df8cc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USI4R0914419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c11f53733397d95dfd7a899e2c2736e60116311d5332dfc32aae964921dc7fe. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USI4R0914420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678a7b1ea2c9be4f8bf6710faf570ef51d8abe04e7c7aa6f1f5bcbeac79d4cd0. 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/USI4R0914421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1522090ddde76dde4e77f38631e505adb2cd321d7c8b7be49388c5aac6b8eb6e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USI4R0914423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f4c549e4aa208d2bfec0835531fab6be88450f881a88723cce3804342636b3. 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/USI4R0914424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d241e617c42240f73fa94be9b7960587c490403cc72c3660efc54ca4f1c23a8. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USI4R1014875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fc2b0105199bd92e1e8d0277c5190cb57d08b5d59110875b23dfa6adc92b4f. 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/USI4R1014876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5396ff538616f3478300be2a05069ae2fa63622c041ffb9f76239412ab61cc30. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:18:17Z), 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/USI4R1014882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62b0fb2d20574aac285a0d60fa82111360e4dc2b2ce3bf2eb478c9ae2e2c76b. 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/QM7281802394.