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 0x9259c59cfc53f4ef71892c17bf2fea077da9d19b3d6297a672eb564a55399fa5. 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/19d626d7-1ab6-456b-a1d0-3d9e8e4623b5.json and https://artists.proofprofile.net/proofs/artist/19d626d7-1ab6-456b-a1d0-3d9e8e4623b5.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 0xca1ba612324bc30f7641ecb21c2f8a550c98a176cd7a63f32a4cbc45914f2940. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFQ2445430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ee823e923a5c6357452380444fdeec529d647886698a400b73fa55861fd2a3. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZWFQ2445431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81468a0ed4713505672f50c8910158bcb771cafe7379d8efe047018a9890a345. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:50:51Z), 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/QZWFQ2445432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe6409455d2b42ccce74f9659b2d99369a7917f3b628b6bd17013be71797137. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZWFQ2445433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038c3e82cb3c8df234f7a8616ba1cba19ffa54367306e784a17108a6069c86ce. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZWFQ2445434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2daf8567ac58001cbb4698ba26a2ff7acf89c46a40245777dd423cd7e4e01b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:29:47Z), 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/QZWFQ2445435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e8a5ff83a7404948dfe5aaed8da4ad4307fc3ba756e397c651ade54077e07e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFQ2445438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa554b123bc01fa0c0c2a7b2e59b66fb375a5e79aada112d5aaf68ee2c036ab31. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWFQ2445440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f3737d6473154842e5b42f7aef118f7b60d947418764b9444ded33a4d5b270. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:34:36Z), 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/QZWFQ2445441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f6e9cf3455bdb0e15e7bdc54a344c7235725cc681ea93b5a8f26b08e514460. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZWFQ2445442.