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 0x47fab30badf653d452771c53fb0828bf896b0bc0c87ac6ea739a933914a52740. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be6626f4-847c-4685-9862-39714423b563.json and https://artists.proofprofile.net/proofs/artist/be6626f4-847c-4685-9862-39714423b563.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 0x3fa08b57e371ff01dfaf260db5b50d649c0124e85ff4c26536333c2f6a825b8e. 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/ITU660900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf844bcbfa37e1f3287e2a96de6abfd374adeb6b23b114d882ac7198fcd343be3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITU660900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdf4d1d017fd526eeaf0fefdad047f17b5c3c5736e7ec004f1fdd716fc45d17. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ITU660900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa105616cfc91f183582fd06efc1a5e9666d81a88598b691174b56954a465c5d1. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:22Z), 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/ITU660900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8759a079be50193299f6c25afda4124029801051d63b8d74982af97c5eaa29fd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ITU660900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a8172e38f464eccae3ac60f1cdec5ced7866e0413b96729c511c087bab2e15. 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/ITU660900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb9fdb4194b4f389f1821a7ac8a0f96ff9c5e332bf91a7330d74798c71f0acb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T13:59:45Z), 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/ITU660900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc69c00856d1dc94a401f1636cf1047aaae2defe8c00f9f2618fd2d26ba717b. 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/ITU661300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44aab2150c099b7bacc0bc47fe1344cc96d62a07c290c87a3e2a6b6b0289d0a2. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:19:40Z), 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/ITU661300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c6b194b0a8d82e04b97fec4c1fb0832d82699a20089f574d771e114d86d3dd. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:47:41Z), 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/ITU661300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ed0db204609f5e04d6e30c357de653f0e9d68966c5ddd4c92d99207f9e260d. 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/ITU661300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b14974e2d4e5d4c6f3e3caa296b6801d89157ea5a5f600cdf5db1b07a76348. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/ITU661300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c5daa59269d6d194873992106ac4b716927ab7181ccbb24fb042ba747b9230. 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/ITB001600041.