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 0x1876aee585f63c9bef32ffcba7f1cac7b26316b12fed10ae4a9416f8824e59c9. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/411e35bc-5682-485a-b4dd-de4ead0dfaf1.json and https://artists.proofprofile.net/proofs/artist/411e35bc-5682-485a-b4dd-de4ead0dfaf1.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 0xca32f7b75da517a1bc7403d046e9846e2891ff0505ad4d7b08c96be24db770eb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBMA22406835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8886b9d015977248d40e0b0c17ff038dac259d79698ac178fbf1c17f67622e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBMA22406836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e2287ea77b99d14da0a26875c51df74776956bedb153e6ff079d69db1e6fb6. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/GBMA22406837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6913f67a6e73c864bb48a6e3045612cb49313634b994cd72e91ed8ff2033a8. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBMA22406838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec206278af746322091cf4cba67a1b3ff58ee9b30fa27bc16c1055b901a2c928. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBMA22406839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddc10844e5a897bf25ba40e5609596700d9df9c579080f1a10f66f23e888d28. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBMA22406840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3514f24f278378530482901d923b4ea2a8675c800c66843deb2f42ba52f3d44d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GBMA22406841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd523338bb80dc4758420df025e876f7e711409ba441c859973e1ce8529a2e2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/GBMA22406842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08b083c3b3babc4617f0f69f8dab1e85b3cafcdada790fd46cdb0856c638791. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBMA22406843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5d0d70faca533493f2f448f37fe1ddad06660dbe94113907281a7bdaef9e0e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBMA22406844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca32f7b75da517a1bc7403d046e9846e2891ff0505ad4d7b08c96be24db770eb. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GBMA22406835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8886b9d015977248d40e0b0c17ff038dac259d79698ac178fbf1c17f67622e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBMA22406836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e2287ea77b99d14da0a26875c51df74776956bedb153e6ff079d69db1e6fb6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBMA22406837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6913f67a6e73c864bb48a6e3045612cb49313634b994cd72e91ed8ff2033a8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBMA22406838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec206278af746322091cf4cba67a1b3ff58ee9b30fa27bc16c1055b901a2c928. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBMA22406839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08b083c3b3babc4617f0f69f8dab1e85b3cafcdada790fd46cdb0856c638791. 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/GBMA22406843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5d0d70faca533493f2f448f37fe1ddad06660dbe94113907281a7bdaef9e0e. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GBMA22406844.