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 0x8c474487e40e8e8b51d562cd1064bdd856c3648261af3514c594283ef67e7bfe. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32ae2064-1dc5-46f8-8177-49cc03456067.json and https://artists.proofprofile.net/proofs/artist/32ae2064-1dc5-46f8-8177-49cc03456067.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 0x5802ea4dd1f755ff990e33d3fa9823baa1c55fa4a1107c29c9e77a46208c5107. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM22402740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8175c6894b3a55817aec7c44661480610841141bafdeea136770511575f6ef16. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH2484218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd6ee7e6fa706b69b5c0d65a3279721f2188e9bacaf1635353e5c1a6297f05e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGJ2454047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efd02102f7246359aa6059857a5894fcb1fe10fa140e2836d960df92a96cf09. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGH2319908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886182a440d96a1386c6ad0f3b6f77730c4301865140ce5dc45e7b8d65848f33. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM82364018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4984da2f6b1f2eac440875e9eac89a801c9914df21e9e400d75e8559d5ce7fc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDY42201184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f6d99e32fbc0aa6ab6f91887dccb565d0f95f2f3df0bcd30e90ff5112091a4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM92256756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870df2e919444a90349d5da46af6f7a94840be8aa4802c5233fcd94cdf06f01d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAENV2127913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9626f645da898c399f2eb17ebfced3c53a86e334e34f969e42f4ab310196800. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM92196403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0934959262bfb61d93bbc0f5a6d64d199af988becdcb0cb384b0ee6ab6646536. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDY42354478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f5efe9de617f4e734691387f20ed25b60d27c4a07c0bd74370c93a4af830ec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USL4Q2494180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e99bef7be2abb1bd0ad9c4d367d19afdc7bdfad4292508ea8a294136c97d4d7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM82429387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8175c6894b3a55817aec7c44661480610841141bafdeea136770511575f6ef16. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGH2484218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886182a440d96a1386c6ad0f3b6f77730c4301865140ce5dc45e7b8d65848f33. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM82364018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cb0f263ae4a4c9166cd92ab622d03558f29174d100358d9fd8a6708e613cad. 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/USHM22280690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4984da2f6b1f2eac440875e9eac89a801c9914df21e9e400d75e8559d5ce7fc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY42201184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fa480d60efa9076864ae763a2c2fab0ac999eda839531a1aa96cc0749e7da9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USL4R2171382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9626f645da898c399f2eb17ebfced3c53a86e334e34f969e42f4ab310196800. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM92196403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870df2e919444a90349d5da46af6f7a94840be8aa4802c5233fcd94cdf06f01d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CAENV2127913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f93dcfc5cbc21d7b573a4a5246279179d37db2baea2109e4466258788269928. 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/CAHQJ2152565.