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 0x730356c9625b9113b1306335d51551084cdc0b50d7659ef40a280acb8a7eee74. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa51ebd6-df87-44ee-9478-417f8e0e7e6f.json and https://artists.proofprofile.net/proofs/artist/fa51ebd6-df87-44ee-9478-417f8e0e7e6f.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 0x0154691ea1a4e185d780da28aac90eec7407c6ac27fe3d8d9632f16c3f3bcca8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNC62319402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6bcba3ac9495d09c123d46d0e2b23b4fd419066265f1391ba061949fd734d7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNC62319412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe1ce11fbc4963936068ea2557db0429a454ac318cd39e1a27b54a9f73d103d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNC62319413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed7d84944dd818ac0e672b1547bfc2228661bc6fb4aa5163aa4deceb22c6c5b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNC62319414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c69765b0dd640609da431ca8d06fe5167ab003f3810e0a5072166e22f07e9fc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNC62319415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4e310c46baa7c408ca22f5a59f4cd949ed5fa1d044f89ade7714698441c98e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNC62319416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87eaadc1955c0a5c61104be3c62e8c6839066441e47207ba9e5a04ab8c41808. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNC62319417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055fad4a1053f9069f310c7cf70674da6cb6f3c019220ba04fdc8d5a25d35993. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNC62319418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367c6e6d68d496f43ad05abb98c0c4abd554eb3f96c8f28c445265172d857bf2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNC62319419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044c3184d89dfed73812b7669502d4ca27d1bcec19f8ca9c092af42a6ec31ba2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNC62319420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd31325244dbef7ee315d280ffee505b478996b7b9646e47e8617b677c0e2b0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNC62319421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d1e01970df062228ffa61e2853f8545bfe49b1b800cd0a14e85938c882aa28. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNC62319422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1e8db6d797ba53c104e1a5f5b4231dca0f17d141ba6305b372a327bb61b4ef. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNC62319423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80353176e3a2e01a082c663e1730ecd1a7596f34716e0de8e1006e04d7bb2132. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNC62319424.