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 0x3cc6f6338f41acf67593fff9a7170f716cbb1b5cdc04be2083c3c0e6db7e0d7b. 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/bb8480f4-2e85-4d88-a4ec-d2561b7a3279.json and https://artists.proofprofile.net/proofs/artist/bb8480f4-2e85-4d88-a4ec-d2561b7a3279.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 0x655af05dfef13831475f13c55ba9c89591a6344841b76592837464f2708c39c7. 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/USANG2441509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670e1a14c0030231c6be1533cbf14940ab7ca376c87b2b62311faaaf3ec90b60. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USANG2405087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455ac03da779419ea3dd48a2fb1a6e1c29d4c2373e79c558b6ab20ebe14e39c0. 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/US3DF2514063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2513509f0b2a8816510693bda224fe68250c7fcdecb5d18033d37a7a97c7542. 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/US3DF2500297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d5a2c9135732d43cf41a7fbf0e57ff2feb4e7fc586d0d8c8b3f06a622c83ae. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USANG2493377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd00309da76bab2f357e0482157ca42e4ec6430df40c9c0874a078de368e05ee. 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/USANG2496589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d1837ca06d39a21c9103472a28db96c4b67baf5b9fa6f09e1e48bee792fdbf. 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/USANG2465023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf922fbce8a4997d4e80d63310a75deaddf4b01b7388230beec7428788e4ef9d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USANG2444612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a509ec3d7d9425d84b7fb7d2b59e1187ee9ee1e37c01a9f23d7634cc4a964a. 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/US3DF2469837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0a131ba2d157cbaaca65e27f2a70f19af72802a80fcb420c5b72d62db5a1e1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US3DF2432569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb297c4a777c9ecfe8f8935ba8f3af6b30e80ea09e4d332775d2b101ec06f1e. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QM3DF2348117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b9a9c817f1ab7275fb7dd89c4c4d93c6d42e46a93d0ff0242b13cbbbba4b50. 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/UKZGC2400494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72d591528f125ee9a29107898b4c7cf02bb8f2015845eacaa80d77d9b8ce598. 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/QM3DF2422487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63588f68ddc4d549e5fcb9bd73ef381ecbdfe7f95ad69fa5baa6ccda9c4d67f1. 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/QMANG2235818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c5dec1ef9aee1a475d2e2c0b88354477d0dd902d14e1247d7683791eaf5375. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/UKZGC2307220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e9fad43a16883481129554001275893f9c9cb24eba12b62d32e5246f77ce6f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMANG2216069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02f2eae2db7fe679e7f934f7998ef900a6190ed405b74225f2ba76c706b74ad. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QMANG2207100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1396c97368e58adf8723f5b15861c6249160efff193916414721ae206b08cc5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMANG2202287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846070b460543284661227510f8f19d6b114157ae1cb72da6d046c2d97ed78a8. 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/QM3DF2296745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba15cdea10cd0f1ddf1e3f53cce4eabadd9675d0c874f255ee909cd7568ece3c. 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/QZNWS2339053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573ae4e13255be8477c2b3fcbee01a953afeed4b9ea64dfc15825975c3fda8a1. 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/US3DF2277536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cffcabea50ec618ea686fe36477191f1ab3aa0269a963735ffbcd75e1e12fd. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US3DF2277540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9527da8f049b52e916891de3d7719fc6bfc088e6448c0aaae1d5d9fddfa59c60. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/US3DF2277543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94d08c289a0a453feec1f2a3ffa8c679dec11520b639746ad189d9c1fc25a97. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US3DF2277549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41af9353352935a90664ca1e6630e96bb93c47532401e9b4badbe8fc3459958. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US3DF2277552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03ddd679daf8da3259fd31aefaaa1cb0a4815a69609758d8ce81921aed112d6. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/QZMEQ2282166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edf33dba3124220a1e022072bfa02b78ed47ec2f2ae7fe17c4e184501f93aaf. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/US3DF2220007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616059ac71fb0ca638bd58fab9dfee362d6adbfc6df3a01bcaad4a0f037ab5d9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2437732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fa6ab95210fde6fcf12cf2e75ffba519ef30cf7159b34c42e4e07a67369377. 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/QMANG2238640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edf33dba3124220a1e022072bfa02b78ed47ec2f2ae7fe17c4e184501f93aaf. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/US3DF2220007.