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 0x371a80289ce4497aa4ec146b0076993c07f0232f168ed1ac1dca4b6ae2abb46e. 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/fac0447c-3908-47d5-829b-3a0028e49341.json and https://artists.proofprofile.net/proofs/artist/fac0447c-3908-47d5-829b-3a0028e49341.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 0x39abb56df7b0bb6bd052a0e8824e5d3f6694993ca6807e2e86543a615fdfeaf7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZFYX1949649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56714bc83583c1e6627e80004c20c28509be51aada285407efa3a16403ddb8f. 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/NLJ2H1500171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df9fbc41b8545c4ad4ce1cb6dea350cd8b91fcf57d85c6dff10d5303c603beb. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLJ2H1500172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471efde80571cf7fbc441aa0b6fc294724b9a2209d63e645f293f79a0f8cd346. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLJ2H1500173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81966e378b15c885a55ccc76dbeeea054d3f81adab056e72ef3ba71446db2791. 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/NLJ2H1500174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349e02a5abf24e3d0a7e1e659482f518e66fa100d9a7ccfbfcb7375ceb5576d6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NLJ2H1500176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8732875ce3800f0f12ba3c659912da6306f43c8b55e906d117d1e29d18dbb820. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLJ2H2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59613753527bbdc2d33295a5ab42dd27c6e864984f720156dabf5b572e24b4f7. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/NLJ2H2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0335734db7a99f6e73c838d130349d5e98178a3ac8a57c3e39c735ee52ada8e7. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/NLJ2H2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e38e15bdf99375f52f43eb9272c723cb6023087bb2f5042dc2f5508c4e1ae8. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/NLJ2H2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53590f723a0b8049237a4c9713dcf8db4c1937969ceb2b822c0585a2fa59936. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/NLJ2H2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192814ccd0cabc496a2db538544a7f2d1b18b6873c290d1288bb12a4125f332c. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/NLJ2H2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaba8c493ae486b42853385ecc5ee2225b9c22c9a2c9b704351ade5b210803a1. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/NLJ2H2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6046ca94e4c00d1fde9bbe6fcbe2c43e8af446e4585892370f1a601b44ce1f3b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/NLJ2H2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6e7d2c943955e547144476ed57d2b56d269b2e572b732385fbb11d9cf04ebc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLJ2H2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cf40103d6e1fc3dac33c922a8e5cef3a474c79de13a39989a9cc23b9cf81ed. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/NLJ2H2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaba8c493ae486b42853385ecc5ee2225b9c22c9a2c9b704351ade5b210803a1. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/NLJ2H2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde78608823b55b451649ee008c53522fd9016a0a76ff2a0de01662926e256156. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/NLJ2H2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2945549a640551444ddf2c595ee016c09fb4c62f7a2c90424dc0f9ee14864b24. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NLJ2H2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe800d57aa1a62cca8ec63e13bd3601631fee4d0235168ced5474cf9bb490b746. 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/NLJ2H2400010.
Het Wordt Niet Beter (feat. Hadess & Matero)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14eb5a8b8cebcbe001295514c7ef7c2997a32f6ae7e13d050c341c5e0fa550e1. 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/NLJ2H1500217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14eb5a8b8cebcbe001295514c7ef7c2997a32f6ae7e13d050c341c5e0fa550e1. 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/NLJ2H1500217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22515a26fef6c129b6b22ad5fb69622cd4eea927a90ebe5a481f4a6ec1ce7083. 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/NLJ2H2200009.