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 0xbdf1153b986446db47294353ac6143c6e67f0511cbe48b33a5897bbbe38e1779. 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/d78c0d51-23e0-43ea-ad82-bc3614af3b71.json and https://artists.proofprofile.net/proofs/artist/d78c0d51-23e0-43ea-ad82-bc3614af3b71.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 0xe26ab9e1bcab2190b419eae8a0504c8471dca4468fdeab6e2346115e14c487f0. 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/FR2X42110188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349228e1e84ae362e82492b5661da0f71990326c79da2694572a92f0fbb63906. 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/DGA072163831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a24ba9cc462595eecb3ab74181749176aac5785bbdcb29b389f5b160188fd0. 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/FR2X42110189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0c6dff19080a6f0cc5f870a0edb4e9b1c1ab47f7fa3e1f9d942a06469e736f. 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/FR2X42110190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8600304ebaa0b92219135f2929def2ae0a5d0534d84f38780ee56eebbf757829. 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/DGA072150655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab15c4697ccbb3a8611ee42800e7803557fd66598197fd9520afbc9ba11cf39. 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/FR2X42110191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e7acbd7a3c206e66f195c590e90e26cff4927f7f5edd2e904fe1e3f0230a2e. 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/FR2X42110192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c6e1c6791698b60fc5d019783c7d7f0f8168b6b3487a8dad66d874548d543. 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/FR2X42110193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadbd6874912dae8c2af11a698bc79ab5231bbd1f9b5b1680423af7af7352889. 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/FR2X42110194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee1ef06ef48cfc84673288728fe032febeb5c51a61eab851ece625887688bb8. 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/FR2X42110195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38350dd3823117d366d25df5d72632949b5fb42c91ddc525b219d65e76f45b1. 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/FR2X42110196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afed1afd6aa3409750ac55ed23c397ad98dc2265a4d30de292f3c37cb44bc37. 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/FR2X42110197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b827e63caf9b7fe484628ecaae0ee4890b8624d92de80d7c2868082eab3c9c3. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/UKQNV2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6417b9c463a9de2f07de794c3e9c313cf73da12e8e3d8a95776d3557f6563e. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/UKQNV2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdfc65cc57f97d16ddec7ae1220d31eb6b3d7d524b4eade513380af4dd733b2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/UKQNV2300034.
Soft Guitar at Night so Not to Wake Anyone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2253fa5a27327510bb42381d6c9310d0c161ca25ece2f31b0aca81ea101e866. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAIK2443719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99489472a3b6ff2bbbae9f1f218aa250e209e424f176c0ebcb786e74d44d054a. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/TCAIK2443738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ae4f6c905653bd99c970e8f38c7f7161d6f27d736f11e692bfb659d640802b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GX7T22500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2ef352a79c069d51f2f98ff34464c4e3bd10ef2ef470f5aacdd51b0524e383. 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/GB9TP2000795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe510e88822fb0365c4e10ec1322300f25f76d1aa472a949d25830ff300a36dc9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/UK4CK1300450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccb2d399142640d1f7966986ac68a57d64ef4f3dcb2730b60b4be9c61e904c1. 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/UK4CK1300451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29677a9f3dfddff02f96a9d87e2c7e060d1319e40b61f3a9a203c3f085030913. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/UK4CK1300452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c832d9b0a1652fc2dc293226a846a946ddfca70b2ac51d49783f8a8065e33ac. 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/UK4CK1300453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5fc13da284e86bcb8a9664b733129c0226d76990e02d1e27c467b3d02afc11. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/UK4CK1300454.