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 0x134cd606b7b98c77e4ed492bfdc5823f20223cb1a1e9b6d21e810c9dc1c391d2. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96761040-402b-413e-9aa6-82ab2a99f179.json and https://artists.proofprofile.net/proofs/artist/96761040-402b-413e-9aa6-82ab2a99f179.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 0x8d5886e00bf64ef078b7ec6553c32962c389ff49b87163ab623b603155a379bb. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZMEP2237877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350a4f3bf9341ec7fef760668b637e30a93216d1669efb265589a2cf308cf2f2. 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/QZHNB2225337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9fa5fd73e1ffac51eeb2a2ff69e78a92b11e3929054da111a1228559ca4a7d. 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/QZK6Q2321193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcc8cde131ffb44e66944ca2b4925920a66478619b0ef1d4bab8700649d1086. 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/QZK6Q2321194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa679ac274aee9680fb3577a4ffa80bd68edf21bd6374d20f648df3a904916972. 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/QZK6Q2321197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf16d8c89db67b6d16d00875fc859a16b4d8f07cf80d0c09672fe5721795c693. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZK6Q2321203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de426d475b0a7d1049cd220302e5fa9bb5f355ae7670b729794ad2ff0c45f7f. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZK6Q2321209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde71a007079b239e29c540bc309a7897bb301962ccfdfcc7997b04a8808403c8. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZK6Q2321210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2b23f49aaae052767e3f047b2442318999aacd515d4f78db123412960ce1b4. 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/QZTAS2400818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087cbdbd3714b4611bebe74b61a3f4c80605ffac73ad8c409067b1b123145e21. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTAS2400820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4638d1876885809125d9eb669fc40b557db18ea1a9a0e37ffc2f452e6431763. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZTAS2400823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb0264ae11329680c33765b467f410d218a4dd1f75c7f138c50371e3409e305. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZTAS2400824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f3445fbb8d5624f2edd10fcd82dfeb3d4d2fb35dfef65c644cdd46bba0bdb4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZTAS2400827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaf0012db9102f4f1a90ef6257d94520ce667b2e827025f92b0b6af5643bb5c. 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/QZTAS2400828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7bc63d46ab649990d8b405d289ab1c802b0033fdc2151f3799c70eaed6c5a1. 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/QZK6L2167555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343f1bb058db0f8b58a9c9b5a1cc2acedc5203b1c35b1ba7b05175b4e2400326. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZK6L2167556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6655d6fdd972364ef8d4273f0af938b028942371c272d76252c7cc1c93db6b79. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZK6L2167557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eb81df91436ce4d11d3ca25fc2ea1198604abd9db5fc0c05308bb692891779. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZK6L2167558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60be8fda702aac9265155d34c3934ed6e589f714c64b9b3f2be2121a021fd62. 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/QZK6L2167559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a1593e173aa88d789cf8fd575ed0f87bc9875ee55dc0e88667d83a4cda7e86. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZK6L2167560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ab31371866c22a1b90eaf52b178dbad8a7572ad64568101fa8b06b058cab14. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZK6L2167561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9cc20442376745765f997c01fda6c527326c771ca40a26e5e8f079fdb10752. 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/QZK6L2167562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7790af6b00fd50c985ba73a91c6c3fa029c60f3dd45c7a023c5c49d45babaa. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZK6L2167565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93f67a55edcd95b1af2c3a7a37eacf6971b6b1694935e9cadfeb2c21485a927. 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/QZK6L2167566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44df632a5aa8617c8fee6143b5ed62a666605d579d7e9d539ac4d6f4b8888fd. 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/QZK6L2167567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7898fd764876a007861c5055b2c02be7ff108e30f05d98d318b80c2e7e84886d. 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/QZK6L2167568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fc1fe812c7d255c72ce4578b1f16260ae736ec11e3f013269462408a87f03f. 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/QZWFH2360457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5263611c271f2633f78cec0d10dca307a41edf9926af1e5cdc0ff72c2cf11f57. 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/QZWFH2360458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672283aef8af94b038b50c1947798ec743cfd3438f2bd09fcf315bcda0cce878. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZWFH2360459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdf21d20ffa98b4f160cb128c728a577ca57babb8a4636110c731f80a0dd925. 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/QZWFH2360460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf905bf438d835dde8acc93eb26aff1f72be835339f4d594423a178712529fd87. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZWFH2360462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588faaed9d5bd80870a45bb3992fca581a13f8e4d57165bf245111b5628029d5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZWFH2360463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51bcb907e9de47e16122e133eb269d0046a272bc3ebdc271a2b485104b44765. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZTB62360823.