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 0xc27cb5f46a23f256c991bdc8088ab61871efaa52a40c9b561d4ef0a89ea3aedf. 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/11fd4de2-2524-42fb-a1fe-fb0f0a21918a.json and https://artists.proofprofile.net/proofs/artist/11fd4de2-2524-42fb-a1fe-fb0f0a21918a.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 0x65d272e7298164a2b94f27315551bb8e06a71f3faf3adac7280847463b580318. 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/QZHN42275721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb656558e4c29b441c531b51879accb133d2824c3a1a439eb56df0c7cdff3a7. 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/QZHN42275724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e1279f8642e338277c516edb623b5c40345b9500d626ec9151b579f7f0a56f. 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/QZHN42275725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcede913fbd56e3ccbafa8df3ad1a5a493f071501278f228b8a52ac2c4205d91a. 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/QZHN42275729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98911a4f1825a0f17755e7252c069e15cf6b9e9de668d7b2b6a3ba3504494e1. 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/QZHN42275730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81a19cec312f270ef0003ed2aa436ddf608256763f11889eb63b07cc023016c. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZHN42275722.
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 0xae44a6af5fc26f36b83d996c8568f9abed00af383d1bef8e4f0597ab1b33abd0. 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/QZHN42275723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf938fa2f1ed09e6f5e5054484eff9c0980a68bfbb25862fd292345c1e84831a7. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZHN42275726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898910e3b03a385a3c543ca51b275ced4f5134bef4c474123eccf2f972e02e74. 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/QZHN42275727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa6ddff209b1ba9de449ff66a3bbdeaaea7cd183ebe994edddc0d9db7098c9b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZHN42275728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd863eede1429b409cc5c3261508d6c7702306e3bc80a9d6fbeede1c4b45063b3. 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/QZHN42275731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fd46db01e51f8ad1b3d7723bb2a12963ea79d94e52a762925f96ec5b8385a2. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZHN42275732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f17fdb5fd7ffb34e7b2ab0055ec69a424051f7eefd16a122b24bbb785e6b4b1. 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/QZNWS2370347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02385e5b476933718fa77424d47c526041e3505d0d0883f89b7b0fd461b0b37. 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/QZNWS2370351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1deeb7803af7effff2b29b3e6544b2ee0e44d9b47c0c139c62f33a68f47d377a. 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/QZNWS2370346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8d385179d20358f4b787b244d372c8656b60d70c1932e93e48a04f6badd636. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZNWS2370352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b328702b7565752b5812ae545ba33842dbe4fc305361c313d921c823b209b51. 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/QZNWS2370353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834bac77174ebdddec567d6983268de643899349552a748e75afafb7a3bd33b9. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZNWS2370356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f5726d592ba090762c58b26010827a5d5710ae992dd4e09c03649e602660d2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPJ32295689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870cdf1814a701ac1c4b96327ec804a35f27173fc1711d36c0da16db7ce43da0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZPJ32348199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b749e32043929a54c8857a89fb2b3c740fc6dd42f889922bc76bf732b5da2a6. 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/QZPJ32348200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a88b9795a3400863fe36d19c23cab0e6cead6984dc44ba5d509a3f9d1f2ffe. 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/QZPJ32348201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608db97f96fdd6061edd7bcbab5fd630fec4a749a3ac8d2215513b3b8b811c2f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:35:04Z), 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/QZPJ32348202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d65074c513cd65f612d6d75483c296fca5875ffe88fc3c55c88faad25a108e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:26:30Z), 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/QZPJ32348206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371d461fc59cfdf88285189ba9697d50194d50bd02715b46aeab49f278a42811. 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/QZPJ32348207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df36706095546e32d3fdd82f07c2294f859f99022d26ee48c0e39a3994be53c. 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/QZPJ32348208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf699985699e22b5172f8dade753a2164cb26946d41e2315f96ac9e13a31127ef. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:33:48Z), 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/QZPJ32348203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f96df77156f4bcc006dde52a6fd03f128fde96101277b0aa17b977efff9221. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZPJ32348205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd365a0781281dc24e2d78d0d8dacfa46162f804776b41503d0cde6c2a9e8b603. 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/QZTAY2404707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510f0bf8b890cbfac2cf1f6d897a3f5c0fe46efa793df14cc137c306a59d16ec. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTAY2404708.