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 0x5605a406a9d812c6011f6e8a7a9eb8d7a61e2472ebb81ba0dafa7f54c5bd4bbd. 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/f27c5632-d0b5-46ec-855a-09c2f88b15fa.json and https://artists.proofprofile.net/proofs/artist/f27c5632-d0b5-46ec-855a-09c2f88b15fa.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 0x764b708940cd5c1d1715851bba215e92aef0111fea4801606c96e53aa61227ff. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCJPT2261337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa91827e37dcbb36d171e0d814d100fe2fb179d305c1854ac367f03d089f3870. 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/TCJPT2261343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9367423580537b3c357ff6ba94721fadfa5c3c68e324522d88e6d63dfb81408. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPU2396376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3118f2c1db8f4fcddbb9df224c4f347044850ca5d8a814ce1b6fcb9890cb0710. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCJPV2342250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcaf1a27e52eab43fbed519aa82d8bbd8ee5de165393622441f2e0db1753376. 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/TCJPV2387259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca80c177f43cda6bac7a9e7a694b1fbc341bf509071e6cbd1499e50158e317b4. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/TCJPV2391118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8afa5675eba08721285b62d8acace0781f14601106a482722d02f1c56474dc4. 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/TCJPV2391172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73356d74ec42eca91f674bd485314361c775c7fcbc7b8ac29a48f29d3846dd3. 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/TCJPW2305026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b73a259c1d8e3f3dcc3270b62caa2607ccbd82198bd61b450a271d6287ab1f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/TCJPX2373287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb011bcbfc43434687ec29e6bf70c1623d0a73ca234ce3fb756ccb872d6b6c04. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCJPA2458609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f36b9f2de78818b3e8cf8b8a4fbef28efe45b0c7dd88619e899cad9bd5a33f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPB2492930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304e4b4ab8113e978e712b077a092dd2af101266ec9fd7f95e04533fa2c002b8. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCJPD2552757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec42594e7e1001222e42298476fecadebbd7bb4a63b25db254b1ee8c6c002cd. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCJPE2511944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627e83299119ec142cb35814b13a05cdba04667f293772b69969dd28de2008ce. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCJPE2511947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62382d1e420def47434b9f7dbdbd5db876d7dbd582277487b87bfa29d1c1d12. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCJPE2511948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c2c1526947011d33fcf01f4aa1b4173f028151a29ad8eed027c433705d3d0a. 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/TCJPE2511950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc9c2f92e9f7cb7db9d9fb3e7ecf301a6624aec83ac4a879a01021b2c3e8787. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCJPE2511953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2022f6f1846167eb1388e1bdc7a46b76a25fa68e2980b1cb98020171f2a5bd13. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCJPJ2549198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2c416c66be5242a6ea808ce1d01767dd576bf8a23048a4cf2792319757f7d7. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCJPK2501131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d909daef6d0dbbb829d1fe03d17bfd8c4e453c2d06ad43ecfaf2f3894a7d01. 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/TCJPH1890702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141ec474caf4107613896076e9eff199b1514b05f9e19e0ae1f4386d1b12f381. 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/TCJPB2456489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d6e25df3803686a794a252cbfc9916aec916d40497b056ccf29f2306dcc58a. 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/TCJPZ2471842.