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 0x45ebaf17d7b2e1e19bd223374d43e8ac8990d097995b59409414de9b97b73bbe. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e6fa7e4-673b-4839-b8f2-3bd646e6fbd4.json and https://artists.proofprofile.net/proofs/artist/3e6fa7e4-673b-4839-b8f2-3bd646e6fbd4.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 0x478b6e060e69190dcfda964e6a4a177f3a263f66b0a218b46d588a27462d72a5. 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/QZ5FA2050623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e0ab2e2b1ed2be3ed79f2759ffbf08fa4c4defddb867d29c57cff815d9aa3b. 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/QZ5FA2050625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5d763c96f5ec7ccf4970bdfd5d2dea784b8be10f6aa56c772cb1232605cb04. 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/USSM12109646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd952be70dc17ce9e860bf53cae58ed19cb76a79f9e24148e6aa475e6883f40dd. 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/QZ5FA2050621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfeb4ffce1f3cf52bf67e7fa34dec7e44ea8d867d8cd02c9e45c0cdc08c8424d. 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/QZ5FA2050622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478b6e060e69190dcfda964e6a4a177f3a263f66b0a218b46d588a27462d72a5. 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/QZ5FA2050623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21096bdb6fd2d0016d98d628e2f1166aa832efc7b896fbea4dabde0d14c0cd1e. 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/QZ5FA2050624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e0ab2e2b1ed2be3ed79f2759ffbf08fa4c4defddb867d29c57cff815d9aa3b. 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/QZ5FA2050625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5cf557f2fbb387c81fc5606ed1d46c76ef9b768bfe52cceecce4f6588b2448. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZ5FA2050626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba7c7d9102a03a13d0923e88642a9ba7c95c8cab7e0ca96f37aec248a0df647. 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/QZ5FA2050627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cece4e4430f7cdee817006556ccee98ea732cd45a93a90a66025c1ebb7286af. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZMEN2410947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8268ea3d873b92c934db655bcd6af4b894fd9f23caadf9a4bae2cb68eefcdbe. 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/QZ5FA2050542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ce5761227cc47a635e91d38e5cef36876c1ec6e9b6838d7bf05741e29372fe. 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/QZ5FA2050518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf9c17072a13f1229577382560ba9b815fea5f05da3c9eb2aee338667040e7b. 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/QZ5FA2050489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14c82153a36ca2db666bd41f71f46b1ae984d9ce2ce1461f5858f2653b757cd. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZ5FA2050488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020596c034eef5c85dc8d9d031252b7f8a0290467dd042e8dfeb03289d8c8c58. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZ5FA2050492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a923e2d1df53628f5e8ce648a3ecc8a631ef993b17afa2f4c6ea50f1ed5096. 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/QZ5FA2050490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b3546c71104c97108157d57ae05f8f5e583f3e6b2b4a46eefe394ed23247ab. 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/QZ5FA2050491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be6bf7e7db25dc9df45fb6f613e923434242dfd7aa0c8b982e47a7b6370957a. 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/QZ5FA2050487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47172889b17556300d7fa63040ae94f1a05927c08bac5ba2b908f80abe8e3ab6. 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/AUGBT2211023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d86f67ee40a5a965a2f4410ee7dbfd7c359018f3e33b1466d186ae0dc6cc4d. 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/AUGBT2211024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fbe4a400a2314f08ff064d3cc380183f4523b97491811c4b28ad665fe18160. 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/AUGBT2211025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7f6ef45f9e161268632ba39d6a78f72500382c5dc430589b0f17084ea4306b. 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/AUGBT2211026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35cd3a3bf6991a3039274f4d9e519514879ce917c7202f2f6d1927046b9721e. 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/QZFYX2290846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a8b68a2c7069b489ca2fe22d78f2bba894653743eefc0a001a629bfc7b7e00. 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/QZTAS2126622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6484d627e4196578fe560f61510eb33b51d7e717216c74fcaaf645a097f2be. 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/QZHPJ2213987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bee926d81614ef540f5b8fac0d5e20679a8519474b856dbd3d0a4cec98ad42. 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/AUMEV2252845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088c44df638ba73cdac3a1dab85ac49dff178a6dd636a4a995d0c9b35be8deeb. 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/QZFZ62252877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7e2d0b8457f106ef8066a2acbaf3339ca462d83351b8694610e249bc01d46d. 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/QZFZ22280527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdcdf5c66f2721fe61cb66239a5bcd9eda374be9afb2bfa3a63b8b8ae9db67c. 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/AUGBT2211035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3394edf22a34577db4676ce0e9b090a56f7b1374603d0f0ce2e5f214404db9. 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/QZHN82163189.