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 0xbd50dcee0bdb8ec0b99324e433706086d3d00d9fedd13bcb01fc47a830976023. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65fe4c47-1539-4fe3-9862-b92aef81fb8b.json and https://artists.proofprofile.net/proofs/artist/65fe4c47-1539-4fe3-9862-b92aef81fb8b.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 0x755007e1cc629a3817cc778f16a0684461987bd3c10e62d7e6b80a00684c63bc. 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/USAT29900320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe16e5359cfb8e5779a89d3e6d0073ae392a3ab71d3fa5a53df0c0856feeaa5f. 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/JPC542504724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5622cf1a3a868ba1b4bbfbb60bbc1e56b107c07f49e58a32a41921a2e4b46d06. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPC542504725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c498cbe1b31d89979707c5af4d1aa75f569aeb9ccfad3041c6eb6265665609b. 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/JPC542504726.
And Now I Know What Nothing Is - For Patti Smith
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88eb29716cc3a73087633c5fa49df954a5ee6f22cd28468993ab9b60004d7f8e. 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/JPC542504727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca0a1f1914e98f5c43aae7484f098457468d3c147da5bb56608bb1836bcee3c. 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/JPC542504729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a29623a77b25d6f35620ee9a917486ce7d9433841eba20166ca2a128c26bb3. 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/JPC542504730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2a32905a03cc5e3393b6a7014e4f59e49cc3097e0436431209a9c5e08eb3c8. 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/JPC542504731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707d37bd43e5ba4476fe58d4d31f3ba5d81c1240d78d2e42d93954d22ec1d8ae. 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/JPC542504733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72db361ad31984e47db33557cfb93eae2230c9b7a01247a5680f2fd28aed5d49. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPC542504728.
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 0x880be835e47358c686d6bf6638b7e5823d7357ef9a6d5570cadfb90b6729ae25. 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/JPC542504732.
Peter Gallway and The Real Band: Portland, Maine 1981
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc682f0de36c413c3785d3ced3e8c0b27fd299b6c04477ee7182f96dff27462b1. 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/USRE10700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3903dc4df6a957e28894d7aeffa20070611b187c0149b7581be3a754365f54be. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USRE10700058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f06a32f2e7b4f0033b231a68796bd1c45f9928e6cdd2d3c95827685ebe656b. 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/USRE10700059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50da8357eb1026a9c7be3ba0dfbf181d3ebc2259f79eed5e0a0afadfb52758c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USRE10700060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06a7bd0103cfae1102aed1840bc5e0d2bbf73ffec33721d3608b0b900dd86f5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USRE10700062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029923fc4a0a99ff162fb8b1beacf2353a7e5578bd099ccddb529f810d620111. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USRE10700066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75adee35e493e02e74e49d3b9d2b3bf101f8701fcda83ed3e1868c3224fdbb2d. 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/USRE10700068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d49c0298c179105535975acd895d841f2fe0374948667ab3bdd27e3ae1e35ed. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USRE10700061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186b0c0f1f0a8d71e30bcceb3cccfe65f21c0f0780c46a04ab8298c9b78b17a5. 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/USRE10700063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33be8d3e421ba4e7bd35b3ab3895b388ee369a03104a5d9986f6948a5b1324f. 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/USRE10700064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc1f2a275ac0670a37093e92f80fc6d4f02654d2d756665ae2ed7ed7fda0d3c. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USRE10700065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e79d9dc0faa09da0b61afa4985bf94ba2c8dae29fa665c1a0245e3e4a1c264. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USRE10700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b8be910a21a502d1d8bb95f7bb991eed70a1bbacc86b2edacf7f8d5a08886a. 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/USWB10101926.