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 0x5ce00450a353c603ecb5f35b06f14e7b362361f44f53f475d893508c71b867d3. 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/8c760a15-635b-4bd9-a47f-d5f80f3388ed.json and https://artists.proofprofile.net/proofs/artist/8c760a15-635b-4bd9-a47f-d5f80f3388ed.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 0xd6c1beaf2e4d0ba04e522d166e1848e0c077045bf1aee10c10b4c68310f0bc9a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/TCAFP2166920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa755ec4120bc1d24716ca6fc3a291ce7b368a7c5320e7bc1ab8ddd05176ac456. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEH742175927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33141081603e54f28ccff4e6eaa770cba3fec0b97e9e419ead17e07c14ad75d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAU2559074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb63381bc8385b95743a326acfc5334cbf45ce43b64986deb8d33f04546a4925. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAGD2286660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ec428dab72fe8b8a40e6f68acaefa1c204a08435a1633cc9294459e912319c. 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/TCAGR2256228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3112c2c49d5ab0137a377a99d6a089dc2ef2d939a5efeb43d6fcc11f10a56c1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAGU2334079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5c43a6409daaf02668487ec0255b9a5d3eb35669af4140599d6c815f1f28ab. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAGW2364666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5256105b69fa16ba0a6dc4dca4cfe2eac484cc8e94fe711732875445fd12ac. 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/TCAHD2319178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f700bd0b98a2b08f9564a8fb1230f48e4ff92688b1bed2a778215e0902f74d. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/US83Z2354674.
Inner Zone (Dj Nick Ross & Mudboy Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30428c28093feb73e9e10d09932985d6593df61d346e4c7af47971d10d85fc31. 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/TCAHY2433759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2033dc3daf4846c201d31e20699788eaec13c12bcc726f993905cb01d2cc9b7. 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/US83Z2476271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2d765fd36eb39c0a6c1571f4e47147fd0187a8e9501c4da3b34a33226138f2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US83Z2473756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaecbd0e8c3b0c67e34de5843f4001380f0958815fd377b158851e770e6f483. 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/US83Z2314788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f7d93366825d9157ba31b8b0da6fd5605fa5fa15c62abd12eb623d34380f0e. 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/TCAIZ2492184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002e67198bd53eadfe3cf855fad7a663837fd55be254715881dc3413b64f56c8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US83Z2426499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f7c1eb30236da399e0e3d520555b5df8ae75a7d43c02c295afb5a17df5d0a3. 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/QZHN72585147.