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 0x3d9cd7e8d5f4974c8fae2274044c8f4b46f5a1d30850a6c335fdd0346bd5dbe5. 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/f8955344-e3b7-4f21-8eb8-1822ebf5bdbc.json and https://artists.proofprofile.net/proofs/artist/f8955344-e3b7-4f21-8eb8-1822ebf5bdbc.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 0x86bd34030f9163102cc025f8cb1056dc6ae5b4c95edbeefd4b9c28927d2ed6ee. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMZ92160430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e6bf759b8e16b9fb2850f4e2fae18254d025aec077f970d728a4fd7bca21ad. 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/QZMZ92160433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a0f25a1ad15e2a77f0161317a8f552a507ef9a6a41011647a4c0c957a34f1b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMZ92160436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684180cf6f1ae0391df66f80f93000e4e217866620dc09b0fa0f2471aa7000ce. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMZ92160440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121a38b534842ebff06cc19280a86c6d48e56725ec641d611686557738a957e7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHZ42138891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ff817807d0048ceb10dfc7de0a7d26b2311b28c3bd45354f8ebbdd3b9ed87d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHZ42138896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5426ca39719f0033af26436394191894dab9a11cc2c2d83b98bb5aac553c7752. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZHZ42138898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8452e4662c3a89d14eb7a5b010da884854c41dc27c75d9a378b99f6c235d971e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZMZ92102263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a803e2a78faecfa9c4f0f4b617033a91d2f3efa9aa1fec9d32f1078ce9e712. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMZ92102264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb396aa145e60db3bb23e6484014cff8536821bc4f46dbe6a4d4d37443fa3d7. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZMZ92102265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255871e0ef244af0fa8d8d49d812f2d734adc83911f5f2a7541c7b8fe52ac554. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMZ92102266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097aa493b87c851ae7abeb64a0a244e755fe9e987eb506372afdee95d376cdeb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZMZ92102267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5cb84a5650125bc60af5ce1884ef7506ff7b7a593ed5905a5d373b9d5b28b1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMZ92102268.
Recuerdo de Amor - Tengo una Pena en el Alma - Tirano Amor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383048e1e6f848cbc54ef69a3bf517e6f2d02d9d837b35cda5e1a6b9e1fc7d1e. 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/QZMZ92102269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662fb829d5b55733f7ad9bdc8c42d960d1411ecbb5baa76a26d4933e1d4dc876. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZNJX2413904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c061def3f4ff57c81991f670ffe24674fee6fdf44cd4f1237f6638038225e4a. 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/QZNJX2413907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357a549eeb02289e7b188daf51d1670fecd0993911e5c378b88c654c43916f78. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZW9K2462150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe26c2bc5df4d313b5714184b20d340a122c8abc0db5cb7df4414203ffbc16d3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZW9K2462081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c3c3b9ea43f0fe1ce9b6ebf9ab43b3c8c6773a727f6d2bf309bcd4b3cc3381. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZW9K2462084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d465be4be01526829e91499d632adcf4824f604480bbdbacfa7918b9e396202. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZW9K2485812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffad6870616b2b10f8bc94aa9495235c681f6f591d744c45cd2d2bb92296a15c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZW9K2485813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad59e7bc9354dc8ec59f0f739b3228d1c39df34831cc34cf7e8fdd769f2815f. 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/QZW9K2485815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c3166397da2f8c94a8e0153390d83a006c6f443acb4ef786760418077a9875. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZW9K2485818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5674ef6b1b0bad5aa97e1db58e711be37d8184afac220a0e7fa78993736e325c. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZW9K2485819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4825f64d791f394bffd3ca012813b1f1beabf4f4574b71c4ebaa8948c6a9c50e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZW9L2402736.