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 0xe9576073a705348f4153b31e7af0163db6947b6fbe86410bec79726b4a59ad4d. 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/a2cee611-ee80-41f2-8b4b-4c68d9857938.json and https://artists.proofprofile.net/proofs/artist/a2cee611-ee80-41f2-8b4b-4c68d9857938.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 0x913a0add9eab4f1694e2c68cc0de4d18e35d377b614174b87840e1bc354561ee. 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/US7VG2265714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4352304d916d4258df3b0140f75f921ffbcaf17b9468efc32ba82579e2cc490f. 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/QZNJX2211927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbae3a5d41d0f5badd18fdcaa2bef1c27e1a222a76b4b5e2b51cd1414cdfd2e2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZW9L2281478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172a897e9050c055d9f6568525e197c1b0655fe1e17a961313bf47102d23571c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZW9M2207269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12b5dc6f3e1ffdf84c1907f98075d9917316e4ba8da5a682ec78cc066df5f82. 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/QZ5AB2341046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d2594e669fb76208d4f2a432a44c61792fc1c552983e4e9b2417146e217698. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US7VG2397790.
Mi Deuda - En Mi Getsemaní - Fue por Amor (Mashup)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05b8513655f8cfeac08bf7f6c4a8b146a1014c8930ff52c4e8c2b2877f520b9. 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/QZNJW2371496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e374abaa39b86cf1639a99f68c6135baa3886ec726c986aa4179cb16e353f15. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:16:48Z), 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/QZNJY2344742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222ba8da16de26e7fbfd34646e175a111ae3910610e6f2dd8397a80160be3db4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJY2326425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d74fd48dce25c634dc9f3421d68fa60f06a1693e8db021665c374e37668654. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/US7VG2469983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5df4fe2e9f23ba08e59365fae4218c79273707925a52f912dc152cae6676dad. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:23:51Z), 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/QZ5AB2439413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d0f48abc1aaa50bc3e55970819ae5e719bb77ac88a6890f417ff845b0fce04. 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/QZNJV2409941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6aaa23a09840b3dfaa0eea702c7ff9f96253289896d7a4a43a9ea51ca3e88c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJW2479952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda74f94030996170d12d2db258dd316be62e4bdf98e307c44f8248fc681151dd. 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/QZNJW2479953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59158af8c51be17da0d424818fd775893144542730b96d9c7f3e0edd5bfa70b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZMZ92544487.
Nuestra Esperanza (Ven Oh Santo Espíritu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f022d5ade6587ae894ef47366fc8dfa1ccb3c0eb01a953c31156e78540451a. 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/QZNJW2548619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73dc4c0256b0dc940dd2443fd0f3148f61cc9a50161c34918633453f70acfb0. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZNJW2548929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1230c98648f6453fb8de72d1050f9907c7ffce988852d187dded4f3aefc4ce05. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:51:48Z), 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/QZNJW2548930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb39d2cc77c8936793403f412742b8f66c1a487dba8c80f82d3d6a078d010a7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJW2548931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64ec657fccab75da1e1f4ca7dc33cbdb2439c9c03aef2ded48cbfb04b4ebcac. 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/QZNJW2548932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56807f85ff45fa31a6a2005fb8dd1896d6661a391533d6c5de7cbb499eb03a6d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZNJW2548933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51c021058f759fba44aab21a23e01ca18148d3a3e40d749fd285c65933d5e1c. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:32Z), 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/QZNJW2548934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95ceb7d71ee37bf0d53659810376947752d884b9e392597b33b67f1fd80fd16. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNJW2548935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d829c0faf67fa40dce9aa704a11bc36115216a38226d00300c8d49846d0868a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:24:34Z), 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/QZNJW2548938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1577e636c8af4443198f5526693b376638e93c228e773dfad9b6e5a9b15cc5c7. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNJW2548939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37525cb95fe0bcdbad9e0cbeed6cc0a339523d0fd16a6f61bd20e2a4e24cad4b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJX2525045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f2a12fa94fd7f8bcaa274da6eeb1ee7f2ce3bf59d5be0e16071a114401636f. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZNJZ2590951.