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 0x38294dd689c338631aa956ce3774e2b704c095c805afde4b2f1fa8b6375cadc5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9fec929-bace-4c24-8c88-991115687816.json and https://artists.proofprofile.net/proofs/artist/a9fec929-bace-4c24-8c88-991115687816.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 0x4dbfe1b3641714cf5fa808b920756ffcec5d9fb778266bc042b90486ef8c37e7. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USL4R2052681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda4e0414fb1840ad87f7a3de7b4dd47e79241d39342ef2cb8cb99ec23ebb2a6. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USL4R2052685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8fd7e2e530cbfc73fb58c78ce3435faafc2eab4146e3e444a851af2d677c67. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USL4R2052686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719cab96ca6c35f6be05a219ad7a5d5e13b32da0d6e79b276e57635491f231ab. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:03:41Z), 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/USL4R2052691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba055485a0813b951fc491986813048a5575d1f48f6c0f19fac7983549730a1. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USL4R2052407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdae0bd7d0410077f8029b7d131e5adf9a956a3f8a1edc60604efcc23936aa4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4R2052416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56452dcc0878154d4bf448eced6d0b0df81c12cea0eeb0559fff56524bb7384f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:56:54Z), 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/USL4R2052417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a5c0a78157b3569bc554823cbf8c9cb1179396f7bd78767df6b298e08beb1c. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/USL4R2052418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0c15b44af4e6786135642415c3b04a18884b14d16f677db25ef27c3e55a3bb. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:15:37Z), 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/USL4R2052419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d63d882683ce56ef8c5f7064403c44295e0bf5da0187b9d4e638f12cc370ca0. 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/USL4R2051347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5520c2262171e0376aa238dcaf6db92364725eaa9957e80100ae28e7f894555e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USL4R2051348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782772cad8443094e7beff26e937bb83213a874faf4833720c6f640502a7695e. 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/USL4R2051353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711bb3c98d5a80016ea647f4f02b1391513679ea5d2dfb9014ad8b2773c4c8da. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:04:20Z), 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/USL4R2051354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9313a1e7041e0b2e786facce52325640043f49a1259643e44ef1ecfaf4135fe0. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/USCGJ2147740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1159091e4cc2c742b25a4b251e5895aab54c5975c62d78d97951b9c148763c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGJ2147742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5cfbb577ea1997973c84025c514f318851123d632c8ea9dd2fdf37fdf02c85. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USCGJ2147744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66999df4427046f98e1b12cbb1fdb6e662fdd7deddfb98b181cbc1868c49de50. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USCGJ2147746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc163bc869be90e42c3a9787d694238da5bcada6110ca68e108fcf4da6695f7fa. 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/TCAHS2393365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef95c8b0af1a6bb8292c1ab6b589bbb845c64fd3ef408a8878234d3e6c2fc29. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ZA7GW2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd48e05a9c06d3700ef74eb541038d9bb0541b5ff60a65f7baf4bb7e4649159. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:48Z), 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/ZA7GW2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda6fc8b65b8e6ff1322ba1178c92b229bea42a220f64276fdaa0d72979ea918. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:05:06Z), 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/ZA7GW2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97fdd56e14c70081d8d05d03c81590c7280190d492f3992f4b19a91ed7ae012. 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/ZA7GW2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd836edc0dfa96a4df3415c4958139fe73ed0ec5eb3021089c465a1f7200c2edd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ZA7GW2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd071ab0e0ca8c9cf9356965402590a48c0acf2793d7411cf7649970d4c1a60a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:55Z), 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/ZA7GW2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45c837880ffdabd434adc450c68c27d33b9315392713135fdae1b4e5eeca9fb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZA7GW2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e759d9b15cd8e97f3504632c204d3550ae6bf5bc067bf5c2d4825464e68916a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ZA7GW2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8644c6f7e27ca45fa684b2e76733c54afce6b2089aaf3aef236ed13f8631f1e6. 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/ZA7GW2300016.