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 0x1ad1359d84247727cdeca80ce7ceeb1d74bf4b211359e5ef291a9e618fa0875a. 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/49c71ca0-7cfd-459c-84c0-1620b330c2ad.json and https://artists.proofprofile.net/proofs/artist/49c71ca0-7cfd-459c-84c0-1620b330c2ad.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 0xcba7caad193a30c7107db7f34fc3288a7a4922ef89b38639dabf73173af8a436. 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/QZW9L2495156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b9cb739f76706d59f0d6f6a6c99af516c5769440adfcdeeafd370e365e8bee. 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/QZW9L2495157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caba27545bb814d1855d517cdee27ad4919709830e6267e4da03ef2ecf731a5. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZW9L2495158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749a52fefac9e4fdfcc6d07d5cc12d1f98d09921c180e7ac247c28e29cb80920. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZ5AB2339005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f289c6f18bce1d305fa873d281f5162a72d2bc1128359f95c8b5e3eba98271. 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/SGW502547336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c7532d98e9cea4689b31ca9b47d63112ae5bdf5321ba2e24f3c7490c2697c5. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZMZ92515022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc56eb66aaa165400161a582e62ed1f1fa597685c75af8a18c7687bc3e9a09c. 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/QZGLS2548277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7229ccd0a9011d12eea29a8d84e0f6a24d1dd32530de2c0b433a094533d83ed6. 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/QZGLM2560991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62def3d27a33a4df7cdade63b80ad053283dd6ab65d52da4008ea22cafb44e6. 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/QZGLM2511314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3477db4deef8f1182544d370b6c85a7999504ecb8b5ec6f29a2b5b081a2fb1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BKTTS2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf4d47419cb5c7aae672cc4795507b4b7f37a39b2a22491ac02b5b75cad2820. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZW9M2436155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a18872a7adf30799bf23288666ab383d39287634ee12a628cd78b69deb56cf. 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/AEA3A2211108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc18466bb2bfebcafc77bdce2d70e99077a14643366bb648504687cd1a59607. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFM2462099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455dbfb901763cadbe01198715bf6071d63777f3617010f744591b6c031b7af1. 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/ESA112448081.
Toma Colocadinha (feat. Escama Reels, EOO Magnata & DDL 071)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ce0873bda1091e819a84b4e833980e4bb1893d78531a7059569781a799f377. 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/ESA112446782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3952fed078bae835d03b38c373782a4d98b8179e96a39cd48cd4e6381d825c8b. 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/ESA112446378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e41597a8281f51c7ec8f9489955a7d602f69bddb86ff12d4644d232ae79cfcb. 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/ESA112445876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae301c11adbe9761f5ba0f4ee645bea12336c942ed22201e167ac37f57d1bcb3. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BKTTS2400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcb3a93782083c8373a19479f121a825067bb102fb1e60e14afe5b48e067f0c. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/BKM0K2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d54e6222f2f992f7f7ad60fd6446df8192975dd6019224011230075ad00427. 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/QZGLS2450117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5bea8a67560899801adde62e94f3fb1ffaa94918f35f9e88bec0941089e55a. 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/QZ5AB2493342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68ae839ecb10cf01ef5c8a7bced71e94e17d944ccff642dd8c197e8a5e54122. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US7VG2438384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163f1465be7b4aea2d2e290ae25b0be59d3ad8e3ae59c13933ced2fc8cf680bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9K2321481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18475219d16d28374fc6cf171c070c19396120194610196043a3706b51593f5. 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/BCB8K2300047.
Vou Dançar Pelada (feat. Danado do Recife)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171c7fefdfda4e3144d7930e76395762f7a2da41c16ad02600d1409514d9ad6e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ESA112316431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4b2001794d11afacabfd184ed347093218526d5c648bd7fa0b84f6fc1b035f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJV2511193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1b6c51db59c743f272f1ab2d979a3d9469cf8f03f826ed3704fa1ac19e97f6. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZTPX2430263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5815cc8135a17bb983e7858558063e7d3418b9449856a9975a15f4566d6886. 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/QZW9K2416566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd80495789ebd429e0a231b918e6b9f66fde4680147371a00338ed72bcbba15. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US7VG2577665.