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 0xd0affd15442a92e39776e11b043c0ef02467fa9977d7914cd4d31c5ca480d425. 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/d512fdd5-3aba-42a5-9383-460697b721fb.json and https://artists.proofprofile.net/proofs/artist/d512fdd5-3aba-42a5-9383-460697b721fb.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 0x25a894e742834b5cd8d9b7ecd7fbf3a99dbe865fc5b997fc0db2d56fd44028ab. 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/ZBO4F2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aad4b38d09e2a64c2057fa598c013d9d77632870b42da931ecd13ae5b1321a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZBO4F2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc470586bad5b5ac337bde275912e3f631b78c71d924c63f7f3313594a2d6fcc9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZBO4F2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0358b2ab129bbd44078bfde7b962a2d1f0c32fcd15359719560eef47ee5430b. 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/ZBO4F2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f5cbcc8431d882e76dc491080adad7d2166436eb41f3135d0fce9c26e54987. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZBO4F2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fe26cad28592ad088c01819970b179955acb49c84058ab173ddb574ffc04b1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZBO4F2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5889c1a90172e229e62152348e7265aa10c3cba547c7950bb1037f3ead84e44. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZBO4F2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774870ab8b992cb790eee884f10f4b36a986e6d6602592a9e4ebf971df50a5c9. 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/QZWDW2430893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d201df65f2bb505abe0b89c53758c5550f196f5462ad82bd095ecc788dc6d9. 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/QZWDW2471482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5a02cb3721ce8da69b23863fda50eeeb86de717d8a1721eb0c70d110e78a58. 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/QZWDW2471483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81567770c5c118873b94137fd5051981a9de0168e100b18219f6810d82935c39. 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/QZTAW2479879.
Angisho’vele (feat. DJ Njabsta, Novatron, Cowboii & Carter IV)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab322f581736798fd1bf6be59e4805ed4806734c4fc8e50915104dab7d601d7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA56E2527088.
Sibalande (feat. Mr Nation Thingz, Mellow & Sleazy & Makhekhe Jr)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead6df6c3e07a95e5d141a85cea7ad13140bbb0cc2ac30cd678d292843fcdaf3. 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/ZA56E2527089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4294d05d701de62b7ad7afb1eca29d3faef09848dde161a963fc64705ae1ab. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ZBO4F2300011.
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 0xb1941ed16032fb40281409f90e39f73e9d861a97f6b910b5c1f785fcfc71b091. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ZBO4F2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8ce6c9294966154f6ea62213d9746e81847312c1c15e58324184b7bc4fd54f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZWDW2471476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e38463d51a2cb19d59af994e466d8b66c8901d0f51c9821709369f1d15795b1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZWDW2471480.