thumb|The Quebe Sisters Band (4854598924) The Quebe Sisters are an American swing revival band based in Dallas, Texas, who perform a mix of progressive western swing, jazz-influenced swing, country, T
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 0xb9394fd5fb645fa78695b7a37ae84889c52adc651b7c24d6d74f8ad90a89e2f4. 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/b76a5ffb-0db2-4870-b064-c63c279becf4.json and https://artists.proofprofile.net/proofs/artist/b76a5ffb-0db2-4870-b064-c63c279becf4.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 0xbd50e7a40f479dc91b585c32075137c30a8cdbc8a28ae12d76841bffcdc8733f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USZZ50702701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63994845b49fa07f80c27313b81f8090ca4f7d1eacbb4018247cd5acfd22a7b8. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USZZ50702712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5652a9233844ee64f9a8f4af05523c0e262126cbe7158695cdd5b6550ce067. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/USZZ51303401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb026fd6caccd89f583bfb1cd11068a874ff12b55f83091977ae8fada34240995. 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/USZZ51303407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f245eed8ee62cb8995949300ebf348d4825b330641bfea5385e12f0a709d4f9. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USZZ51303408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7641e8b4c7f0949453ec68e4c54cc6f8d490c5fc503345b8a6963d9e40b0df. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USZZ51303411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30126dfac126d32e2499567908c9f13fbffdd3ad024f756283a8d9c38e53eab. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/USZZ51303412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b04a3e5b0f9c1eb6d0485d6e7924c8a11538449cc26f98031a5648da1104103. 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/US2761992777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb0ce5eb8aeb429ec57295eff042a8dfd2ad31958bdcf3e39f047235eeab143. 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/US2761992779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a8205ae0fb90654cf4cf285a34099121f5b92f98bd247da124ca272346cf08. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/US2761992782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56286e93bcd3164b57293a4159741af3309214601168172a407ef1dbb41951f2. 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/USUM71608026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213aca090eb2117d24fc145974b93dc9da061730e1e063bcda1f542795b44106. 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/USUM71608031.