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 0x8912b027151084e5c4b6fcd00c17751ca587a0f52aa6ec5e8f86046b8efab14b. 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/8d0fb182-f488-410c-af78-229cb7d35c49.json and https://artists.proofprofile.net/proofs/artist/8d0fb182-f488-410c-af78-229cb7d35c49.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 0x7098955046bed58268501367106511312d8247d4c7d97cda33deef01fa9606c3. 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/QM6MZ2279700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92eafc1cc5fbeaf11717fff466b4e9a9bdb6a2a11a7399649aecee0dc50bbd8. 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/GBKQU2344739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df7b2f1a933cbc8d473cd9b7c7a6499ff81bdc407073bb4c512517135ed51cc. 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/GBKQU2362102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3342c69c4c17ceb7956f37b01d9b0cbd0ba4524a275e86952a71c8e79c72e3. 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/GBKQU2353293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ef5ae6cc92f0dec547983101147e42e5c63fd698c376c77f66ffb2562cc0b1. 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/QMDA72239135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3935250e7d38ad7ad5f27d04708f5965e69fc9ca298dd1abcdc765cffcc45c. 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/DEH742443335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f11b6be52b10183241e6842d19841c5833cc04a95cb3b3381572f44e21bd82. 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/DEH742442890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46db3b2d7eaf4faa670eb8097eddc86637c4fb227faafde7020fe14eb5a1045. 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/DEH742439500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc7267f9289c5be3ad6b3d895381903819a484e957ea71411650e4e193e306d. 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/DEH742436600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe324d390647d9743ff4e0b01597092242e734144fa1a105807541f5ca7c11437. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEH742433645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1316ea039251df2955c7e422881598396c1031bbacd4002f405c0533c3a614d. 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/DEH742429721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7e6ce8d1e60ccea542eb0c224d45b1962c393a2cfd7f43903bceb73225049d. 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/DEH742427686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a68f0fb66bd5190d14e79bac6a9de76f975150744a1ebd9f8b9eb2c936b4c38. 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/DEH742425644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f52663d1912003436fa4525938821c676364af2420f9e1c6a8be263597fe5c. 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/DEH742420820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58a92fb93ad428c296391200210310ca89ffbfdb630cc2995a93f4474e513a9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEH742416068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3558cb807bf9a4767e44447239cd42971f50593cd415f5a725490bb146743479. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEH742414638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038b93317231fff9c35e0ec2a39fb4182eecf13356b9212d074a861b586d59c6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEH742409527.