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 0xbc00b7d86046507e36a44833985300464328fadf7d57fce7fc405362d530c335. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8a2d47d-5544-4aa2-8d8d-fda692bee20f.json and https://artists.proofprofile.net/proofs/artist/e8a2d47d-5544-4aa2-8d8d-fda692bee20f.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 0xddb8b67f732d398cc4188bcd4e49e8d8b902d000ad9b1e2effb41937bda49517. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GXBAV2531815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ba193524c36bd12d674c9b69c910f5e87e8c9e1788e172fcd171c066681ae9. 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/GXBAV2553488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56595b58ba9da96881c17cdaf2b40f084819a4c256ce22679ae2b92ee8d7e42. 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/SGB502588130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55203fbbbc8c7a383f4c113991815d9a1c0976a519df17728b31b708150c6e18. 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/AEA3A2584859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c0343c493b0eb52455053b805ad91a18f9e627e3bc5ae50f54e210ee5a6a79. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:28:50Z), 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/AEA3A2556819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f64495b4aae2ccfe40f9fdca4376289604692cdbb532db3ad29ecfb324e38d1. 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/AEA3A2543532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ce464c3097dab3a81f96e9009cc4caebf873d85689bed6a12f4b06fe4e3edd. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/AEA3A2528224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538d7dc4849370b4cc2e39af7052950848d304aa061d187d9178ec4c27cfb8cb. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/AEA3A2538825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b61cfa5cc5cb50017019f75f97bfea714cf70c968df6fc4eed7b0276f448cba. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GXBAV2199750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a47b139a0d408d772b32fba9a94c647a625373a9ce2626e16acd1ea6f127010. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QT5M32525328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ac8420cb32a3eed8df3c886a2d257ae1bb18798358573411013318758a6bdf. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:03:53Z), 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/QT5M32557813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff8a124bada5b937f3a88a293c15c4421b0b6151c51a61ee1a4233dad45a914. 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/QT5M32589954.