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 0xbe0e8533da0fed909006812ff9572116bf33a76c48169e919d633ec12d759c39. 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/7179fd33-9ae2-4404-8eee-cc6e941b42e2.json and https://artists.proofprofile.net/proofs/artist/7179fd33-9ae2-4404-8eee-cc6e941b42e2.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 0x4e04068de85a96672b1a86a29277e45c9f87b7e0b5523cb6d6fe5f137559bd48. 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/ZZOPM2232643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ef3fa48d916cf51a41a224dd9b344be5d7f57eb79f8e8bbbfffb1f69e6e73f. 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/ZZOPM2110405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237ed17744b22448790a47b76b516d6a88d85c87717f09688d90cb97c2d9b0f2. 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/ZZOPM2104903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0084a8343ebb16bdca31501f4c13320074cfee25b3708d03ed9f4c4a0a2e2bd7. 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/ZZOPM2115968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca453d7b63a240bf3eebf09dc6384f97769ecde8b6d109b3d45a287ef1296bfe. 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/ZZOPM2237983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5f76340b76e793e3d41e37b47513b45f9e95eb1b8d9b834a4e0d9b910bf96c. 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/ZZOPM2108934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d886713ee74d86700179cb8af55676d850bc6d444adef381f49de7298826184. 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/QZFZ72164651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5c8d6b7b6d9dc44fab48e94963c95b198f0d7490b24e112148b5f323fbdd21. 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/QZDA72010173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7eab9bc7512d08be92de6a4d568ea3fc5a3923d0be61dfa2b0d1734c6c5eb4b. 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/ZZOPM2237064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcbefca3072c7087cf3c2f9d432fd6783d15a97cffe52cb47998d214c558b49. 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/QM4TW2370379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10456e2b57c229b834ae35dc9b873bcfa328357937e66d26fa1dc951aef5268. 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/ZZOPM2236474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e04068de85a96672b1a86a29277e45c9f87b7e0b5523cb6d6fe5f137559bd48. 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/ZZOPM2232643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16177e2deac8b0d81c801b998c1bb1f74472f5e1dca279b902681c991b9279c3. 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/ZZOPM2236477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcbdb40db5aa289455261d9293223fe2975a3f56dedb67e0257ed9b54a7a700. 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/ZZOPM2236475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28588290d8571ce7c04ab56bc853c4287ac284457b334ab4bdb2a6e24b612f5. 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/ZZOPM2225349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46ff29c0b63b7cc4f72a0dadddeeffd3e94cfb1fc5cf322a9a26330c351f079. 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/ZZOPM2221501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e9b840d1b498b6329d79fa019593cd7ffb5869245784dfb1e86f80b3f57d85. 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/ZZOPM2120343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2c7d3165c0dce8cb3dd8f6f7283aa58f935d76c835e29e9b1ae99db01942a9. 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/ZZOPM2106035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71de0e5b940b3522ede46f60e4cb25f6768f0c37d93e3f93ea299260c8013d08. 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/ESA032037101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2d3af9c45c5efc1a5389fff82a3cacafcc8a9485610ae7cf10785775617319. 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/ESA032017301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e99d0764feadd0becfbedd56bd3646ff73161c84f68075b9b697a42d89bdba. 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/ESA032013301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dc266de75f5fbb2e216fe6725ea6379ddeff1009731a3bc38fd3ff2a6c9bc1. 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/QZHNB1904464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f323babe1478fce055bc14e166a230d8feaca783200ccd718ee142960273b0. 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/ESA031807002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa185321fdcb87b518c41f3ef351f4ee31f2b4a442e934e538752559e2594fdc0. 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/ESA031807001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ee872024083a7a0514590f2e529d815329800fe819b11ae68d6c54d550ac69. 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/QM4TW2397107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ee872024083a7a0514590f2e529d815329800fe819b11ae68d6c54d550ac69. 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/QM4TW2397107.