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 0x3b3d3b943d4087620c2c426fad226d96afe56b8e7feed175a794ed865859caff. 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/ce3f6c41-6be2-440a-86db-7e025f5433ca.json and https://artists.proofprofile.net/proofs/artist/ce3f6c41-6be2-440a-86db-7e025f5433ca.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 0xd4c1700f6f9dcf85f5d8c3c2741da9aa6aa69b9ff412fe189de3588a999d6381. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES47F2300628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173dd8ecbd0e9cb95bd18d932a758855e2ab6ca3b7c4a0aad33963f51119b645. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES47F2300630.
Fernando de Noronha (Remix Arrochadeira)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a9cc25100166c1fe38e70455370bdd2046982fc689dfd09a89ddefabd915e0. 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/ES47F2300909.
Ela Me Engana Dizendo (Remix Arrochadeira)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d6ec9aa5ee2a5b7d99b2585ef2cd78b69388a8b884532a9337c7fa82e275bf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES47F2300910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61fa065a517c5f1dd1fe244907130dcb68513c088f5eb6d3595c3ad961281d6. 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/ES47F2300911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b9e7d63576d7c7ffb676e7142110d3c6abebc8f2205882d3addb3650940e92. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ES47F2300912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674e790cbeba9d3b222fb072758bcaeed0983fd273b530c836056c8597ee8d3e. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:32:33Z), 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/ES47F2300915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028ee08317778ca3cab2a5eb12ef2e68fbea0589da8c025315b27a980c536a01. 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/BC0902400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cac1d6d7aac5a840183e67cab74e2529365502c1e0b4bade281f2e642a41fd. 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/ES47F2401127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42af14daf14ee5d014c2c65ec68ff9e49625cb52f43ee3e5fdfc9970a682adfa. 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/ES47F2401189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c69f60b6fce876df8618f355ef95116845fb98ef798f1a19a23693a60e5e32. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BKJ7K2500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdb955b80d90bff97da9856b4fbe29bfb0aa9b3c7654242d38b660ed3e84951. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BKJ7K2500119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997fb43d63ef3740b37ff1c4dd36f6e039f158ce968ebd873c5802ebfcde5eeb. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/BKJ7K2500215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0c947d48345cf388545423f1e2fef5db01ada78e02e0fa5c059148aa651ac1. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:43:34Z), 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/ESA112585208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d30fc5a51f04081afd59d791cf7dcbb9c6b965e5a5ea15f648fd4b80fec67da. 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/BKJ7K2500113.