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 0x1c1ea00483f76a17710544d30d16f19e81092c52dc15c47d38c2469179c26692. 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/f202a24a-f925-4227-9f9f-49e22c945d5a.json and https://artists.proofprofile.net/proofs/artist/f202a24a-f925-4227-9f9f-49e22c945d5a.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 0x48c7a583b74226442c5b4c5eee7087dcdee6c4382048fd67bc1f9ea5059c10f7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZZEB2417158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3a92d86c86a3f4f00809d410ff41716316a36b88213d4bfbf844089401db75. 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/PTRO11900258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5115f84a464da2c826dd9588d3a087bd44e9516fd76f0e18454f3073aa3009d9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2312286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11a2a2c1ccd95e8d906e3179a08042059680f8c78a59b310f9de55fb0112f43. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2312288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3bdcc06268bb04c9dedecf24663703e649a4146c6f360499db7597cb60d4b9. 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/ES71G2312289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3216301b8d70104aa665ad050dcf2ef127f3a394533b0a75d06705a2c0267c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2236347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e74cab8b03b81a44ee3040fdf664c07cb8cc3b52698bc8a6139ad22e252520. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G2301664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d56793187a962212fcc93dad036b058700707868a9f617ba8569e67e3b75b92. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2312291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dfc55920de2a7c9642c09e8b30dcddd97518f5f365ede37d8835efbeaabec9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2312292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99b3a454dab00982768540d815fa0826f0e282a2326e110ae44677d9d7fcd0c. 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/ES71G2309696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5115f84a464da2c826dd9588d3a087bd44e9516fd76f0e18454f3073aa3009d9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2312286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11a2a2c1ccd95e8d906e3179a08042059680f8c78a59b310f9de55fb0112f43. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:35:06Z), 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/ES71G2312288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3bdcc06268bb04c9dedecf24663703e649a4146c6f360499db7597cb60d4b9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2312289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3216301b8d70104aa665ad050dcf2ef127f3a394533b0a75d06705a2c0267c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2236347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d325dc6c1a90c9dcab34a078f47fc456b398ec9af6aa84af3f866f0146d348. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2330322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e74cab8b03b81a44ee3040fdf664c07cb8cc3b52698bc8a6139ad22e252520. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2301664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f22d1a852e3cb1951ee11389d12a919d6d8db5446d948f230fa5649bd4bf8e7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ES71G2330320.