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 0x67a6ebcb43d4b316edd5bacaa8fac6f6e10395b03bb48e096f23d233566d2926. 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/0b217796-6e0f-43a0-a1d0-2a4fb916ea15.json and https://artists.proofprofile.net/proofs/artist/0b217796-6e0f-43a0-a1d0-2a4fb916ea15.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 0xf9bc70efd3c648ac02110eac95d846a7bb263f5bc16f28367a2e522bd753ac5f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USJHJ1603002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb752a6bfd8a208faab6c822e3d2aaec1c4f6ea4112a95c8f042d38206a37818. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USJHJ1603003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988d41e49e8745a033e97afb282e040d5bbe7d1659032d88741fbe82b61bab9c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:25:51Z), 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/USJHJ1603004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ae43cff59f07634e0864387ffbe29fa21a4cbc97b0891e8661b027e50648f2. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:19:37Z), 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/USJHJ1603006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cdeb06ac3f223a5ce7fad0725fae9925459e7f357320c02aa747955df5505b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USJHJ1703001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0b5e3a58f64cab5f2f968344f162a9e6c4bbb236f91491c33c7735d809f8f2. 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/USJHJ1703002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4aa141eb122f49ab4a65ba41a30ff96a6c61342185bb1ec72afaaee3c3ae538. 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/USL4Q1903289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c159dc28ee065910e82057af4f2a96b2a1dab29642d1a0827511eda856b52ef. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:16:15Z), 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/USJHJ2002001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9e863532af196ac24e5f7fb0a35d8e20fb42ff825c5d2cfe5cb6657d44a729. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USJHJ2002003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3062fb987c3e814a4e248c88efd98d4a7fa4a2a358cba39dc2758b09d2311508. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USJHJ2002002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9e863532af196ac24e5f7fb0a35d8e20fb42ff825c5d2cfe5cb6657d44a729. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USJHJ2002003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d640fbe3fa1823197929370147218e871d5a13f307f8b37864be037ae4ee7b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USJHJ2002004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bf293339ce39c24160c5f3a3e1e3b075bf446b118b56bcd2623577f2c69f70. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:28:50Z), 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/USJHJ2002006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e95c31b39f0d4f136ee7ac4a3eb070b87d19ce76f4315d94ddca227825bcb83. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USJHJ2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e95c31b39f0d4f136ee7ac4a3eb070b87d19ce76f4315d94ddca227825bcb83. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USJHJ2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8d52889e6c4bc3e83305b3e4940e482109a7f7c1707e36eb88b9a46285a731. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USJHJ2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232b6aab073920983f2c5885d2b933b7e4a33420a814f8673ca8d2e0347acc37. 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/USJHJ2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8549e24b6c3a98bc71cf0fa1ad8ebb3c6ec57adc81b9b1cb8ee145866bec1e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USJHJ2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77eaebc833d634d2022fd8e00064e15e93c4028ee9d6143156d6e8571a43ded. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:09:02Z), 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/USJHJ2400023.