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 0x6f376ecd0c51839f6ece83a532dbdad920ab2a04f5a43a8c6685f5de2fe229d1. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8960ed6e-0617-4e2c-98c9-e391196bdcee.json and https://artists.proofprofile.net/proofs/artist/8960ed6e-0617-4e2c-98c9-e391196bdcee.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 0xc6be6498e0ab45d6d937d1dd1b4097145eedadca40185a62d529b5e58725b737. 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/DGA0M2335202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e0752aa955677cddd2f39429bd17f5ce45b4f0741754779bea33d172b71aad. 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/DGA0M2335201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4133e7849791c366b3fdd40176a2cdb73f35314c66b559e2cc78badcfbe1fb20. 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/DGA0M2335203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe279da82445a371ac2b539a4dc851a382ac38f722c9abd6d0765632d5771eb0f. 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/DEQ022391890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e03184acf0179235209a4d6c3493b975dc57636ca51ee7473f6c65e73c23880. 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/CA5KR2122674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778c812c50cce291ec8fdb6cde218811d8f14ca69a4da65a36df8f4bb27f87e3. 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/UKU932290025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfafff5678f38d162806c1a3d280583281458b94e158aa4994a5f03035d6b01. 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/UKU932290027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d943710b3fff17bb116561a51fb3238e9a5d0597f26b6bcdb507f837b48e587. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/UKU932290028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dadc3c3231539b57291f1b9b1f40c09183788d4f21fdcc537a171e66edf91c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/UKU932290029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd79adb4c9480821a52775b7fd9791f125c2ab9f49c534181e91dbcb1ffa86e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UKU932290031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708d179cfd39e9ee8baea8ecf60132eb342054730569286054fa205a9aabadbc. 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/UKU932290032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0534354e5cc4abf61d5f36661929a569ea41e191d30a51de7229b54f0a5a083. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKU932290033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce68e83d3da6d68275ed31937281329030dd3b22584b2fdc9b3265429c538c6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UKU932290035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97ee6058d3ff1f0183cca7a3b228a4e875525ee92a222db83b0c616b1ed1c60. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/UKU932290036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f36f5f76533cb510fcd49a37c798956d848e43e2f2fee9e61a6dc43d8683cbc. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/UKU932290034.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484fb65f7aa82688d127c2610c978bea93771105ad95bb610a24375748be5109. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DEQ022390452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a7c1727f4b19dce063af2ceffb15fe2bfbbd73fa31584ba0cc8275596cc3e7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEQ022011226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad72012940129606cbb13055eb701d80370bfb11fc48b71e819382ad0faca39f. 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/CA5KR2117758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2927377194475f17cbed6ddc44ddd254113bc181265f6a9c38979a6e2f6b5e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2117760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff91fc1b611b423fa3a48f5f4f2a1b83622d89dbc892d919c0487b13d8976d39. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2117761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2399707d7bebf4b757a0bbf0f60565daa06eb3efc4a26096720cd3625914e0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEAR41976340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe477cbfb6141f7b64a4500bce44d0fff25ea4f69a96abda2ec8f6fb2b6fc42eb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEAR41980931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802bd10fdc49b37f2c1696395a02d20c7274e7127511c230b9666076b874ab81. 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/NLCK41066543.