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 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 0x52991bed3934a80f8fedfaba752c16917c2562dcce69a6c66a9516b0b33eaed2. 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/e546121f-a69a-44a2-b7d5-51dd6850f763.json and https://artists.proofprofile.net/proofs/artist/e546121f-a69a-44a2-b7d5-51dd6850f763.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 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 0x10390c77b77cbd5d966846d7d0fa63eef477865e007d48b4cf183f1b0f0fe79f. 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/QZDFP1979456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85bd04cd6109dc40938c0d6d4691c31e761cb00ac987d125cbaf7d31b833398. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZDFP1979458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc879221bcefdd217fba85bd140f8f7b43d7a9ca830b6f69fab83a582269a645e. 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/SE6SA2114280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6791465c81ae6ce96f952f8bb719080d310f22ec7a8ead788b1e6b8ac26a48a. 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/SE6SA2114281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6e474be7efd2c3c9665082a72dbff670fca9c6ed3b273ef26ae7a2c20131fb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE6SA2114282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b5be642a6fa1246708c6123525fdb56c9ffdc4cb803064e3471eec253f8e3c. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/SE6SA2114283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee2c4a81f94d0c8772efc8b5a022525984f896d51e52cf22c57f1080827e8b7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE6SA2114284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e53f92870a9428f42bce724a1b58f166c880c00bc9dbe10003ff787464a761a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE6SA2114285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0330d1e7e218c72c15e0eaaeed2b03e76ee2c3e8c610d1d603fff9688384c8bd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE6SA2114286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d56dd4e9639e745f9454c97e3a802c2d7667f1cb1152bf8ea925ea58ac0510c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/SE6SA2114287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bed30255dbd4e01b2e16a0413bd3a29e8392ad3b89c2473bb5e29d2f79687a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE6SA2114289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fb94e3606c42374daed037cad256b4d1819180d52f8ebda5f8a140ff102177. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE6SA2114292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e03ed05e48e828516b29edc1a4e117c9216e61871e0aaf5ddc6d1ffb489fcd. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/SE6I32114428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c28d14e2a725e42311601580dddcde37db0fec7157ae130260de16a8a613a80. 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/SE6I32114429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce49d03fccede3fea34c41f3e3eb47b4498552c436532d251b4e27016ef184f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE6I32114430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79734d2086714f71ad3eedd0d870c84ad23732292acca096684ba1c06132ed66. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SE6I32114431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b0fa9cc93e306e265112b3c73e9564f63515b663b20a28c553ae102ac8d9f2. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/SE6I32114432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfbec8513720ebe779c2428fcf61ff0c3b6166af75b6ae496c34aef21411603. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/SE6I32114433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0242d9c2287a1010d145a67a29357098c0f67db185cff527c3665926c88eba1c. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/SE6I32114434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf233ac0ece9e624a7df814f7b3e192cddefd3b27031d838945cf3467cd24bd5e. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/SE6I32114437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79734d2086714f71ad3eedd0d870c84ad23732292acca096684ba1c06132ed66. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/SE6I32114431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfbec8513720ebe779c2428fcf61ff0c3b6166af75b6ae496c34aef21411603. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/SE6I32114433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0242d9c2287a1010d145a67a29357098c0f67db185cff527c3665926c88eba1c. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/SE6I32114434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e06589fc6b7edb62895322494f5fceb4932274e0993c70e63706f12008e26f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/SE6I32114436.