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 0x7a77e2f1027fb7979bbe7001299f14c38de725e9c504b8095d6ac7d6d4daccb4. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/932154c1-11b6-4c1e-90ab-b22c27ac02d0.json and https://artists.proofprofile.net/proofs/artist/932154c1-11b6-4c1e-90ab-b22c27ac02d0.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 0xe6e6afe8b143c924b5a2da860dc1c73fbbd084a4ef2465b8a7bfe813bc4881bd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3FC2509629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dbee6237a3917261cc5cb876756f7be0b74cb662f1ffdd216818ea030f98fc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3FD2537435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ad0503f21a1deec936aafe3ec744119c916023dcc4bcab1e6cad0d348456cd. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QT3FD2541837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0a5be1de65f12779ba9cd5e701f295066a2e3323e50d71d251ce44710f387e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3FD2541835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7345d5dfdc0d0c3a6196fc4eeeb7c1c10aa912322035c84a8ca04f3cbda9eef6. 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/QT3FD2541832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e8824d7dd45632740a13d9cb477a6c4efc1fd1b20506930684401a062eb3db. 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/QT3FD2545405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d4f3b3abcbb7a76b6725dfbfd3bdcca01dd3e1a9c1c9e1187d6cfec3d60523. 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/QT3FE2590087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ce4effdd12c215c8ca9a5a3166f195608c07915bb39144749d11bb2e436f35. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QT3FE2587691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2aba3a84a3e7a778b30fdd8ef7b2d66dd2020c2e6584e581176a840ffb1f989. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QT3FF2594465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5303e630f6f8c3ec3026a00420b9ca929020fc4581c6f966b6bfc6d404924a16. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3FF2598131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a76b86c8e42e4c01c09cabcceff086113ab9d48d1bbf4782c7c5d7b449e7d7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3FF2598128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3efea079f758afa408cd16eabde7c26fc48a10b57a60e2388691624f6d846b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3FF2594477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa330139f7d23f7099594e398beacd5b31860c8dcdaa24217e6308297f2be030. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3FG2595350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cd852a485dd758247b97e3c723b97fa44890b9a187030bd0c1d0955bb5a59d. 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/QT3FH2594209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1cf267b31694f090ec2f745349b81971c2a2ce9302e26c887fd30ca84add54. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3FH2594238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa241632cc8e4d4fada9a63976836ce304d828ceaedee8fb58e430bf8ea5cd988. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT6E62539178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3962137ba1271299b01da0d3f6fa70bea65905bf615dece3dcbb06910f751552. 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/QT6E62540085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35eb8294039dda26354c0e4037f5b6606bd5cf5dce9f3b3f8a4fc67f5d0db89. 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/QT6E62539409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6f7285655bb9038369b6989ced8b4e1e7bf9aad95a053e9a1f7f7a9f6e767f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT6E62539537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f59348d1c15a294c7affc054a161a7a8faa009d33e8bc3d16ba8542d30c78a. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QT6E62539397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa064d78f817ac52a50ea68e316e30a31f727e219e744815eacb58b91ebd2ea46. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QT6E72562225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec509b570d583cdb182a2bc9fdba9e3ce3766e9401cae43a6a7692897227b59f. 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/QT6E72567486.