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 0xd6e16fc9b87bcbd9abd2168722a737eebbc2ee8073d5b7c0c4d91094e6657a3e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55d971d5-87f2-4635-b78d-dec08e42fc5c.json and https://artists.proofprofile.net/proofs/artist/55d971d5-87f2-4635-b78d-dec08e42fc5c.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 0xf97afde9b6c233cf2acb8c4025ca5daec6d270d23bcb7b3c0f53c03a92acd7bc. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/EG1010100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0b6aa208dc22c148ab339a51163e996db5623f0cd1edf83c0b491cdec6095c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/EG1010100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3371a4091d2296102c1e651757359d99bdc2e829d694ec781abaa3f6e5cdaa3e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/EG1010100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9655ea0516fc02d8a2a0b97335f1357ebb9cfe5b29cff3cc6d15aa0dac91b40e. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/GBSMU8248220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982b4141dd21ccc70f5844d98334835bacbac5d421f95904b8917dad402c41b2. 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/EGA090800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0e1e591bf55f31856c6c3fb817eb8de118893521b71a54a2f712edf31e5b38. 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/EGA090800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa782ac7cdf3bf0218b055b3f8c5f6dcbd365dd2d02ce3de3a54b04f271646564. 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/EGA090800206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45110fee38fe7d3acb5ef898e94a6205fd8479491c156366d851fdf1e00a01b9. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/EGA090800209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe050220ebfabe1a02f21b2793cd7241be4b28ba0954d9ba80dda3f1bb1698d57. 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/EGA090800210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60645dadec7af9381877182c863ab09cafab7f34e56e6a96b09fc025e071c2e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/EGA090800211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f36af640e45a11235d3574982cf8ed6cae7f0a508ebe2fe173d4cc6b0f7aa96. 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/FR6V82263668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f073dd0c980ae3e8056bfda85a209f4519e76b09c675bddbbe6ec4a7551a134. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR96X1523332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a596fa36776f62914105abb6e4873018eb17ee6e1e265205f93c8a5de72f0de. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AEA141906141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e01bd515f05bb033f8faf6941d81c57ba959d3781c4aef98756227be60706bd. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/AEA141906144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a85f449a2977e79862444ce0591ce8d155cfb92225069b13b42e0a88ae161b. 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/AEA141906138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2702b44e2eae1756b94256e39536a286109d0648d4963e710669f80f32fd9c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AEA141906136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d34d009f3e6d83f8e7ffda57aa04b6addc43ec12cbf657189c8a1f05eded9a. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QM6MZ2110965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6a863fb543ce079eba57731c40726f9b1e353501e51b42ab2c2ae7416ff0a0. 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/QMDA62155652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c1fbf4f6aabb0fc5caa47b0a8c5ae1539783b96bfc30e9330a59e758d03649. 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/QM4TX2203763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0130499c15a4f77a32461be26dff30e9d981ca6e7922ffddebbe09f5ba4a24. 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/QM6MZ2279890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9799a4840c13a2c84d9747e913a43b7ab4fbb0676baadaa604c8104830e4758. 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/QMDA62216055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab76fa1d9d18f54f576edf2aac226d0e554ea8b6a97ddf117d498484db41858. 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/QMDA72230213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f5dcf95b0462d3cc991129a2517f4a8497bf4b02a17509d6dc2b2326969c1d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/DGA092219710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37861f9f6b412f17076c3b7bfd7cdab1bb8e87cd4b2c2e3da571d95d9d96b100. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM7282338643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7557af0f330dac2feef07e2be88b4f89207b896b77e0f6b43d231277cfdae5. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QMDA62319317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4e1f1d9b301107ca7de49f4489312155b8ce8a00b01ea0f5ec76e406eb124c. 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/QM4TW2442138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4ec31c3947d221164e89adce607d2c1324d22e20aaf887926adb6db3e5b8c0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR6V82251189.