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 0x3ed392b2fa28737781b2039fd7d390805e1ecd8bff9faf4f180169ccd5f544b9. 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/25be6f88-7196-40b4-8035-d52f5d7993e4.json and https://artists.proofprofile.net/proofs/artist/25be6f88-7196-40b4-8035-d52f5d7993e4.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 0x0959f28ead4370c41ea6fb842b7b095c4bd6b9ca7bd26a661eee89aee0b24f20. 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/QZTVM2357744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfcf2d2b8552912b484108956fee8678cbce0a485f654606eab7e97adf0ff5c. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZNJZ2346495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71848a3e0280715df3f7b4100f035c11daaa6072bd8405382fff09747cbac602. 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/QZTVM2357745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d61a789fdf940750d8477e78304e52d2de7a4b05001a5e21ee72b75c16d6f7b. 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/QZTVM2357746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d02a748ee3baa3054b73e9f85f92b37d0103e03b993ebb9243a3bf9b62f702. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJZ2372133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd1484d2a71e51c01f364aeed1f72aea2942a785e3142cf8f50ef5e29115366. 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/QZTVM2357747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0044d4f758ebe3d3919d817a26cdb9f9c5625af796c5d4e3366b6cacdc393266. 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/QZTVM2357748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2a9ba2f15d8e1d76913cd1697e6b4bdaaf48d45a54adee761b64f2dd1a49b4. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZTVM2357749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4e1524b38d3b125d5de2a097d1dd35e6da5d2d62d65299f2fcc67796ccf0bd. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTVM2357750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5549e66b2023ba39e5c1924de71913128909ebf32d56d3052d5105a826dc9318. 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/QZTVM2357751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac588a3bc9786b739e9530a884eec8b87768828d098e92c527ddf983922320cd. 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/QZTVM2357752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552529e0912c9cd35e7eb630b54562dfdce26322aa49a291f711de3d567a15ee. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZTVM2357753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d6f9e06fffa863bfbed08bfbb707c71dd7fcd71c9c0e0da8251e8506d8c5e5. 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/QZNJX2124122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda56b02e634bc5ad095eacf3930d1e27447a05c5a034ed62b0227e6e4f049e5f. 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/QM7282411632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6651a50d2e9ed1fe5a7b0bcc1a8fd32e6be288bd388529407cb326881cfc9c7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM7282411648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc319224128c27aab0a3b0bb47b49fb94630e63b138122ab4eb23801a2351e9a9. 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/QM7282411646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6fc47a2f6db46ac6e21869ed0a0970b75503629df4c15a304bcf3601da2ac8. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZNJW2061472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5256f54f4ec0ad2f127c0ca8338c079b852da07d65f6da705822f7ec63790cb0. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USL4R2122318.