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 0xd18fff493f7b4c89cdb057ede752bea546d7e90d933f1f42cb3933654e8ce56f. 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/59ec1c04-1149-4210-b120-ebfbeae0ff35.json and https://artists.proofprofile.net/proofs/artist/59ec1c04-1149-4210-b120-ebfbeae0ff35.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 0x51477130eb211f4c0a4d5a27914b0ba9fbdd90754e6f2d8e681cf4bb76896f84. 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/DELJ81963720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537b120898d494c122e4afeb999276697629f87f3d99dd4970bfeb484e6cfe9f. 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/DELJ81963722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ff9a4fa07eb7420bf7d312c2998bf3536f3be63d23ef8f56019b8721c54df1. 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/DELJ81963723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107c95072341fbd9591b19509ab7263356c5e9205ef31f85d2cb113a95cbd371. 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/DELJ81963727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd274a0c2c7e660197d7786fe9f52f66c33456d4932a4049a14302a9dbc141d. 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/DELJ81963728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37e17a03a48512a2e8d1a86830206932135942aa6a8b7bfab07c17ab85403f4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DELJ81963721.
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 0xdd583e719840129d7b4ee38a9cfd74435135297a579b2eb0586482bb769e235c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DELJ81963724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee8e4c873d1429d933d05f0d0893c9a5c5af1e026ad9835a77ddb00fdc6df23. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DELJ81963725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54c0220f092132c6796bf96a8e646b216cb308f43211cdc359b00716147d291. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DELJ81963726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30f407b59d7932ebb92fe70bab9e24955b69fbe40b7e92d07f0f15f998891dc. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/DEZC62167423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1673774b59b1f71626f9cbf94a486ec7b52e9881d178e0fc7b90dc8e0aaded. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEZC62167421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d46e1d48c1bbebd5de970347f991cb478d62960e8780426e0f04d4df88acac. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:21Z), 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/QZTB32326186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf477fe51c2f537301f29c4a8fd93be4b96672ff5b7a7bb6bda57f8a1920331. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:03:47Z), 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/QZWFL2410563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2262649c54b05820db3cb5d50d95adbde1b3c559d2c336914b6c5f844d515c. 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/DELJ82009512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3990951e3847f529b943ca90b2232fcf04de06e88c72110181e343e99c3adbab. 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/DELJ82009515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e42d537092e86411fe565fcbcbca94579ee1e68d98ca7427649daaeaea9468b. 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/DELJ82009520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d521de9d4a9210512103619b3b560bef1d3e18dd0ebd07c037908cb5636a24. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DELJ82009502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07f1996d8e9ceee69b903adf5ebd49337579894afe1ebaf818574aace5f9ce6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DELJ82009509.