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 0xf3aaac686fa8ed82d1bd63a6d59cf46eaba65c185ce7bb325c308321e12940ff. 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/c436eb92-56be-48e1-825d-39d8a4c25260.json and https://artists.proofprofile.net/proofs/artist/c436eb92-56be-48e1-825d-39d8a4c25260.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 0xc62df8db12b35fd4db804b71a27fee62c79411e8afbb0cb3b77760c42c13bbbb. 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/FRR642300359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08aedda984146db9bc2392180cd13599601470f7fb1e9826a7c16acdc96f4173. 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/FXR142300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa07f1bf8196fc44c1e9064fe8497b37b6d635d946e61da3a3b25af50f4dd18b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FXR142400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31999ee76d968416b4f74f2d05579e2b49dba62b7cf90ac9c810c71a3ecedefc. 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/FXR142300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31999ee76d968416b4f74f2d05579e2b49dba62b7cf90ac9c810c71a3ecedefc. 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/FXR142300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572eae5d65413ae841ce85e6c35193af3839069de4ba800c6d52a07ee8529bfc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FXR142400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054e5cc5de478c888840258ec8917a07127102d76aafb410500174cb0f0568b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXR142400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4feb38c8366de28c632df7e7e7ca5720b0d82def5c95fc3280086d55800b4b4f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXR142400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96eb501371ce4f3ed82cdcdb81b708f522bf39a51d3b10cf7287d885eb5b240d. 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/FXR142400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837ef88cebf2eed75aaf6dbbb9bb695830a33c22dac068965fab5e6268e87611. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXR142400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016d278a086c7a216b34c29d8c8b49a34fb6f6380f2221629cab086367c610b2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FXR142400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29415db1fd91884781ffee60b47effd7b7dedd85c0221ceaeecdb6e2befcbb50. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FXR142400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb49fbf2592027a609be1071cadf88387051e72654e9eb577ee05cb4940598f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXR142400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4329ecc04409a0d1671dce3d996002eb15a94453a593430d219ab7f3443fff. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FXR142400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572eae5d65413ae841ce85e6c35193af3839069de4ba800c6d52a07ee8529bfc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXR142400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a10abac11e2d776a0629e815f148c6fc82be5ec1473b16587bdb4a85c5b826f. 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/FXR142400097.