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 0x6175a4b42eafd94751b765c800c2c68786d5e726ea471ab963ae24a5444161f9. 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/054a3b09-a9c7-4d88-83da-ab71a2ef3e4d.json and https://artists.proofprofile.net/proofs/artist/054a3b09-a9c7-4d88-83da-ab71a2ef3e4d.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 0xcd5e4c1182cfadd44f55610c1e479ae5185b917dcca6f0f4db6797852ea18c1e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:08Z), 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/NLE871318301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa45bf786bdb76edd09cacff451e79575f7cbc98d61226db63838a7f6726123. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:08:15Z), 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/NLE871419302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd4a7f573d80279dd55db85d3201ffcd1be2e5f0b9138b5d8efa59b9851f978. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLE871410701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86610ad0ffdf38b894527a6b9ce74becdd4a51c94ef073e3b4392274f142086a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLE871419304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09706ae862882830c659082cdeac96bd4d9942b7fd5bec89eecd9065cba9cc38. 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/NLE871180601.
Beesten Van De Nacht (Official Sensation Waailand Anthem)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6579b29b6bcd67b49c61693548652060471ba4dda05427b9be8d6d3a9e1cd0. 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/NLE871910900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7c128754bee00e1ea40b144f03e6f49603215e5e3f92207326f7f3bbc6e5bb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLE871937700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7effbe3f0bb1b8476672a1cc0066c2877b2ed5d8111a1fdd8bc0e24ea672c7ea. 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/NLE872115101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a7a011aee60c029e6308b12bb6e85b951a1686556e2337ec2aa6ea9bf1c3f1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:41:46Z), 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/NLE872174101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4c523d47694f765ff63b2fe35dfd86c97531d1b7914dcc0ba6ddf4fca9fe0b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLE872224801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6fbb5d29c292921a47ca2e89ef83ae102eefc4e5ec600e13168ace46ba859e. 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/NLE872307601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7c128754bee00e1ea40b144f03e6f49603215e5e3f92207326f7f3bbc6e5bb. 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/NLE871937700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f569e4c8cc9baef59a902e6d1db6f8bca2173d6a6aa320154c10c9b5ebcd38. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLE872310501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6ec2b03c1e90a7f7d2843a3895c49664c426ebf1355edf1c00e271247064db. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NLE872301701.
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