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 0x2207066c1a009105522752b52b6e42408bbcda60f85877c25731fa16460007b4. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7089752b-4625-4f28-8bda-212192cf5700.json and https://artists.proofprofile.net/proofs/artist/7089752b-4625-4f28-8bda-212192cf5700.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Heimwee Noa Limburg / Jeder Huske Heit Zien Kruske
Wer das Heimweh nicht kennt / Eine Insel aus Träumen geboren
Oh My Darling Clementine / Bij Het Laaiend Kampvuur
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 0xf31e06b95697cfc4f37ac06511e9fbcf8d664ec65cc6a238bd26d3373f87e1e7. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/NLA349800079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74848008b539f731576efcb57016696f57be3a0599b4a1bcb241cd3d6a0b21d. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/NLA349800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb181c931681d8a4fa0ff6772555a87fe6a6579c13fd4415e78a60afdfee7b822. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/NLW2R1717487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7069c70ec7467fcd19733d1b6314e98883dd3b006a8ba89dac8d0dd45d9cc0. 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/NLW2R1717489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2563f3ce99f36b97cdb2bc422e01ce9e6fa9e445bea5de737a3fc9196f5d68e. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/NLW2R1708501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11f6e92ae4514fefa03ef6e89e7b5d928343f73ede6e915bd133c7b7a4b1190. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/NLW2R1708504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e88cb78b1d62be1c1c56aabbc879abc76cd7e902968a3997089d9261a34e52. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLG340500174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39947d9f3cf70bd7679b54e587d2e708768c0f0dd7ef3e20c7c3d6c5f45dd1b. 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/NLG340500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199008bf4447a9f1f8b67a964461897ce18807e0760762bd3f027e726eb7f65b. 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/NLG340300218.