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 0xf09afed63d725e96a9486038b96217c5f36697254366c5ab9c339a269463d6d5. 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/0b86aceb-1b8b-4d7f-9655-cb3674baa075.json and https://artists.proofprofile.net/proofs/artist/0b86aceb-1b8b-4d7f-9655-cb3674baa075.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I'd Like to Teach the World to Sing (feat. Leona)
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 0xf26bbfa5d34b63a8504356d82b72db4f7074b0af36741197635038c733afa8a1. 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/NLC241300086.
Celebrate Tina by Berget Lewis Live at the Parkroad Studio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fcccbd855d74776d67a93a669b0c3c811cb99a8c6d36c3766c94f545e1d2ca. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/NLA6A2300038.
Sven Hammond Big Band Plays Ray Charles (Live at North Sea Jazz Festival)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bd760a82a000123bba1b79afd5ff75b9fa73b5696d762fc86ee27a529fa1d0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLRD51400556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d5fe583a1c7c89eaf8463100d01a4f598110593cfc0fe71b39f9121584ce93. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NLRD51400561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fa7ef50fb21f28090dc7205ae8809445def212f5521c57f1a7895c73599418. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/NLS5K2000135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402a501b9fdffcc0931b35f8fc35c4c28f5bc87571c45335176bc4f7582b1030. 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/NLUM72200083.
Het Beste van de Beste Zangers van Nederland (Deel 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eeb16d2bbb1a22d44368d7b1bae597137ed0f35db78e75b1ee8d578305ae104. 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/NLSU31100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6099426ee12aeca512afff3a3430cd68a945493f5f4bf87ffcd50c2fdca47ee8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEN060601520.
Dat Jij Er Bent Geweest (Voor Nelson Mandela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c58db1b07b7fec92cad55090f0b27dfb71f4fa77d994c4d4eb5241721195d6f. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/NLXV41500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44c9b2bef8a86045c7e024848f2422a7d65d783cb83e1d4ac3331393a15c43f. 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/NLXV41500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b919469f8a8847b255e96fa18cafb061474b7206b63c788458b24845466693f. 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/NLXV41700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3c9bc78c3ca479158bd8a33c14922d09cac77c497ed1dabcf363f0bc11e85b. 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/NLXV41700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af49bce91c097847d31970c12f7682a3678476f4a18187882ff88bb6985cc9f. 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/NLXV41700004.