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 0xc5b1b571a6a22e77091b1bc4bdfc151f11ea0597fb0c936e62d35a968b2e7724. 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/2b1d29da-977c-4941-ae50-ffe12ec139dc.json and https://artists.proofprofile.net/proofs/artist/2b1d29da-977c-4941-ae50-ffe12ec139dc.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 0xc13ff1bbb736e9a5552ab700940cfb17409b0e9603453678154ecd19c41db2c8. 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/NLB8P1500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53f37c9f9537a6ad84ed6d5247d5accc1119d5cacf6de887696b254d5b4b72e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NL25I1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4e6b28cc4917e48f5192233fd9d33139001bdfc9150f477175e95e50522e9b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLB8P1800031.
It's the Weekend (feat. gnash) - Single Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0795ee686eaa5708f54b7ddc7c83c50e2ba26dca211103ae9bb8f3f3ce5530b4. 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/NLB8P1800034.
It's the Weekend (feat. gnash) - Boogie x Pyke Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a01e661e6145124076b600728c7be2ee6bf6c4795cdaa5e1f9b7e422ce5e3e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLB8P1800035.
You Again (Soundtrack Den Horizont So Nah)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536dd4278dfea685c05ac8ef050cdd9e6c3b8018adddd5637f6a831a0429e077. 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/NLF7W2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf14160500bd708ed5485cfb9b65417e818a496ec300f91c05d5fb7c0d7651ce. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/NLB8P2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452bad194f43e4edf00beae5935418dd9674b0b43f71879eedf22077674e4a4f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/NLB8P2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42215e3f9c11f0f59b5baaf1c8f3147dd3599e9700e794961ce1e074b3b01df7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLB8P2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652211096fa4e18e333136c1eef574dd8b60acf0d87ad63cddd8d84011f4cd0d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLB8P2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405fdc39727e1da82677d2f357fe610a4d2513cb0bf7e0043506b6de6aa34aff. 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/GBAYC2201134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19aacf438e03222a54a35490ee9b32f9c57465dc0219dc70169938df2d69309. 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/NLB8P1500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683deaa68fd081dbbc0234d76d038eb822e3951ae15e84ce0b75c985122244c6. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLB8P1500021.
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