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 0x36826bcd278cc1a0b5a87b14114ef51b2e1ce1e5afd6dce02c51491f6e18a125. 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/ff35986f-e038-493c-bc8d-70c66f6f2639.json and https://artists.proofprofile.net/proofs/artist/ff35986f-e038-493c-bc8d-70c66f6f2639.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 0x4e35cb79851bb14a74c052c7aaacc3ea9ae148255056bf87ce8652721709ed47. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/NOGTA5825060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6147857379f33680d969a59e27588d8f3f58aa2b8657573c479e4f1a1909f1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NOGTA5825080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3ddcec2c936c3493c073763cbacc00f9483505d1fa68c5bf99cdcc00eb478f. 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/NOGTA5825120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cbd8ef74306e58e713569810639e6abe274547a4293e18d3ebb04e6150ea7b. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/NODFA0601110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebeaf155ea9fa748e5b1741618711eada9d0db2791fd3e0399f745ec83c0c1f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NODFA0801020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf26b124141c4b0388061b9a63d424bcf468f3a4aa345a6799c7db82095977fb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NODFA0801040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ca8ede6da4ed3f6899536e161d48563edc0d0a404adc235246ef33c4438d72. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/NODFA0801130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde90f5b703cd882d64cf3134597bd34475ffa4cf365694711040fd1e2885e08d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/NODFA0801150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f55b61a5362704e2f0dce7c1e58d9368d056f67b2daa221a11a3ebb018b50e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/NODFA0801210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090f7348be1ca18e0115eba128b4f79da2f8caf7148a294d2cc7fc33e4de101d. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/NODFA1701021.
Hei hå la slegga gå (Hei hå la slegga gå.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcabc10e590d725c1236a64b58df8f417de53e793271f54facedcee6aa34010. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NODFA1801070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e58f3376d555cdef1dccff79cb5c0f53740364096070a194f21cf2d85d0f750. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/NOGTA0598080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc432fb33f5de12be848545b23aa766b6f9572acec5166835a47087198a522d6e. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/NOGTA0598120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c786c424bc661455d71673fee192d24511767c700a4b52ba26e306e9e91ea7. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/NOX9X3224914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274593d38d90e397efc2fac71b75bd74a1ade20d6ef16ca9c5358acced18e64f. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NOGTA5814070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9adf5d310af33882589b35f8c45513f6c1ff3452f47002ed21051f26d4d3de. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NOGTA0398080.