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 0x0a79bf63b765039ea77acc55eac0b3b9524e641c1382fb40097fbfd75e828306. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6a10c6a-e596-4ca0-b576-858e4187a124.json and https://artists.proofprofile.net/proofs/artist/d6a10c6a-e596-4ca0-b576-858e4187a124.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 0x12306142d27c5d25020d3cc903f07879761b70cb6ef62357a6ec7ba1c5cb9519. 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/NOGHH0170030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aff5efd955eb8e1e94ad138af510daa1678c06eb5094cadca8ead4abac00b65. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NOGHH0170430.
Masterpieces from Norway - Old Time Dance Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0626540daabd9e4913dd5755f477570be0355a1ca0890f569f3695bda0e31de. 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/NOUR61901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55acc533ac4f7c7448b57ab315baabf3e17c6e3a37f0f03082880d1c710ff8a7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOUR61702010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652d20f8221476ba1b8ad4e6f6f035e76d0eef61f4adb7f13db2426519b3d2a3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOUR61702020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f7e0bf0f15642c379f3ac462aefbc9ea38af7d26da390a8b934058086bf6ce. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/NOUR61702040.
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 0xb23cdd9aaafcf71370f63e30d761d5d2ba7c980f11f574ecb8b996059c419e9c. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/NOUR61702050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343882b291820e826676a7a289c1ca6b6e023c2bdad1e0c65086ef9a555dd359. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/NOUR61702060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659cdc452bf9ac0067739f7152fb674a818edf9264f9ab35a9c8c87158157114. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/NOUR61702070.
En Vise Vil Jeg Synge Når Sorgen Trykker Mig…
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e22578b593f28279d7b7ae0a03a26c9674fb2a065efdd4ea1168a42c692e51. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/NOUR61702130.
Boys Them Buzzards Are Flying/Cotton Eyed Joe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc1280a07fed9bbcc1c79480e0fc8743a05c73a02dcdf783289df66fa41abd0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOUR61602090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad0ceedaee6239fbdb7118589606e796ebe96090853741ebffb6dba6aa244b8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NOUR61602010.
Norske Turdansar II Frå Agder Og Nord-Norge
Fille-Vern/Gamle Og Nye Mestre I Norsk Munnharpetradisjon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f8c2aaf9b67b8f399585f8574bbed9bbc7ccb8ac570f422684e30d79936eae. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOBGR0604240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe01f80f0a62cc2fbc5a2404feb9196102d69ac2c5ece4f110e158a4c6ff0adc. 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/NOHCN0202040.
Masterpieces From Norway - Old Time Dance Music