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 0xb16931b61dc6a862db11d6b01b9d1e85beb1059e599175302a3e945df3d5bdaa. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a49a91e4-0d0f-4100-9571-3e49114e7a05.json and https://artists.proofprofile.net/proofs/artist/a49a91e4-0d0f-4100-9571-3e49114e7a05.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 0x7a9e45eb956e1947d6b76fb8f899ba4505abdf3eb490968b6d1857fc59276db3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NO28F1506010.
Love for the City (feat. Twisted Artistics, Smidig & Mizz Nany)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc0de73b855606a844b2de929b613f126d9f85f6f44e2e840b3ed5b6d93f0eb. 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/QZ5FN2222261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ec9a6716e031dc3f0fb7ae426f34b28c93f5a4e7928441679aa793cff4997c. 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/QZ5FN2222262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1c1493d3c4fad5cd8b22484c1d137f00f81279f3dcfb508d8ef5b0e382522b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NO28F2106010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0abf54bf854f0c45da44d4cf076a87104f07e75596e1dff30d2989dd7cccb59. 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/NO2VT1101004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fd0467f5c85ca7267510fd023ca895410a6414730b0b984154c1d921cce6ea. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NO2VT1101005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b24579cdbc910b497f276135b00eed9caa6b071499f15a4ad9274f28a39db7. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NO2VT1101007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3766b36bb5e1dbe3d0c312effaf4a51749ed6386efaeb5d3a6f901372bedda. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NO2VT1101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7d75f23060774c91618d756e0a67813a8af4abfcd134d4364755fc4a5a2615. 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/NO2VT1101012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95084b0938af92adbd464d58a8e0ba26a049c7633e71a476d2f0f2bd301181e7. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/NO2VT1101013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018cd53f4317fab6404ba276e1168aa6e63a3571989e72cd83a8772b10400bb5. 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/NO2VT1101017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342de15a01fa948f30134a1ed8aee861ef1372d8023ffe11457a0dda8c8b4a10. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NO2VT1101031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cb1ebb7d681244ff5823d3e7234b6a3e4a67c39e665767e6e729b56f654be5. 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/NOCKK2235010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09f44e5d3b91f133516259a320b21eb641c6d543abc2b282e86e0b775d6e957. 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/NOCKK2236020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6050ea26a01ca274293835ed91d0d2d471f44ed474f216f3a67d8e9103d5b296. 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/NOCKK2236030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf274a6ad0db4aaac70e5dbb0cffa49831acae27ecf8d7387c0969c3338b4a247. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NOCKK2236050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ceb3c279e1f4354530b8aea9af6f774dcc61597a4e8ddcc2682df302938b860. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NOCKK2236060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82dc4a104c23faccd7c7ab87b91be37462f39858274db30ac980a5cacbce80c. 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/NOCKK2236070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b89d07d5c5d5548f2bdebaba32c75d83e38eae416f9c677e0a805a0a87c881. 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/NO2MH1501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23ef15d6a5da5964be03739467a0c1da3584cabbe4513646ba3e225f2532699. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NO2MH1501020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce367fa1e6c748126c31eb8ad4d9ed636a4e1b2a62b0d5be841c3fd7f87ffd17. 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/NO5NC2401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93181e52249740a929328d1d751b0ac90ae1cbb488a7d7ea4834c111d23d93a7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NO28F1707010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8d232a73c13f3df11511a3058f0d046e2dc7e16bdd67b8aa34be7ab2ae80df. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLFP1590797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8646f31cad29467aaebc8340bbf07e7f8e7aa3795246b632dcecbebf14c67f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBLFP1590798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9dba2b978efdadf9cba6ed3e57ebd0e4166e0b78142faf210001865d749d05. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBRKQ2163960.