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 0xa00b5678e05be8185e355f8be19ad13b1dd97ccde2337df1495414e337459b71. 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/57dac094-a909-43a9-9e5d-041328d2318a.json and https://artists.proofprofile.net/proofs/artist/57dac094-a909-43a9-9e5d-041328d2318a.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 0x478a6201db2f42de135be2a074c26771da6a970967399961f1bedd15a329c83b. 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/QZTL92368384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0663a8e6a60701a40c8667161206216877e5e7db9d06dd0117313ad7dcfb711b. 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/QZQAY2327724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd807f039d02868462ad495fcd86e5ad1c7989406489d63af4e34ab7a3c358ea7. 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/QZK6L2211036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fb54fa3bb67e5c1d0a60f7fd41695267ea61e4241e4c2f6536f22e8cb9ac69. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2LD2010012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007d7625cbe98bbf3272338a2d5bb7ee4edc71e6d4ca121759c949afc7a51051. 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/SEWKO1000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471a03a1c8df19d3d74dcdac9a746d6c857839564292840be157f6528414988f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2355290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea0ed047eaee47fc6415a03ac5345b4057ac58b9bed6745e464744e6ef812f8. 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/NLAM42200178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2417885810f24e1dc456d2a3d61f2703f41ea1aef8a68db41c51cac0ece56b3. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GX4R52146118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fbdf643f104e14432d548e17072d7d4df9aa3b130d89b61b19c7e23c12ed32. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2LD2010311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31262e6606874331c58e20e5bc1d48ae0fbb42ad07d1c91f731825125b3cf1d0. 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/USA2P2036324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23eff3f609d9e1a6ff41cea29ca20207e561b05c079065449a29112697988a0. 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/QMBZ92006591.
Touch You (Christian Karlstrom Radio Edit Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0ef868f7cfadb48e542a93e7f1dea3881f5fabfcfe96d10d83832d79dc6e62. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLAM42000127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131b7db5f073ac4b2ec0b6cca7df38c069bb42ed7212b4636d54cd26afae521a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GB2LD2010092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310490163c5c8fd3afe48205e719a457d3139e9c057d76ab7c5dc3167bb22406. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QMFME1999778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe782dce8e8fa04851ab174ae4918c3bd877a2d4bb06eb6172b171a499cf25c92. 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/QMFME1917051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb28dca1b4896682be22d9f99e3423f66458fa3e57276d7f71445644e289386f. 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/NLAM41900213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9b222e2937ec0126468f94828b4a72c0a01e7423e28b4e187d275c6a67cd52. 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/QM6MZ1915707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35885ac4626a6c1c63c02e56bb9ba5f34f6afca72c216bd797290540059fa28. 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/NLAM41800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478a6201db2f42de135be2a074c26771da6a970967399961f1bedd15a329c83b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZTL92368384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0663a8e6a60701a40c8667161206216877e5e7db9d06dd0117313ad7dcfb711b. 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/QZQAY2327724.