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 0x4997bb5375ab987e52152a76ab8736b59d6588dd544660a9d5189fb138b66aba. 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/9e30dd9e-4cd7-4300-83e0-a6da0f8da3ff.json and https://artists.proofprofile.net/proofs/artist/9e30dd9e-4cd7-4300-83e0-a6da0f8da3ff.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 0x6409927e3280cde4cd890695794c958bb002d88f0a8477204d9668bb0ad5b17d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USHM21574252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfa3a04cf5fa26f3d938f55b14b75394fb27aee222e3f8be8f534acb6dc0157. 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/USHM21574253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda45deebc1fc265a198ae1f129dac9e28d84ecb3284b189516dbc7427dc8f2b4. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USHM21574254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1e2ba0f18baab0350571ce81be492a175cf963d009e027c1a1528699f7610b. 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/USHM21574256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505d2ae915c3efc3697ca67261a0f87d05c45ae58f4a68cdb495a60aaf92dd6d. 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/USHM21574257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfe6758328e5fbdb04fa416ee9aec3a75140675f0c028aebf661e20a50949b5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM21574259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9260256ac49691d8b3269d9b108ee0b40e39505168ae7ba4b9cb2d17603729eb. 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/USHM21574260.
Råneran på Innherred og 20 andre gode danselåter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2032fb8d7fed0fe6ee380e71e3ece71825239b8efc8640c716cec3e054022d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/NOGTA1476020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecb194152b4606b9081df1f56f56371b61fe0072e9e3a97c5865a70f743c29e. 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/NOGTA1476040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f11931cc55acd090fe89d1b75952bd5a0d84b261ee1bf7a1cca10e852f7fd4. 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/NO25W1001030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399e3c6c15d60790dea792df706e86efb8e1bfd5f4e2a7f47ebb444f5681a9dc. 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/NO25W1001060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa80e9addb60f9c16fd26abc6f55149d38f43be1e1e57542e679ea37db50be5. 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/NO25W1001070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40906a4bcb13446e30884f5229be99c3c8a6e14a07828c4fc43d7d5261f7e51. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NO25W1001080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b31a7a37630fdd4daa9e57649f0debe140bff290ff121223ef144d8d225a6a5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NO25W1001100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a447a8e94742d8c0e62d6fb11ecb8a1945b4bbacfa1a2dd4828f9c3ee6a169. 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/NO25W1001110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b84cbfdfaf80a685136cd8c0dd01601de46a0fb944fdd7f47e864977eaf1a86. 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/NOGTA0780010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853659375ce958cadebfc71089ced706f35354de35b3ecae7c1355a671276e4a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NOGTA0780040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b40329630fb1fc9711c7f96b258b941702ffeb5614163acaa862597ffa6a4e. 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/NOGTA0643030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2093c89b31a8aa7ae6f9ce4584da6ec0338b492a1e9f830b37b88e97692a2dc. 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/NOGTA0598050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e60c2d3896c5d823e5bda0632c11b0c29a813d47f6676800698c4c58f3d5d1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NOGTA0596040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7983d5b54f38c1228cc6c089d92b5337620e0a2a843ae57ba545fc25b75285. 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/USHM22400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8e29283664333fc15d4dc766fb14ddb134fcc95c075061e23ef988879c35f4. 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/USL4R2398578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ea7fb3bb7458b5b2d0946fa5eb155bc4bf1c9bfd8584c022ba7a5781aecf11. 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/USL4R2330074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc78dde80c4f9181383ea119a59b27c914921f9634258db350059b21e8f0f9ae. 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/USL4Q2328562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bf9e35b0647b1fa03bc26a7c0aa3698821d7238eb2bc203f55d83da10842d1. 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/NOCEM2307011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83cf8b32b0f950f6d1f16193cb6bae6e379c06beb63c1d5cccbc88227fc01a1. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/NOCEM2223101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2f4ca7c13595589ca8082222ec3d2bc9fb446df1e96f112705102dbe546e6b. 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/NOCEM2294010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4158f7786a26129bc651adb17ba6bcecff86033baad45ecef11a7e5852ecc3. 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/NOCEM2284010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92b27f5ae3d51431395d2bd62f6d3342e68bca26f8e168f6e4502b295147988. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USHM91753274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb1dadc850a6903ad779583fc92af113a301a2deb3faec5420445c712ab8225. 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/USHM21746244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205aa48fe0081d5f941a1af55df3f5e7ad8e0e78a06bdec79993a3c0917409dd. 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/USHM21602541.