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 0x9921638156ad26649c214a6941910391d3dfa22ab35194753877eefbbcf197af. 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/cae22ffb-21bd-4ec1-ac60-d110efdb1433.json and https://artists.proofprofile.net/proofs/artist/cae22ffb-21bd-4ec1-ac60-d110efdb1433.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 0x065cf6cb60350b3cf8424ec00b1ae6bf5660e5fc7f8727831286caa61316d4da. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLE851300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50c1ae1b09d1358013f7051ff0252aae1271fcbf3cc7a199ddf25455395e7f7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLE851300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db09d1d56725e4bd67eb88d4f06f4639ba5e945d48802f43b1f6acca4eb8269. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NLE851300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66405d075903011a2ae0a04b5284d755571802c6b3a65232567e07dd3ebb6a9. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/NLE851300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec180de51bf67c5d35c78820777b35025f14fb96942253168e8926283cecf06. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:49Z), 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/NLE851300029.
Minidisco 2023 (English children's songs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3c26a833eea6a9afaeb2c94d63c13cbd908d0d22cc0eb87f82b036a648e60e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLE850200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61df7e66fae1fbf7d86180868151a9f6ade4256fdb8201afeea24f7edcc344a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLE850200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b005abb473bb0cb00ecf83384cfdc7e236ca22efeaa9b213d9cd0b4aa12a2bf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLE850900023.
Minidisco 2024 (English children's songs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed6b782cc96b1050beac982518ce671ccadedfb2e75faa7820c33dd5d032f7e. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/NLE852400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999c6c29b182c80a34bf67a43545c89644c0f664a36daa07972ae4f2bee3808c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLE851300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a2a32757b6a36fb33fce1f2e47630cf29b8661ccccddcaaefcb91dcd20f222. 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/NLE852300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066412caea888c31481ba2aa8baa0e52db36e673fe2b52ddb8487cdfea96182d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/NLE850900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4beea9fa5d227d6e2b3c5808bc44dde0aeb7a187eeea0eb28571c67c493e68d2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:24:12Z), 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/NLE851500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4027ccf88e2a414ca1aa94b3a0419d202f4a816663a361cf8cbd70ecb23ef6f1. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/NLE852300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e16e9895d2f98bb44e1e5e7a0f7b1daf6bbe073259f1c4f96834c9b13f18e3c. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/NLE851800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50c1ae1b09d1358013f7051ff0252aae1271fcbf3cc7a199ddf25455395e7f7. 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/NLE851300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571724c626b84a9050102b8e38073a2e4ace026a2a35051f4ee5407e3db9f23d. Chain 2 (Bitcoin): anchored in block 957730 (2026-07-12T16:41:26Z), 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/NLE851800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1937f2c4f7b54d340e3d1e4d40f79f7388e36fcd574e302049ea37bfe8d221f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:50:28Z), 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/NLE850700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2858d7b61f0ebce81d87361f52adaeddcdda1d17993dcd6874f3a5102ba8aa49. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:56:14Z), 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/NLE852300013.
Minidisco 2025, English children's songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed6b782cc96b1050beac982518ce671ccadedfb2e75faa7820c33dd5d032f7e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/NLE852400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95364ecfa02dfa39481c873c01c4bef4b1221fef98ec7856450bc4ca089b7a2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:51Z), 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/NLE851400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff355322857a4a245eb974f0cb77465ec77b3b1719c89465a05737e108c860bb. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/NLE852000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2208d211fdac5f364045c564fb8548157c411c66616f12a36660eb47655540ae. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/NLE851700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571724c626b84a9050102b8e38073a2e4ace026a2a35051f4ee5407e3db9f23d. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:58:24Z), 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/NLE851800054.