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 0xf2f2c17a2bfd5116dfaa8443dd64d170adb913fa34a49b18267586d0848bffc5. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95badde6-bfbd-46d6-8473-bd2b48cf4458.json and https://artists.proofprofile.net/proofs/artist/95badde6-bfbd-46d6-8473-bd2b48cf4458.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 0x4d6497f06ac05bc0fb6edc8589e54c8ffc0835a4a3cba3718604b36e31ea4a3a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GB2DZ2320001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5682b16b7383a1eda2a7df5aeb2761862764fda991e5cd66be6405bf9a12781f. 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/GB2DZ2320002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bd96dead6b259559c374e7e619518ae8205a3ef06229239fa25fb7726b20d2. 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/GB2DZ2320003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc76e1db3e6d9c15d58190c7c2daa68cbda92ee0ef6a3a5218475737bc31adaa. 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/GB2DZ2320004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403c6cdd01df1769a9a028b42c56416a7fb9dade29608df76f856ef53fdef7e7. 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/GB2DZ2320005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cc8a90104f22a59b770d001fc782d5c894967086fae913c6b4f39c89a7a839. 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/GB2DZ2320006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe00ce5cc1acea0ffd4797bfba29399c22eb29c93e9ea15e016ff9caa123c26. 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/GB2DZ2320007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65da3f91e194bd2691a742b53f022e8b17a5eab13c0cfc3361869133573ccc6. 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/GB2DZ2320008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044c752f64119aacd2a3be999a852e8c3fcd6b167be99e8475e3c4ace5d88791. 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/GB2DZ2320014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b50bc655968f5266630a75f0518662cdb6087b427e9293e8bf403d8fd5aeba. 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/GB2DZ1600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d08dc322578c448e6d85f235f6e61763887560a491b487bdd23a3e490061468. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GB2DZ2320015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98f082a91f3ab4ff46f8f86168b52d47992da0517771ed74c7bd2a95d7878ce. 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/GB2DZ2260001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6ac0e7104eab91b152a52b08f6ac2b9b71c9b16dd0ad4b54ccca3cd4e8dc1c. 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/GB2DZ2130001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9662b176ddce41931a2cfe10494490e4a7762d10ab6163d9dea444c47b234286. 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/GB2DZ2220001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe430ba7ce4b5d02aff28b7ae9931c0e619959200504280002191fd1e608e91df. 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/GB2DZ2230001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6861068ef407625a4db083895b1a3fe3199d792e057cb78d4bd01352969c374. 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/GB2DZ2250003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f7bd1bcf6a93165425df0c2af03b49831f7675f0cc815941b8f0946862bf00. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEBY41200606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb419fe57b28c06afac9894e563e269ae44ea990155ef83fee45002a55deefdc. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEBY41200607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8951ad2c703094d62cb8eb3a3dbade15538ebd539800fed41246726a9841700. 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/DEBY41200608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0906fb125f1f2c181cbfc4de8bb6ca8c023cc0f0013653e796fc077dde748261. 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/DEBY41200609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea227bd819d7db069fa9162965e3facf3a2d6162a9d52cb06aca792cbf38eca. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/DEBY41200610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570335842c7d07af33f8a00c3cd339178b93aed6e2750d0959007565ed19e3c7. 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/NLL562301549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3660e833765bcf437e91c19cb9c0e8f3696b54c306142dfbd546609cd08ee1a9. 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/NLL562301547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b3d1f82417cf736f31bdd40fa11f2fce33edd207bfa6e65762e0ab0500b082. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NLL562301546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c55d6d9026e0327b3c39f2e95ea86566bfc65295472c2c85a861d7079fb01a. 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/NLL562301551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5226ab671b2f81fb69d7d29b93b98d65ea4a88dd2691cfa0524d8d329cd9bb. 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/NLL562301552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05013575529eb35b971157ff1ef69ccafd02e8081d0f59804db4c6871675abbf. 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/NLL562301553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bc23163cc66d1a28231809b161bbbd377941b8585e3045b694d1591520f7d0. 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/NLL562301554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb43d2c09706d2740fb7dad76e5d4f2961ab88a4efe67cd1a20e41a27e8fa7c. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLL562301555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1d459a526269c8c922182c36b1d0f5b0db0e20f2875e3fbed957743f5e2fba. 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/NLL562301550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98f082a91f3ab4ff46f8f86168b52d47992da0517771ed74c7bd2a95d7878ce. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GB2DZ2260001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d69627e1369f703086caf92f629a6962921889a61c61d5c68a568e6303f691. Chain 2 (Bitcoin): anchored in block 957240 (2026-07-09T00:47:38Z), 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/GB2DZ2260002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eab3d0e4e1849c19433642738a4c29d83b25882df6d7ae77f21de3670bdb9b5. 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/GB2DZ2260003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a62c26d87252e02ce47256f612e63159435230e76cc890e97a7364d12ca3df. 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/GB2DZ2260004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b3d1f82417cf736f31bdd40fa11f2fce33edd207bfa6e65762e0ab0500b082. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NLL562301546.