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 0x89152a1f6c992172867752d41ee64e6afe5e8cfd973d2c8de6c88cbd573cf602. 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/ab09866e-8101-4aff-8e52-6a380c043012.json and https://artists.proofprofile.net/proofs/artist/ab09866e-8101-4aff-8e52-6a380c043012.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 0x262dd07c40ccb396b200f7d56295ec7f33231f4317f24be0ed9b49f36b22edcb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLPF0104996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a066f37e6fe950acdf86a145a617696d4d08eacaa0f666ba7d7daf9274d6c7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLPF0601308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf56fc1483a8e03037919cea0512b912e162fafac41bd510b7bc1c0d6890f790. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBLPF0107037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c85b3c9d95f518cabddef684e9e42af735c46f449bd91ed67a8f09bce2dcd3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLPF0117478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f33200864c6168f6806b187f4ba0d9dae64574b1bee7910e2b06dfb9a252c3. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/GBLPF0123160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770812da6654e427e4daff78c0eae1763e25529702b2bcb230094fbcea0c0d81. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/GBLPF0602759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2546baf3e23bfaf0fbe92bc7f4f9121b389638a066b7e7c3d33f1d4876b786c0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLPF0605036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060b6f7a72e4d9b9cd24beed0a44c225b0ffa8e1a5f95327e2a1ef525d186c19. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLPF0213617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47caea71327af2757ef8b5a5fccac8bf5183f88d563c257623ea7c51f94bbb29. 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/GBLPF0216058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8b4529fb349a7aaf03c451ae6f87a6cbaac6d0f3c939643c3f4b93e2bab9d2. 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/GBLPF0614677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743676d246311d8bc2d04f49580546435ae450181bdaf5ee47850d3409b73a86. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLPF0207634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220a9a91aa86d707d19fb5d3b6a08a5002f374c20def0aef6037dac665e3d063. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GBLPF0210952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd003474c62eb05c3aae733ed7f5f30a6fd3668bd77f432cf4dfea1348dd4f7bf. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GBLPF0219547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60afaa129bacb6a9357deb7649390bc80162ef5a2ea245265ff36db92d8db3d7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLPF0226875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3b4aad33fd0da2b79d2ca69bbed2f1b0540fca60cbdcf353e02ad5fae06da1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBLPF0237922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd72bdb7f5249d86870da515d947745914e3aeaa739338c511bd7ba53bda51e8. 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/GBLPF0247191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2095b336f2d87a69795bfb2f5e5a0a60956354903503f521ed0a7c1615ec5c47. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/GBLPF0262708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dfd09e742517c96d4192529a9076c3037024a83d6b37b11f419e25b18b5726. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBLPF0273625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a90c068b1ae659601e4c04f9d66b52890b06463b2dd1a95f7dd62cdfcc0918f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBLPF6681261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd1644558aa0d5b9224e543bb7ade76bef33b20a35b35f4240ea8c8bcab8a29. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GBLPF6694649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef745ba0b18c7c171a1dc039de4d7b920c382e5f7dcbb50bc4fd62897c070a1a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLPF6723676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6852ccb462bb6486e61ea6874790254b23f4f67148d6b8d047a01ba33cdc96b8. 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/GBLPF6729560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efafe38886b53f9e92de9280386b485f99e07a6972f055d011ade4565138089. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/GBLPF6755085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280f489e581dd6831a0dfce6c60521a470d58d19f199ee7f14f8ba1be53cea72. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLPF6766713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42c2f89d6701b6137057272baa9bfc15178751b284d9bb34dbd00d3794e3032. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/GBLPF6768738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f97b02a66e5d4bbc6b98d0722b959733c9f160379abe2f3deeefb6c495835be. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBLPF6786763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea9ff23d562cb68120ca13e7824f52d8e8f245fd311efedcc2156ef2e910ac8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBLPF2503764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9fef077f97de2a2cc8af12d440fb87f162b0d232df4d504b403706ee7af981. 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/GBLPF0264840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9fef077f97de2a2cc8af12d440fb87f162b0d232df4d504b403706ee7af981. 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/GBLPF0264840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116288bcb0891b6f52237ccd710a8f889782f685fef2658772a807d096ebd1f0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/UKZGC2204189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc8318324f2cda0dbe865a6281546cd40a03a6257d07766f20ba8ead37f5d7f. 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/GBLPF0604570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fc393993232deca9bc3c993696dcb801af3daa3bfcfce6beeb1eb3f0412500. 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/GBLPF6709890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116288bcb0891b6f52237ccd710a8f889782f685fef2658772a807d096ebd1f0. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/UKZGC2204189.