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 0xbce588bb39a4a6985f78c75fb2343244880099165fe339c7689e9737435f0711. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c2b0774-1e4e-4620-a65c-dce5fd7024cf.json and https://artists.proofprofile.net/proofs/artist/3c2b0774-1e4e-4620-a65c-dce5fd7024cf.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 0x856110ef7aba47ddc941fd27c68763487f19ad9fb32f7eb7cce80357b0551389. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USLD91750136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf39dbb6d12ecbe6e8eff91aa5ecc187ead54251cde9b67a68a41e6b0f0065b. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/USLD91750394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c704bfc60a6fad1fae5cb408954a2df9f99d8aef874e55b28aaced7db648ad8. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/USLD91750621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5e958ebcfdf4a4b1de4937642d02ba5c8b80890db22f78e8c37d5080b40455. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:03:45Z), 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/USLD91750765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8045143ce915eafca219b2c40fc18142d7baf2d64333f0a68bce924e942d0d2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USLD91751049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f071f52b6410259c224275309c77de9c6c7820a1ad8334dacddd7cca187d57. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:02Z), 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/USLD91751300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482f2e337e13ec56606cf854f3d7df1ef48e81fc27485de88797cc1788a67638. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:21:47Z), 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/USLD91751545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0af243cb6c5c6f9726dd3ce2cd3c2fa8d831c9e64441f0c0e783d28dc6cf7c7. 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/USLD91751732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf20707e7f2dd9c9fafd960ef4c2b9700a29e3a5f4ab101d11d06808b856353c. 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/USLD91751965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0d520d4f2f373c236593ce62ba0ae81bc3908253c5068b61ae386d646e7971. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USLD91752225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7c5038eddffeee18bdee4206d3247cef7f0429a16966b170bfff51ee889691. 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/USLD91752770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2176621a805d6199ce4139a32f805111f5239f8f94ff4e415d2df3a827a616. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:06:15Z), 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/USLD91753319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ff61382c1fae444c15c6f4c6a09f4b022c434d4b9ed5190c5276ac00b06180. 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/USLD91753120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7121c72b0a7a9426fd3241f36be28f61cccdb0f9828f187f5228a410410452b6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USLD91753858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cee365fef8aae9f2f423fd043526c954439a8d3eece2c8e64eae521a27e7ea. 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/USLD91760114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f5f3823289bed68c0fa7a218d7097fad6e06d41f6cc38791cdf747f505a0da. Chain 2 (Bitcoin): anchored in block 957634 (2026-07-12T00:26:43Z), 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/QZTLA2577659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c3e050b3cddec8c76af83433af74e8fd9b9cb756a40804f260a34737d4fe0d. 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/QZQAY2584548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861f657ab00633afe7039874c92b91f21714fffc732b564b5a433ea057d39aec. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:51Z), 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/QZQAY2501767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d59c7680ac780fb5fc39fb4b6f7811c7dfbebcb4635c9918abc2508fd771a6d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:30Z), 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/UK8E21961048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe3acd6e904e837e792d722a42801f0396a9aac0a793ecff326479c37027280. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/UK8E21961058.