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 0x40537c6bbe5fd14eb24dee0ed3f387fd52980c6589bd9c52180650091c40785d. 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/a50d0cab-3edb-478c-80a6-5518be7a56e5.json and https://artists.proofprofile.net/proofs/artist/a50d0cab-3edb-478c-80a6-5518be7a56e5.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 0xfd36ac40a01ce06e980b5b0772c9c5da5b549ca021dcb8ba4861cf8be2800edf. 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/SE6A92374946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6898ab01af5804c0f3a3fd3640bce87addd3d51dd60692ed1c41db0e9a7bc258. 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/SE66N2329494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952d6802e1a97190a2a5015eeeb788afaece03af729a7b88fb192d982c81ffd5. 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/SE6A92378674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8097822e19600f7b2cfc812155af73cff91b644c4302b892ad66d203a06e5ae. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZSYP2438971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76adeb6b9aa3d0041a113e072878049d7fb5cab23b56792326911495ae77633b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZSYP2488440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0b62a17cff0df5119d694e4dbe54660617c81c4f3cbf7842486105b2b6c81d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZSYP2491008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e000d4f66eca0e58deff39fb658d46e6b1836f0774768cea6eb163556ced48. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZSYP2437194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9068be52197ace00ea60911d27e917863e48d5f9e532f1b3efbb211f8ecb71f1. 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/QZSYP2454127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134131a886c9453ca5ff0a2881f89b4814e11b9103bcca702d7631bce3b75334. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZSYP2486213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01aae15151e1864e8a201f6fd468a3d9b16226b2da40aac5a4bf0fc4125a9885. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZSYP2427439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5285b977f923208d6e598b985da02cfb4daae4ab949d76e3eef6b98a540cf867. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZSYP2407999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6165f0f2149f052b1cbc0986a18483446b47df385fd311da5c0a5587142ef3. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZTLA2537384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494f91506927ce9c22203c2db96409f0b6e162ce361d60904c4119ecda1ce0d9. 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/QZSYP2559206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d7b9f5cd9f9a8ff3efd4d42a58f3e3d2cc8a5610b187c17afacf9a57865962. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTLA2577584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b713d0f8b39f122f20c2f867a0b7516506894cf3f9cde6efef8b1f094d3005. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZTLA2572211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb436727c1a5a6b25e84c9ee5767fce568e1373a15f502528a33515132f776c2. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZTLA2518472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8a3741ef9a1fa6faad7cd4be0d1f63812562b5be3c3f174f91efd1b440b6f2. 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/QZTLA2506256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6f8b9be56dd1860f4f52c68ce433b9d66bb9463f205035b39d524f9b3b9dcd. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:54:58Z), 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/QZTLA2520112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5593ba44efef1df45c8e4cfdb1eb9cad6649379d89e99267586e68f90882c4. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:01:21Z), 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/QZTLA2513860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8bd192483c11578e59b612152b8984dda77ba73678330e88b743c42b03d7bd. 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/QZTLA2508326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4acb49fbcf3fe38c56d8613c9d2e69037df95f080bfaa0bdb461c932f122c5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZSYP2533729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356d4809343434745b4fde498294a1bb7925043123ab2254f8bf523a3e5e3aeb. 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/QZTLA2556556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ac5ffb005eb76a68c07562f1a39414c08596fe0060765de3a95bfc6735064b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTL92591899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aef8ad645b9217cdae4e5118bd0c636c07e80b9cd6f7b6d1effa7f7f4ed169e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:43:55Z), 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/QZS7J2507486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21462575c5f375eeb356a49c1edaa94d564d0bdd4d00386cfcbbf4ad43e3d2a3. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZS7J2534251.