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 0xf948f6a74720e4200499972fd1547a435c1fa65897345c96375edf27dce59c62. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6562ad1b-ad20-4338-af0e-86231fc6d7af.json and https://artists.proofprofile.net/proofs/artist/6562ad1b-ad20-4338-af0e-86231fc6d7af.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 0x2f4a2c7dd43a189ab98dcf3a8603e81350e583de55b2049fb48bc4b249f81589. 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/QZTB72345071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266fbbcd74a5bccf77d5bb4165333c29e533191eae761408035c01204e1f3eb8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB72345072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56d2b4cb7f8fe50a5b84cf3783d7e37d40e2f34652392b798d0e9b0d431bd99. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB72345073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a5445cc4155854b18a02a1a4199ffa4266bb04db82000c23cba11c26294c3b. 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/QZTB72345074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec46e89f348d5fd6457ff8c152fa5fab1861b1c777fefaf7dedcc7bb999db147. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB72345075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18854b1cdb63bcb9fb5715b2f0d7f9ea684512825dc648cc04c2a1ff7f99950d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB72345076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b872cc7bd406216d164addc2a42d38910e3e5740f5993e4037e6f4ee1f8ef0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ22466578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1a80714ff5eeb3ba4bf42a47d3e89edbce4480808020d0aa78f3122b787c69. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UYB282381044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1a80714ff5eeb3ba4bf42a47d3e89edbce4480808020d0aa78f3122b787c69. 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/UYB282381044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c1c3c2633d3dafafcec64847d7e354f2594b4c5ae0864337a05318f1f97795. 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/CACWV1983669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb256c346eab1a9ddb275a1bff357d7a5f80ed431f65bd31b9429e0eaea121915. 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/QZNWW2292002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750707a5973192759523b6cda7f49cc75472c015aeea1905cdc0df1e09415a5e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWW2292008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349f80d7262a271c59def97cd0373ca39c6de95a544c2176b96575304924e3a1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFME2238893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79988c5751e155400889f6faac1c522c9c074bd69a92462b8bdf6fb6be725eee. 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/ESA011691584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5eec332213b7b6ed1030de214e2cd4ffad3b2ea156b3d885b74377badcb509. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGJ1793986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546fb523156bfe00ace1e9b7a5a4c6ad4493511acbe356afe0bf5d141700eb87. 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/QZNJW2154682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc103ab7d5908fac1feec299a6c1766932d36843b483bef5924cfea5e283765e1. 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/QM6N21818260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f79197db0d868f86fdd8aecbe4fdd7e6f25a78df6d6da1291bbbe2c0b6c9c1c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES5152500052.