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 0x59061b4252ec8506b77ad313bc804c6fb59331efdc658124821fc0133e0aa669. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2b0a579-13bb-4062-a694-3dd4abf46d99.json and https://artists.proofprofile.net/proofs/artist/d2b0a579-13bb-4062-a694-3dd4abf46d99.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 0xd7b4c7ced5f329576779d3b74aedb6dda65d203cd3bbfbe6c7407df62c3f362b. 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/DEKL51909000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2427a8a78739385edc7a53f0cf7a64b24da8577fb951a7241ab5d10bd8fa7cd4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:31:17Z), 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/DEKL51909001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d93d5fe6f05e9d728775a1c49671d84ab0e0fa43e73a8b28a160da4c404e04a. 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/QZK6F2283707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99c3e2d95ba37b2a62801004a254fa5a94bd7f53bd21c0f0f0a8fddc315470b. 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/QZK6F2283708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c208d7128f1c10f4c9ed985e85bf6fdc556ebd16cc22d9a7cb3607609ecdff5. 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/QZK6F2283710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a492a9fe206879ac7899cf70def5df5b32b27354624094d649b49c87a69a7bc. 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/QZK6F2283704.
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 0xde0d5208119535e500d2340631c8b112aba552ebc4b3fc4e18453560fc9a17bc. 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/QZK6F2283705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf0705990eea507eee6f9da56abd30b69d129cc5e255b7491f73271c4dfc0a4. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZFZ72298620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa7a0714716f4eb2e6c9a34645c1f0d9fbc7a72ec10b33dc3d1110bbab66e5f. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZK6F2283706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfffa49334d5aad1a82a11f8db2dfe1808428dba50d5239fc7c2a06cbcc692a. 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/QZHNC2222835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695b875c639cd357f3d8d97623acf0f0b536531a3d04b746f72a0b2ab9d88736. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZK6F2283709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dfa0e0a26661ca01c5919e40bbbd6a7a1f3864decf84fc667bd0f039ffca3a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZK6F2283711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf766baa9a334b0d9becdc8c5606ab26922f651f60f1c81daad7b3e4a6ae9ca49. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZK6F2283712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09e69aa6dd443b511d94ed46b608329408d1e7d90fbc7ee81760bd27b562f44. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZK6F2283713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd843e5b45787ea6e88aea6f2db2299fa475b191196ef0a2ef3b6663b20be3462. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZK6F2283714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040b91f3cc398e5d65e8542716e3b928a580ebc39c10540884951ffdc25d8b7b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:33:17Z), 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/QZNWV2449601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040b91f3cc398e5d65e8542716e3b928a580ebc39c10540884951ffdc25d8b7b. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:42:13Z), 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/QZNWV2449601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f776576f7516e227e5a21dce6d02b0bc28201d100e4d74c0da62eb8dc79bd73. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZRP42485517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8316c20cdc7ad8cdf9c0a8bb19f79250d9952012e490e1f842daac9b019d9bb. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:34:06Z), 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/QZTBD2432757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf30a9e88bec1289498093858130dbfbf00a37d40ae18086b418fb7cb374745e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:51:19Z), 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/QZTBD2432758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16226c8124ffcf3b21db6c4151aaeddfbfa756560cc82a9cba58d2197068c61e. 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/QZWFF2516993.