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 0x0d9408b82d47a44aa258d25f0156128688f563558c4866bb573645556f81ae1c. 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/c20344f2-38b1-4f64-bca5-2d46c1fccea2.json and https://artists.proofprofile.net/proofs/artist/c20344f2-38b1-4f64-bca5-2d46c1fccea2.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 0xc0c4ab8b08f6e361ff4574459bf9c2846593f9eb5a36fdab2a27d4689c2aee24. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTB42446509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2f2f4d0bc72043b48babff5aa0e21c579ca1ea5a1b94ba3bdb23df3f6d1d3c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:19:13Z), 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/QZTB52484711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f9b30e27990c47eee3373a0437fcecfd9232af1b9e2b0fa200543964f5c884. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:49:13Z), 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/QZTB52484712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3978d7489a6fee1153b3ade3af12c86a02019437520f9dc6fab85a5ef3f2ac08. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:39:17Z), 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/QZTB92475138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee929ea752aa6f3fcce1a8f58060df229d2e28eba57e77160ea7b56c481d4715. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:06:35Z), 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/QZWFF2408821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44c82cde7ca467e33ea208c013f83bbcb2ea3a891020a232e1775f2f86d0eeb. 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/QZWFF2408822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8017762ff7fdceace47f3ed2e37607e2a27518718fbd734f10c259c02cadf6c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:09:36Z), 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/QZWFF2408823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86e3244a5805ce1ba7f231fc59dad046c75c7b4a82d3ae19aecaf6704115920. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:34:06Z), 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/QZWFF2408824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389846be645d9539ef1b44632b63d9afba40256efe79c7d094bfc170a500fffd. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZWFF2408825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ba198ef5ac515644f133f0b99207531f8ffed7e19dbaf9aff6d973de4d7def. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFF2408828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf9e2a467e9440742ea7326bc284a605b98125e3810cc9c2fe783df337c63b1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:07:37Z), 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/QZWFF2408829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec48add8bcc7503109a1d843e6c6a5dae41e4a36bace967434ee7d7c56c2512. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZWFF2408830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ea6541d0e689e46378f2cb44b42175fe18aa362af898047e3a044fe547410b. 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/QZWFF2408831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903424bfbd9680004a3ea35db185fd4b10d0cdf74e30f6ec1bf64193ab0122bc. 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/QZWFF2408832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01ec767098d2f961409beeaa7e4a0cc779fa4a2a1a97a4aabcf79cd110a86c6. 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/QZWFN2442956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d1fc9f775a3b67d4e10065b9d31e16e267c8e4486e7908d1f2a62149996d3c. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/QZZ7K2404790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d1fc9f775a3b67d4e10065b9d31e16e267c8e4486e7908d1f2a62149996d3c. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZZ7K2404790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fafe7da7f095de1087945b328fc93a2c11eb2e571d48dd8c0e4684b21b5612. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:01:54Z), 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/QT3EY2491069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa676c1712bfd7141ab1e53bf61441e8f410d2ad049a1195e12ec0aae7bed450a. 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/QT3EY2491070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb816db58bd7ef08c8a7c82d0b5056c204f4dcfa730111395881fec6eb18f15. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:27:19Z), 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/QT3EY2491071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedbc6dde488c47882a8855f9ebbffdc52c486df412e2dfaa33f174e17806203. 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/QT3EY2491076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df51d385ada4260d026d7fa20291952637e76eb7cd8e6c5eb176a493be33531. 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/QZFZ42540670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257ade4bd4f73ec1dcaaf880d0d0f6eef6760a4d911dc5e390153830caa50c6a. 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/QZDA52569075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1340a8d7294e60598c2a9f096580938f5a21b63c52f8317628ea6fef3de4fe. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6H2523290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257ade4bd4f73ec1dcaaf880d0d0f6eef6760a4d911dc5e390153830caa50c6a. 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/QZDA52569075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df42a565a651ad80dd001fde40dc5d48aec535b8fbc5a4eb23317b427189fba. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:19Z), 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/QZES92560629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df51d385ada4260d026d7fa20291952637e76eb7cd8e6c5eb176a493be33531. 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/QZFZ42540670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd844635d7a0403acd137969c092bf9bcac4d05facd251caf7a004902f3294925. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:01:12Z), 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/QZK6Q2590940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83dcb07178ab45c1a7c2e65437bf315470c8f041359e97572bd03bb37788fe2. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZDA52588137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f7d7913df757be8c00f70c93ca2178e80ce4c983b975cbda91f7c73ceced72. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:25:47Z), 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/QZK6K2549014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646c6f94f952aff5ffd433cfb458f9dea68c5ff1c9b55c48d173d3f9c8704dfa. 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/QZK6J2520303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6142e114b5dfd815e2759ccfbdef9769e7607455d21bceabf764c82ca873213d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6H2592529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1561b200552912aadf0ed190c334c429faf351dcb751ced730305bb4694d7c9. 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/QZTAU2565807.