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 0x64e199c97f4e2d17296159b52890f34278183bbf3a08b83255ac75467cf34fe4. 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/8b2a66fc-fee6-4121-8415-e7eaf055b8d6.json and https://artists.proofprofile.net/proofs/artist/8b2a66fc-fee6-4121-8415-e7eaf055b8d6.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 0xae374c5ca518caf598c28d3879ba409b2b5508fe74719cd1944107a962436c76. 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/DGA0R2409781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255180e15d7ed22f6e8d8de96d359d58e8868c489719de61bcc8089a6e8ba538. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA0R2409784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405b0affbd30588ff0272c879af3616382e4704d265866d60d7249a6bd0870d3. 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/DGA0R2409785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68f1579870a69dd4118107e60550d9f5b74a4614a52e1bdeb2cfd7f9d665078. 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/DGA0R2409786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78a20daab394e5370868af1d7b2c7a9a139e008b8e8e2c3a3e9be68664e5194. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA0R2409787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b25c07870edad1b2763c20d4e4d0fe2714da551ed7442a0f3e9870e277ee29. 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/DGA0R2409788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf376b5d9e1383fbe34272fc49cbb7af897f342fc4d607ef50047086180258faf. 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/DGA0Q2453705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d059819f7c628af817062e532ac018ceb9b1fde6bc81c77f6bf0e7d9d72bcce. 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/DGA0Q2453706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232618d396331582bc481f4e371f541e11c68e506a6865128bf20c2b8680bfe7. 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/DGA0Q2453708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f48c74d6b59f92d6ef56be6aa697e56bf0a0b5b180294c6ec25ed9b21cde0de. 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/DGA0Q2453709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8399647426d40921bca14b92608bb5503fb7e2b09644a96e3d2920e1f51960b8. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/DGA0Q2453710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aba77ce8646bde39473e8329ea82825d4b6bd36054c77ebb3413a6a5a923740. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:14:27Z), 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/DGA0R2409868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3430a16aaf8863647ba29eaa5982da6d95e6b08be00605b05072e826ed26177. 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/DGA0R2409870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98825d4bea2e11486afa692ac225789d2a734d1bca72956297bead16fd14dafd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:24:37Z), 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/DGA0R2409871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255db9835b1e97b165526c15ee204dc6cfd0585908fc32d796f6a2a443ea4fa4. 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/DGA0R2409872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5f88fdac8f35b37ba702724c55dfca69fb197f81a5b6c50ee30131cc50104a. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/DGA0R2409873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe529c81718f4b77bb011bac867d7f6ab259de69ef8fb04a307cd77c3163b463a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DGA0R2409874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa189066244ffd67efc0f1b618194ce0a0e130680a9b44c763f93a2b373e8d45. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DGA0Q2453693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a203bc8cdaa0f3f3d37850ada5b9769f273fdb8be74e4b5eace3d3f02679822. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DGA0Q2453694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d84517c37d11e73ed92fc81497dde3c9c04d62be4645b56ca5576fc1326b49. 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/DGA0Q2453698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37a3955f446c076d423270418accf888684ac79f5304cbdc98f15b2dd8f4cfd. 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/DGA0L2493384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57128e970810cdd79a2d6a108a1616083a5cabe84fa2d19d21dccbeb2adb42d4. 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/DGA0L2433244.