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 0xfb48185e5e6ea0e9454c0cc0bc715b008c58f17531dbf8c690d003b329ec2a0f. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1bc348a-1917-4101-93ba-aac7dd9b0d50.json and https://artists.proofprofile.net/proofs/artist/c1bc348a-1917-4101-93ba-aac7dd9b0d50.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 0x149512b500a97000da5cc0ca1ab5e1e7b8635f5e13ae4d91ab93203afcfd3cd6. 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/QZGWW1957371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc66e8c84ae1f07d93b0f8d6154cd0de34a1b9497c7ed3fd5bca189508bb351. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:15:36Z), 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/QZGWW1957373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4044c4c066116933053547d7fe86ca0aa10c255cf87de8ff524a97eb9523a27. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:12:28Z), 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/QZGWW1957374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731a0031c10cfee4265bc8d7603023a5073eed6258f4a06285fc85277e86ccc2. 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/QZGWW1957375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afe1367a372b175b20dcd8406e1e416ae9c40617a3241456964c44e79fff27d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZGWW1957376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b923ca232a135bc809ecae452d81b66824398b4c09bb5ed3eae0f297a39c3b. 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/QZGWW1957377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dcccb3e1ac6f30f459c2c743a01e33b19e7ceb65b3634c107aa5008569285c. 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/QZGWW1957378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8acbf27e1405eaaf19e4f2db47d8d1743473638b23f5a7f8adbacef16e7b6d. 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/QZGWW1957379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5904f2817bdde5bcf67e72e3ddfdf0da8d1408d21dd038d7327c4ca1c5f1135. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZGWW1957380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf289a925a15077790c526dc2a270f898b07f8358e5832888a5834b895b5992. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZGWW1957381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da2280aa9711dd144c5180d9245b9d805d2e6b24a85e6423cc8547959bf620f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZGWW1957382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8c2c7a67f5de86c99f3940041d911770ab1fed50203b6e938d19a997c1a2ef. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZGWW1957383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7c7f31e2ff26a9fc062b3703c313673844d15f3b7ad3ec3616479ba0741de1. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZGWW1957384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37fa1078b05b0ad13f8985d39520cc51fd9bd77752b97b0909f6214901c2b14. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZGWW1957385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f0f8bed2e9c92ba7ce2cb9bfe820c3385c179b4a08340ba46ec101ee20f671. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZGWW1957386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b7a9e17e36dcd02a7c1134012833fc0667d3b07560630f96e1472b4e2fe0fa. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZGWW1957387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c833f3594c39fbb9b17cbbee5c640f19221e2c3bdc121e76a075614564df1b. 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/QZGWW1957388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dc871fc674c415cbe832a83bced8a2853f5714430cdbf4bb3f00ff37da9dbc. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZGWW1957389.