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 0x3eaef185c255e5dc51609856e2af679bd5de5ff6382a3bc4e7da0e34c4ec7ddb. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66161581-59bc-4c20-b20b-32aac1ce793c.json and https://artists.proofprofile.net/proofs/artist/66161581-59bc-4c20-b20b-32aac1ce793c.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 0x38a19c206058249ebc3fe01037ca19e88eab0416bd8fa5c55e67ed78bf2b71fd. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHNB2525439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d39e5608aaa7bf7df31ad48abf1dbbccb3f0121ef252c20b7c9c667a2e17667. 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/QZHNB2525447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76d1be913c28ded5ef75b4a45cdfaa88700d6345276851c31657806bc4238ae. 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/QZHNB2525443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9120e704993d4463bebf3ce94110d62792e71c78c954cce668730f2f3d4fe8. 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/QZHNB2525442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6de6bfaf564cfeb3ca2d28a27c51019c2b3ab26e4b7f1eee3ef5c22729146c. 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/QZHNB2525440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c878d73703ca4d0559e4af72102496a4139b2a822b27de2783074e4d6fcbc9a. 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/QZHNB2525421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a59b4e3e609b39b6bac250516382e1b00e018a8a2f0a3c492ee5026fd60b5b. 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/QZHNB2525437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7472ce2e9003cdc96c3312ae5f83c10ea891fc532c7a377de8f900885abf211. 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/QZHNB2525433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07047185404cec4f8cda271b62a41feebbb8d60c6d1f270444e9fb88a844a2ca. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNB2525416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f01409a7cb5b633a7df2ec0614ecf1b174ad7775ac54632a9163cd7dbfa1c2. 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/QZHNB2525435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2132fecaaae992e6c1fb1f3e6c4ee3b5b23b5cb3a02c7470b78ec3785b15dc8. 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/QZHNB2525444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaf78a0605ab46a6da1d101213340dde2a9f235ef4a0b9336007bbbd18879ec. 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/QZHNB2525434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c52fcde9f8b0766182796469c84da06860d8c121d52285b2d28d9048b2f2419. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZHNB2523635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac846a70ce9373b0bb7b2bec69adb3a78cb2aea9a3b390ac64b42332ad7d1906. 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/QZHNB2525445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fb2391a14110bfb43c1af0ecc02f025ceb2c0dadca55c5d21a481b54e55b08. 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/QZHNB2525425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca5e760dd39e693f561ea22ca6f89bff39b661838f69f0cf00ff38439f99bd8. 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/QZHNB2525446.