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 0x0168d112ff54c3c93fe93c59cbf9f43750e191e8c7963ee0a60b5dc38801fcb0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9abb9e4d-f6de-416e-992d-ee2614ad08a5.json and https://artists.proofprofile.net/proofs/artist/9abb9e4d-f6de-416e-992d-ee2614ad08a5.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 0xaed867965aeccc74a402d56bcefb2d8f6b02a27b0ead45eee30fa4dadb5e50ea. 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/QZTB42227693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b424e96ffb725602214dbd3c1850a0265696b308e7d4857a2cab237204f8de. 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/QZK6F2314380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f40232e247b3b0cb8acbde3778a36eac58664082b3b83bb2f5655ccfa687b5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6F2332567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3a0141cdea9decaa99003a5f9ecfd725273eb115ec2a99ee85a11e398be74f. 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/QZK6F2332568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed93892fc46afe6b9d5ffaed0dbe6d00a8d4e1497ccf0dc9edcedf461cdc1c0. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6F2314384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040a4922a60f5bd3d23e14afd9ba22439d9b9f15f794fe2161ad14bcb36cccb1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMER2247079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec916d0c6b57b4b0ffc75b994b37b121ec79112652ad4b6e420ea157c3f343c8. 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/QZK6P2437902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61454ad1475451e2de279b852fb841e6e8ada25043010a0b3ff2796a91ee9300. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:31Z), 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/QZFZ22561192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43051d5875fed2b6a6c429186a21f394af30fc68962a5d3071effd884e60276b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB42469060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfd2409b581edca52fb0c6184fafc6cab50999d732e33eb343aafa5653c2895. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFZ22561193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8298368227f7a7ad453611b9e8a52c46637bd59e16bc292511090601af32402. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ22561194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0482e51b9d17df1da36f0adb3c10491a4069a51280ffe0a07846e5f30e2bcaba. 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/QZFZ22561195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae999cf2631c1e1d1ce16a3c4f57601724fcbe0532fd6f1f2e6cd75d53478715. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZZ7Q2466271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3d197630ec7ada2729700509b6ab1aa6d94c7cce951e785c39e2d41f652663. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:26:18Z), 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/QZFZ22561196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02145d5c07d799bc6f83d49b7e42aa120e3a23626914d3d732edb6f9a08df274. 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/QZFZ22561197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a24812f0fad09fda4bfcb285893fb50271e7e2dbb18603063d5f0f1bb40ae90. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:36:33Z), 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/QZFZ22561198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4d64485196a16b21980b02240b958b5da7966a8cc6da49768ae5dcc72fcad5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZFZ22561199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dabdcd3135ef30fbec46f1c0603937f2c78ea6bed40edd92feee8f43d2650ae. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZMER2589377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7bb85dc3c98f07032a06a232d75e4398d299f488a1c8db131d628a66d63656. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTB72558431.