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 0x6ce3b211e3207bdae00fffb78098d5cef0758bf1fbd7ab7cf8b9750f320a0ec7. 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/46e73102-824d-4a58-a498-242ad114df23.json and https://artists.proofprofile.net/proofs/artist/46e73102-824d-4a58-a498-242ad114df23.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 0x960aa3e6a8312d252484641616b432a3ee160455703c4e01b94a9e6d9a323ec4. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:06:24Z), 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/QZFYY2298305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d55de2d2c6dd68a34dce9d5f0900ac32940e3c9ccdd920715f79b02cd904a10. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:09:36Z), 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/QZFZ32205793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7b5d2dbb69680ea1569f97b84330baadc8424a2075a42f9bdfb14565275a6e. 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/QZMEQ2217127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c4f5e5b55b93c4189279f1cd5c555e847827230a1e48e56d4e89f6068c62fd. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZMEQ2217128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31cc6c19d0cee1b471f1a70b4e1f8c03674306fc0b2eb781e2121b885251bb2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:51Z), 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/QZMEQ2217130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca105e18b1fc4bb6d36fa17818f9480bb03f8573bdf0db66cce41ef617cc57d. 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/QZMEQ2217132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9be1eb1ea592be669a915eca6819e8225e4a928505802f9b002fcf303802a5. 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/QZTB52264593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da1c12d43c29adde46504201836a6e99c44cde6d521f59a35ec78d2ba333f9a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:05:20Z), 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/QZFZ22366233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f904c8a54cb271bdcd436a6f17b5ce064226063a4567a3e11226ba76b765cc2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMEQ2337098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1476fd96a5c27e7984c658afd887be861bd1d952a522dadb644189ebabcc32b. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZMEQ2337099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdbf0d960aa227df443526d6f4deba6eec31342a86e42de521a864d59f29604. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTB82341201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54225ec0120059b4f84cc741cc7962bfb02fd30f79c929e8b83293a9e81622df. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZTB82341202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3962011c49e63487e94f95d42e2a02faeb08a0aa228d447470c9569ade1a6e58. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/ZA56E2422539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c7e436a8f9c0280e97d4b79c5040bda891ddc36290d2a72da000096100e19f. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:05:33Z), 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/QT3F92548059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8392852dc99d51844ee214b0c0a8fdacc03bed5c5737d6de47023cf0bbe0ee. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3F92548061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf281b68a946bf2bdad21b2b88826aee588c700128b706aa541f41df5e92b3433. 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/QT6E62595890.