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 0xdcfae1627b01c8a42248f242b2952730e4999fc0b016b316b5f4f5dc698807f3. 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/abbe4b28-e61d-4199-9e07-c70b0dabac9e.json and https://artists.proofprofile.net/proofs/artist/abbe4b28-e61d-4199-9e07-c70b0dabac9e.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 0x1695fa169823834d1e7308f179840908b437f36935bb57199e06f3a034af18d0. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/RSA221810426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4510a2dc0e474d8739b4ecf303a18541ee053faca8d4d1b067ae578276e3e9ac. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/RSA221810428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a9bb2ef61101912a547f68e16c40846c260c8dae5978b057690ecc00a23031. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/RSA221810429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6c7ca56cd8e8155090047857d3a037152e6c89fcf338fb6d845a5a7507d544. 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/RSA221810435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e9b9d21d72042d080b08a371a14259d10bd127fdf8cc9ec48943ae4e5a2365. 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/RSA221811174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a9c570db85a6f6e06f4f8ea525d60551dbebe8fe8839d314e57368db4c4183. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/RSA221811176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c746771b6ed22e733d3a959ab1da29aab7f19ea96c81d8d709b8a738c978e1. 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/RSA221812042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5431a35165b2f8968c72f132eafde44f96c535198c6f6f5d7a5677d26f3ade. 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/RSA221812043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a69caf13936e799245e5569372a5f2ac4d577156e249f6b5d4c3d4b553e5c4. 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/RSA221812044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed22374a95d6102263c1341b24ae70f3a42fd7412109728212a812e994cde435. 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/RSA221812045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa416145090d0b4817a5f2ebfd92dc7bfb2f91a1bf01c093c0a7d9e2d998813. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/RSA221813329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440fa8a6e3fb5f23767405893c68f53a9ba8e5d998b6807eaca328e371ed655b. 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/RSA221813331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b76e38a3057bbcc740855c7bc1b7504bec711fcc59c23e271da52009fe600f. 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/RSA221813332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d519130f0f649954229cb64f2f7e20cc2d62d96e4dc4c178dcdbd15af2338aa. 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/RSA221814219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0e0bdd9e6092929adfe433bcb366f0cc780100229e0d8cc9a6816ab85ef517. 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/RSA221814222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda77b0c63848d67bd2189e48853906fdf6f0ecbfc8824bc69b3a781140c555f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/RSA221817904.