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 0x22dc14f4858f513d1ff47c8536ae1ca663cc84e63d4245a51daeb8b517ebdf48. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92d4bae8-cc26-4672-855e-473b70b0bb61.json and https://artists.proofprofile.net/proofs/artist/92d4bae8-cc26-4672-855e-473b70b0bb61.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 0x3806c2a48b18986605220857c9b8d25082bbc6be745264fb4487959f758908c9. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHN52141791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43baaeefe52be38f76b6162cebeec6ff4a5121260cae53ac8c70f494d161f6bc. 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/QZHNB2124652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d4b1dd5f9fff4d40d9b263aead68c55201200dcacda61291f3235499de5268. 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/QZHNB2176633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417c29808327036e2266d9dca04273da09bc12148eac2edee01bf572fc4a99e3. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZK6P2147716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa376e310d1d34ebe9dec1d4d0c02cf36521c6de828b004665db6f859887e257e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZK6N2178773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc6cc9f81ecb06d01c1355bdd3938ee5c202a3daf3cbe66752547ddd2ba791d. 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/QZK6M2120690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3669d28817861dddfd84822fda6bb37df59222f2140fd50f7a33ec87cedfb733. 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/QZK6M2122783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaca2a3cea7ac570009a85bea706cca7a1d270e400d4bca5808e52083c4f5cc6. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:02:52Z), 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/QZK6M2155037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf80fc56d11d21605d86fd7e0ef3bb65f55e921e7106e38248cb657370bc60a. 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/QZES82226313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670dbcc48fd5b40f6474d52879fe3a1e05b75f4767212697549bfbbbb7afe812. 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/QZHN62316360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cf694ff76d89aca840911d7d17b249370aeabc083af027b3fd8e7c27c7e0a2. 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/QZHN62316361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967a0dff6b0183c464fd060f8a52d2a38e9be71a5d0d8b0b034d17db88a3ee90. 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/QZHN62316363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafbd95b9747ad77fd4415f0a8ddb58ed630b13f83c9693e355830a749841641. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:35:47Z), 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/QZHN62316364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ac55038256eb9c619bf9bcd737983f987dcbbcf2ab429f5d2862be70c8b2c8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN62316370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146223df478ff9e3429970fd174d520eb78499dd018a38192f55eb8d43bb8e69. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHN62316373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf659d3c224625a54939d756fc8b39c43d8892a2b4e469358dfdfc15006db06d0. 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/QZHN62316374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e150c18dcf857ca5c15c16280c1f29a3f569d3c78c9170b3c68d95d9c0a0bf. 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/QZHN62316375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4094c2a3cfbc46704d017c95a9c94ffc5b1056f7079a4c5e6c389363144c3cef. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT3F42417404.