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 0xad7bd05842357d531c4fa18ba14eb0b1b41e4af318964b56f494f27cd01cb4d5. 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/6a0757c5-bc1f-4e64-96b4-857f951946eb.json and https://artists.proofprofile.net/proofs/artist/6a0757c5-bc1f-4e64-96b4-857f951946eb.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 0xf8ff86218f2935dfd833119c359136fdad97a84798c8fd9929824d10617b7b3e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:18:50Z), 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/QZTAY2218278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dc3819115772859110132ba180a099e47fd4fb34b3347b4df700b89fb47938. 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/QZTAY2218280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31183189d8e3fdf5524db062283c7cd7306aed2be15933af0cb283563a560541. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAY2218283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42e64a317166a0d78f2c38467705e6d712a9b71d9cd3e095cece09b2c760a9a. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZWFH2315324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1680a8de082dd3cf90d1078e025173fa3d38be8dd6a0ffb3d6eb53225f02161b. 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/QZHN62458444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772158cd1cb095fa7acc0ea70d6acdca5ee0b691aa37325f8106ecaaf07725b4. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHNB2404117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5840cea9c0462bf809835785dbbf0b5dca62064113e68973195f79b64406fbaf. 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/QZNWV2405544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed72fa367f7afcdb1b2a4e1f11d7f5dd4500caf222fc001f381f5faff04ec52. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFYZ2537311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353c5a1193fe1168944fbf6cafd0b7a18fb7ceb2e954aaee770bb72afecfb6cf. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFYZ2537313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a3d6c9f88e11415081422367056a18d883754ad987e1b901136246e549af23. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:19Z), 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/QZFYZ2537315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae3ffbcb135f45a9fc900f7ff3d5e1185b8766108e578bd6c19abcd230aa6af. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:05:26Z), 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/QZFYZ2537316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94335b1368269a61c6407829d4fd697e6fa2b3c2562391cec778f88bf7d606a7. 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/QZFYZ2537317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce5d84e891927891609edc4748b55c5067297fce9d877df7f1900fdbd5b3256. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:24:34Z), 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/QZFYZ2537319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3749144bff1e74e4ad7fc59ae59912f62f4870fb8151f13ff60f1227d8ad347. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:07Z), 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/QZFYZ2537321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb666b67cfc16f329d8738e9226b6059bc81fed9d68bcfc532e7c1632729e7e2d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFYZ2537323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b61ae2e778c9e99f6aaf9b90fa0b1029ce70c1245fed9c764caa21d653d5bf. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:49:18Z), 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/QT3F62582723.