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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187d05ffbb5f1316be1cddd7047f8e340e22df7b6e00e003faad90b25f3862cb. 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/fd48a191-de53-4d02-bc70-3102e9a7063f.json and https://artists.proofprofile.net/proofs/artist/fd48a191-de53-4d02-bc70-3102e9a7063f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae431da2c903d93e6ca340c7c444b0e6484fce463d606ea3290d87371d96958e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCABX1499948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11506e363f78dac87e3cf685f20858a1f5b407a797b9840b908a334638079611. 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/TCABX1499949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dd790c5eaa1fd6551745b4371e72c209c4a1c692649e831e26323796814dfb. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCABX1499950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4971a1dda01ba10a1cd87bc6183b30620afe5e521c13818c0807cade1b3c1233. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCABX1499951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb51734a493f6e591ea94883e023544e03da03d5c5d3f2e688d39c6387c12a6. 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/TCABX1499952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b457cb519ee59031b43e7cb625393c60fc529fea331dc96aa2e8ca91c8fc318. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/TCABX1499954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0dc987342a42624685ca79d649dd3dbebc91694d09adbcc01f79984388e115. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCABX1499955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac2d2489b5384aec9bb440bdc5974c677153153e0f14023b3aebc98a6c98581. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/UKBJK1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffb31f18702f24954000476b36e53f1b2773eeab54d66ce8fa6501f618a7362. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/UKBJK1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244c5d4cbdb88d384a41f2f6fbe5b9580994faee50b883913dd629199620f193. 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/UKBJK1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329a6c2ff54a8bb92b9a720dd0f0d41123e7a7d6555c529a2ba39212f35b623c. 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/UKBJK1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdea009fa507adf838e370e63f0dc2a234aaf0487ae97f544bb215fe6e2eb957. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/UKBJK1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2309f8e5aa0e42259a102ab6a2c3393c22511d8ba8a0b6424690367157c85b6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/UKBJK1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83828c4e734970449bbe1fa8e9d3031c52d5f61aa9c9d01d4102350d7e9f0a6f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/UKBJK1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898e9eeeb2248f820122bbe0314df6250a76e91fccb85fb03cdf155304378810. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/UKBJK1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50a65c4816727fffd514358a6cea69794671773e6c12446876274fc1283eacb. 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/UKBJK1600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1a778bb76ddb7d25833897ed4da5575dc1e744d858835e3daf5024ecce4ea9. 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/UKBJK1600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28900faf10c6bf3905e4ac010fbd97f008b95578d596c1905e36c7dcd7cd0e6c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/UKBJK1600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed50614f82971a2c8911907408d7993dcd03abcd554442951842c23ff0a14472. 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/UKBJK1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb70593ee51f6eb02d9e6674c29af5da8606c89f69bf1fc019b34da193b01279. 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/UKBJK1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba449fc7be2281596b8edfaf00c33bfe3b4df94a393525518ae4e69e723704e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/UKBJK1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213b84bbd11c3d806c828e04847c125606adbd24d586ea4982d637a170fe6fa8. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/UKBJK1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3939e797265ae73518a084d5275c562bba4294c0aaaa5e633dacdd71592cb3f5. 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/UKBJK1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227d8b9be0af02077513ba6b992406f550f51213aeaecabcda6f50ceb23d1fca. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/UKBJK2300001.