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 0x607402de75ded250b0c592e091c365f333753a37d61d5142fbcd3803632ac033. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba6ef54e-9e2f-4d57-aa2c-0f06d405a92a.json and https://artists.proofprofile.net/proofs/artist/ba6ef54e-9e2f-4d57-aa2c-0f06d405a92a.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 0xbd0c57c27ad7dbdd2694f777fbcb6238a66a0a40fa70f8e255f91bd0be58afba. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:12Z), 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/US83Z1768464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaab74fb6ba23369eeab73a9aa6e1cfdfec6c20e794ddbde627eda90dfe9472. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/DEH741709302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04a036594ef3d1f42a56cc6d20d1a021af1eb35811fb9d1957e76a3a9c5b28d. 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/USLZJ1714493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfed3c074dc2c66d9161f03dd76d033131dc5aef10d62de20c828408240eadc. 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/GBKQU1801057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc035ef61b46d39d826e8aaac7fd95e409bdb2b5d43880ae467d6a4d820c0edb5. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:53:13Z), 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/GBLFP2326658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1200ee29034c405683d935a0575edc1d423779c1413b8242939c8d3f7694c9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA0L2428778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66a5977a1010f00c6e5bb550c8c97ebbe17c507c4e1a3e5bfbd3a04eba5dc9e. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/DGA0L2428779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038a551a36a0ab181ae44ef7c959701dad995c0b829063dc9efc441cdae1c75d. 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/GX3Q92558729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c1712dd2005189907776915732259a95b8acbe98b9cd4958e31a4d53cd5946. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/GX3Q92558731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172dbcb7d1d8b2938363c5f0d3cc2e5ecc590aa1313d22fc58ffe24b6751c7b2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GX3Q92558732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518a3ae93de281b318e05ecf0333080f7789213ad38beb3de62b7b126dbd035d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ROZBR2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7818392b095885bf6dfb03e14967d290e03ce0029f63c961f25949afeff7fb9f. 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/ROZBR2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09d3a01d63b7fd9a7d429674b4aae48df062866513c30bf522d6eb93cc106f5. 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/GXHAF2523351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b4165b881cf9ef9cff1e5a588b91c9b7a1a3f6021d726bf42f67b02fd38dec. 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/GXHAF2523352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b03f9dc8495b3964573f98d3fa0e26856e33f53896a0256960325e97f718f7. 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/GX53U2648652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd51dc678b059b961dfdff8bd3247775a92b3b355dcca6f62ac8aed0ea782dc. 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/GBKQU2577677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e52f038720b98e5e76dd53661782f9b4a16142457876b7940ba3d025bc69ccb. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBKQU2577678.