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 0xd8a1185049ae7bf204899dc771892f2790e2930be364cbfe1fce735abcc0b422. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a62417d1-b3ff-4138-9c76-bfab1488c019.json and https://artists.proofprofile.net/proofs/artist/a62417d1-b3ff-4138-9c76-bfab1488c019.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 0x9c5d8e9c2e5d78753ef919163f0257a0f23ec2f155a2e4d0a3cc73879c8c6022. 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/QZES82006470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf888380b5b563130e810a16cb8dacadb20c49466a7f8135e4aec80a07709a782. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZ4JJ1976144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1090415700bd3e8e26fad7d36b3d55d3654b370ea98cf8d0bde8f2dfcdde3fb2. 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/QZ4JJ1976146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c594f52cecd902edbbc673ec4fad8c6fd3c49ef69f88798d33b6fa1333a85e8. 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/QZHN52096935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0832dbefc5c4325b6668dbdb33a72497e4a701b32392271c14ed72f628f7bf7. 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/QZHN92027366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c43939305aed0fff5251f51c17115493f21d3a63a35ab11da7b0a2363f37f03. 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/QZK6M2080422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafef1084a1ba8f7ddef87944bb06f603d12588cc33d3a283c9dd3c83a92fc3c. 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/QZDA42574824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e1c696b1aeadc176b7c53743640f7bb1968db259ebd17802dea4d810835482. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:25:31Z), 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/QZK6F2041525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277f05df8f9293c844d1cadbc61456abae5f963566d4288dbbcf6cb5ce6b4827. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDA52503992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f15d7837fbe1bc9b2d4197a40a3bab7281c2e4c2bb6ab0291a13b9803bb259f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZES82505379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541785d8fbb41d00010be6349bd96622c8df597596f1d832df595b3b6a6036fb. 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/QZK6N2566862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874edf900f71b93eaf5c02244473903d45d9d541699e62c3ead17d77b8c495ca. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZNWV2577550.