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 0x5835e6ea71da8402934359067711997773af370d0d88721d76e99894705d4d3d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93f7f1d2-842b-4c7b-be7b-ac1aad78bd47.json and https://artists.proofprofile.net/proofs/artist/93f7f1d2-842b-4c7b-be7b-ac1aad78bd47.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 0xf0f65a817192388f0168ad0e757b40e66b14baf8915194aa7593e8d471f48c52. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFX2403399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c319207947887f1296d09e42ea6efe15d1e11d234b48fc7733982ceef4186fd. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZFYX2568752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07a7bbc76faecd525f4eb7c346f8afae520c5895f360e3b34e196ac452d10a3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:00:39Z), 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/QZFZ22508557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b87da6e800245af4d7f8768936c6932747f0f13eef452510056412fa749a76. 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/QZFZ62511369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0932287cb938917071d670cb0301a8dda0f9bcfd7968d4640c62e9d5ff229e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZFZ72596173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10e34443822f324717a74fc5ca3283b74c522e88f3338271cf39ac7cf468c82. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:33:31Z), 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/QZDA42580876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72c45eddd58300719d1de79add2b9a4778c70d10095cd1527f7f7b749f0a05c. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZDA62567466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518b9f7eedab6e2d22ebdc14d0cbb948f3e73f7e8fbf53a30b0299411cd1536d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZDA62565726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e7de4fc0d9558ae255938fe037203806a1e400301f83535c06508e6e9c23df. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:07:29Z), 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/QZDA62567469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b861dc93f9484b4b6805269cde4f39df4e5f4c48f12a78fad12713e320309f1. 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/QZK6N2545497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c991553030978843e5a7594ab6c09db0d93e7fbe83cac00fa5d6b51d5497b1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZMEP2533424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c402f89d112ca03036061ecc00b87ed79940a7e7f2472830063b26370ce8da2. 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/QZNWU2511821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e354117c51143b37b81f20a3db056e1826b8f9a2ba39635aaffb53a9040d0eb. 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/QZNWX2558453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3bc44b28f5d4086d488469b251ccc150205600269d7f40f07e9804f74b249d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWX2558456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5899195a35fb512b96483062e72f85124febf327a3dcacd4e5465590c5aa6d1. 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/QZTBA2560961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f428ba5686b4b0b51816670faca256f9b95a7a35ee8b739d3d112742e0d90dc. 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/QZWFV2556683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd816bcbf1b23166753bd5cc6df7a4be816ecdd8f88ec16b582b2dfebf182277f. 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/QT3FE2573429.