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 0x7c5b67a0f7fe80c05c21606dad430b6391a15ee9f8025357fd5d76e4f2d6bea1. 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/cab68488-39dd-4a00-906c-42b4181faf1d.json and https://artists.proofprofile.net/proofs/artist/cab68488-39dd-4a00-906c-42b4181faf1d.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 0x3124022910c2e40023646fe2a1f8dc74f80d19e814d5c6a4916d93704ffff7c7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ772567603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249effba63e11be0c6709df889a0330639666f81d9cb225b51c94cf8984fb281. 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/QZNWY2230811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fe80433cca6db344b10a3d8bd05539e11654ee1fdbdea41b9824c55e203c05. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:36:02Z), 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/QZTAT2283861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d30f2f7b1b6489a6af39dbe74274002dd732219b3958e5ba022ba1b0498e51. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZRP52204340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a624ad65ea27e3a74a55bf7c5848f778a15938b366c47f6603c8e024926ba43. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZRP42241140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1efb9a0b198dc0347cbc0fde8eb2c3aa84b21b80b1f20a77acfbad86681537c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZPLS2231071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0995b31030a165a6ef2f597f68bd3e73bf9e9d59bf1b5d7b299c6fdd3a7ac148. 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/QZNWU2268698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396351a882e30a325649b3ef5e722d76896eed5be16c77c6c246775957085dd3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:25:43Z), 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/QZTB22200728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8466b4b885c9b4c1a92b46db70ae953fbb5331726e16369743c49ce0af552de4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:56:47Z), 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/QZTB22286406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c34ba72c9e3c1e3e9da83cded896b5a910a39c94a03ee56e3001b1c6e0acafd. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:18:08Z), 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/QZTB32272358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e582c6fc19472ca9fe742edc231f163e9167f16b660411411e83766828f8cc0. 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/QZTB42242547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d69e155868ca0fc83a335c59bddea82f1d72d031ded2da7b0fa6e2a30c2aaf3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTB52228760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3cbf0fe4a12bd48c3b0653248f877d179ea2ef5f2646db43ee637f00e1ef52. 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/QZTBB2227125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb95c05530888ef0fe2c124cbfed72fd3246b784cde3a48f5e3653fda628d61f. 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/QZFYY2314907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3784a4982a9c068754d112513117a7bcd95c530a2bd0723ebcf49d4f2fd921ad. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZFYZ2394796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bc9dfa0e68133f6abc11a5eedb902ac09ba2b8d5557dfff8fef20f00c530fb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA52519315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215c752288d6e25d3c6fa7941ec78a84909b5a561be6c2cfa126dda8fa58383a. 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/QZDA52519316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299d9735db5701d5b614082832ccabe862603dc05311c03f36b5cecd4d36d98f. 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/QZDA52519317.