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 0x9fba318500c7c6b2810031d1a5d226482ac22e0ac9c05d77a9ccf91024b992c5. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13f2a775-2aa6-4285-a33d-2bff3c7fbb21.json and https://artists.proofprofile.net/proofs/artist/13f2a775-2aa6-4285-a33d-2bff3c7fbb21.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 0x991128b8bc10bf9c751d6c027d08728f42583b7375ae75d73eafd343ea471794. 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/QZTB62576056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a89030f8de491e47b0c85001cad8f9be597cbdd1341e9b8212c2f963a1922b. 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/QZTB62579557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056b5a26356835d295b68eabc7e48e566b23846e4994765038172e79c4e6f928. 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/QZWFH2500259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5705adfe13d4d1b9934176459e79ffabac77de214e48d8870793ba901227ca8e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:51:55Z), 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/QZWFG2593826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071ba4d21d0c1a534d41914c80f9fde2474159b87339bec6e367621cb8689527. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:37:29Z), 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/QZWFH2550766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45220e57a089229d0d0a6abc4ff7e5c9a00c75c2700109413676964a3c396d2. 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/QZWFJ2552024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10bf44e83ded742f8850c62f0b5322bd54d09ef28b9ad51b0f5295da97e7b49. 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/QZWFJ2547693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6094162d6142030aec0bb6303c3bed45814ffb15adad41b2faed8dea4d73f0. 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/QZWFK2500689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e151e60deec9b630818817f382546721537046ec482bf1576e8da78b9e6aae. 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/QZWFK2543556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd852540268e085742327069e00d4d54f0a9719de4debd4eb3676be336340f1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFN2534592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbda7251047f71dd82cfe9befb32260384105c8f801beb74d22ebf077f0fac7. 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/QZWFN2565605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d28fbb31c8054cdd0ba2d68932336238558506725689fcb09ae4551e423631c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFQ2560695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4c957743b523bd6bf8c3430712ec6dd7804082604f03c1de93ddcad49274c3. 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/QZWFU2574753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e36d3779e9a127ad81a163c999d7c7ae467610e1a5aa5e679eb6423a86dc89. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZZ772539455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ec68aa1cd7ed649ec2828c8d417edb55226751dd98b47eb8c81ffb072e9615. 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/QZZ7Q2543199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4335fc295b99893aa77a7c9223ed5b8105ebc5eb895d9a29b573f9394b476e. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZZ7Q2545386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563541d7ed8bf55604765a5c63f38515e0dd8070744cc1411472ae4b3bff4f19. 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/QZZ7W2581918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f38a2d520c214d91e959b1699732573c6be6c8a46f87627da65b34f9fbb79a. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:54:15Z), 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/QZZ7X2552081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454b8973a137fc65442c2412f0e3b38194ce88cd53fb325519247ff79e98c19f. 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/QT3F52569375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5c73f472b463c037789092806844019b23fc5c63dc99739948577c05abd84f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QT3F72536721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40fbbf2548482038bf09f4b9cbfe34165c884380706ac8060aaba7d1afda9b5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3F82541098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b0801a15be3490a6f9707ce8e716db9a5cecf867e9dd792f074af9f7cd7384. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3FB2599098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cf10b47fb5f69fb3f19bf4f1a0a84ff9273fa2cab88447b775b0a7d9b2881c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT6E72552409.