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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2710a840c071cc98052cca4fbad912b5977198cb263a386061b4701e9935a244. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/835e61dc-5033-4099-baa1-ff0b7c8b09a2.json and https://artists.proofprofile.net/proofs/artist/835e61dc-5033-4099-baa1-ff0b7c8b09a2.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac330a1f914d3c44205b480dc33c4b8e445fe5158c78a1627ec0fdd595190a32. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA030900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8654ff5cdfccf210bcd7c33963c99aef0d5f7eece805c0c0e9d229b3c61450. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/HUA030900219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe119562cfa0792d97c4cee1aa9c59ccda3431adc60ab37600fdf91d8c1a69ef8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUA030900220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65fd69fec09d9bd7a1a2983eaf3a33e018cfa00847120a1a38bbc0fd8444cff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HUA030900221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebcee06be7c55717163e7ac556f0bf09258719560b2793e243b43dcfc603207. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HUA030900222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a46863565326d4cfcbedad8f850d6093962bf5e770a0bde0f6c03b66c6db9cf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUA030900223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2782bdf8bae9c60b32005a1907f333077943ec9efecb0f82a21ba96b48f9bdc5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUA030900224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd750a0dd7529d35dd3c93b237b9a43c83b1103391306831509320fd8ef53a1d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUA030900225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc74e7843a0402851300970c233e858bec71d1c58e6beb855fcb33c318a4c509. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUA030900226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0dac9ee947c6082ff072ed749d7b8b0ac3d4dd5091894d9dd302d593e584f7. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/HUA030900227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5c71bd43edb39a8fe7d3e9e9d38450989474272515c527b881e526467740a8. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/HUA030900228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136ffc3752929c415e775550876647c9397687cc60a4f7a6bc6c4d2e60b0a57e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HUA030900229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06971edae832fd9f8a6acb535b52a9c4eb04dcb022911b6ce1888d84a68a0d98. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HUA030900230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d40e7e28e02a03173f145a3e2dc3ee3e80919caf43e620fcce914db0c9f4c2b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUA030900231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6af6618d7ade585f35aec69c7cbf95691168c85c0f4f65a98deb29bbc015301. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HUA030900232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004735ec4db69e381fa0cbca18536d1da21cfe19be144bb365cee1934b2aaa5c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HUA030900233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edf9c315e8cd47b18995fa5ac59fd49e729cd54977deee4f15e3ca767bf7923. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/HUA030900234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab7be3d31c1323d19efcd827e6254a732782604962df3cc7588dbb2a5a49d82. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUA030900235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e700042822f496dc39a1e4d4916789a5ebd750233532dc11872c6552a24870b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/HUA030900236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf8fbce7cfcaf637ba41a4091c8eb74744b5089de0320e4cc465ed4cacbdf9d. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/HUA257102501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383669127b22bbd1629bbd52150f1a3f5e73696c4777e5537df4a8dab3b5024b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HUA257102502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3d1f9a4ae1839e08b4dd4da666b77230679f1c3b4de515425aee03fc33016b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUA257102503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa476ed37d1a834f7ec50671a5d35329803e445228d0fa085c8008b5a7e805eca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUA257102505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dc3c88b337600e2951bf43cb739aaf71aaf93e20b2fa792451449ca7856c26. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/HUA257102506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3292c1eb210e0414dfc4ba08006bb2c83349556ae8ccbc69a9e9ebe5158cd7d1. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/HUA257102507.
Tangó - Itt van pedig senki se hívta - Ragaszthatatlan szív
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402dd2189ce3f0871fc65f218ac08852632816d3e64d994ded6f95a493cd54a4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUA257102510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0af0837b795817fd41286a3911fe902ba05ad35e179843e28ba51a8751e5dd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUA257102513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1487e872fd1ce01fbe5759abdcbea9198cc0f801a5312a40da8963cf248348. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA257102514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a23590e3af4a794d55968362c656720a02df6b470badd4f700a8555cef3b1f. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/HUA257102515.