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 0xd9d225fbd654fc2aa742127e4bc4c5ddf307d4b870b4b32156ff382662aeca37. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40ce1a07-be13-4c9b-a298-30379d4bfc9f.json and https://artists.proofprofile.net/proofs/artist/40ce1a07-be13-4c9b-a298-30379d4bfc9f.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 0xe756872f9eea3d9540a86552fa70ea616464ea7bf1f0b08b90dc3f1b346ff4e6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKZJ72201069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67081f6aaa8cbae2b505a8ce67d15bcd521a7e7cd02997a19d46cdf69a918522. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b387a57c4a431c74d16c442a9c6e12da14f905913b6f88d1d3fa6250ab586a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2356b8ebf5e904c55ef1c8f51f76953436b2cc6b14695f1e220df3f1f9740788. 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/UKZJ72201063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eae04062ee74dc7ec23c43001c85feee538c5af9fcde2a0c9a5d49d4cfc95fa. 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/UKZJ72201065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faf5db05efbecd0c8d3dd2fb0befe9d35ae47269f7b7059c907743711bffc15. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb0ceb7e4a1168a5cbe56e03c0335bcd118ca35c5a6f33c8f9f8ba10e4ba574. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed89cbe1b3a9fb82160f282459a8994478946c075ff3b7d907485de5b93e95f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea334c8cb16a0f5da7b4aadd2c789a1dc2ddbbf8da9e2cfafd4ab2661d263f7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UKZJ72201079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18040b2b0d37c21404345d54b164dc91504da06d6b54a5875b9d2ac43adff38c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86acf161e41ad266da2f077c512e3715353bb7851359b9b76ab62168ae5c4632. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:56Z), 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/UKZJ72201070.
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 0x58a834a9f1e112958ba8a69a087150a5a3cac3bffa648a73e38c8c2fa87d1a10. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UKZJ72201077.
Hollywood Through the Streets of Famous Actors
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cac567a1c933fee54a7e41071e1505998185a8e0c0381bcf1ad96100fc23c72. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68727f1cbaf18bc0840666d4bd346a86bcc376be9b65925636d6151f8d5122e0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKZJ72201050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdd805f79f26742d4adf90f9753adbecb4a2942eb8414c7ef2565f52b21551d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a65a2b52b55b48a61762f27eb739aab7d142f3c7b4075edbe35c2d26819b09. 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/UKZJ72201048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e24d40fad3b9a262df8bd17951e42b229de0a6c74ccc37ad3b61ba2da1aec0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7547af1ad0984150a863ab461085e7d54a8feb327517ab118d54a66cb230ef7c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0601874d7700f57bdb3dea88da08cdf4c9c245dbe68bbd5e412e747ec0d795b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/UKZJ72201057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b5f7a07bb82cb32cd913eaee15bde092d60d36f52e482648309f169aa1d2d1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UKZJ72201003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa0e680fc4a6065628918ccd75923683b17081a3c4e24f616408657a3df835c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd503ed03d631a57d23938b07aca331c9fb0b779177f049cca09e68b637f1bd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1622079c1324c8ec30a526d278d6884ded764cd303d8e042a2907c0943441bf4. 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/UKZJ72201005.
I Dream of the Three Card Game in the Street
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d3f41a7febd491d97966e1abe04f0c0f739e47366552adf9f719481e8bd52a. 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/UKZJ72201007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b92844c7745c6dd972240b9877ec0ae13851a0deec2ad74a4f1bfea739bab3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8439d35903f8340d4d4efdc38925aedf0069381b749ebcfa99f6ef57863e64. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8278222194bd4710d4e4cf94565447ac93479d19d95bd10cdc9aec20c3dd08d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c90a5227acdfb564fa543bcf9c5b5c34f15237532bdc22d80233327f7ddd427. 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/UKZJ72201014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f12e9f7b574f8475927df64bf19dd025f5bf654c0d3af8e513ed959d43657a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZJ72201017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7745006f5ab4844c51d9b7f3a629ca447833037a4b3471129755830bb0a5d90e. 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/UKZJ72201019.