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 0x3bf62652388d4daf81ec15066f6843622019a8a62cb930bd7e582096771a4458. 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/d222156d-69a5-440e-a069-c6bcc10858c0.json and https://artists.proofprofile.net/proofs/artist/d222156d-69a5-440e-a069-c6bcc10858c0.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 0x3557b41022ff9c8c1bce1f9ae71456d4fa35df4ee3b1190883efd6ce6815e02d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFYY2116865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb63add69ed060259e2d542b482d8302f646cbd2eb848ab4411535e4fbaec3f2. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZFZ52157878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed995f049048cb8ff7ee3d7caabed7c783260f89e1b414ecee8c9f476f050c19. 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/NLCK41091299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2859b51a713998ed1cfaa7afaf430e6b16006612bfff046be683b3693629a5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLCK41093434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa397752ae2e8104a775bcf98be4af281f75caf430aed16c9dd42b2de93468d. 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/NLCK41093435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc7fe15cf5aa766be404974c0f5860a91a6d7f74005a8618bf060d00b2d3b0d. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:07:31Z), 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/NLCK41094897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dfc406a401450d396e741b65e7297cc9e57ad66237090b37870cf64361eacf. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:45:56Z), 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/NLCK42212541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04eb3aae0f67d200c58505241f11b3df31fa472bd005c04e4e042e77759700cd. 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/NLCK42225464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1860c552ce16a233e00f14ffae18dde78e618ed877679f9556cd2a860fc2521a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:38:36Z), 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/NLCK42228260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780b12061e76e1e32e4c1f1ad8fd0f06153784b6fc87cc012c47c9f8dc9b7443. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:06:05Z), 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/NLCK42237552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb0f804a4b91e5fb8c5cd1d6601a9d1d8fceb744ad538a9aabfe28e50a86587. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:24Z), 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/NLCK42401253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aca7182042770e2558137e6fe40473e01683512a541db4c1598dd7f9dc6fa38. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM6P42405460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646ea9b9dad8cc68ac03aa155fcdeff1643e8f5e390c803db15c2cade1a06ce5. 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/QMDA62596995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28872eae2e84ebb953e8aa7219cb42db35d23efb72c6eef2da39691a67ffb5f8. 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/QMDA62596996.