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 0x01861bc4f41d5367d6f1e86f9752048c5913db735b2e20b3f0ccb2d6a12b351d. 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/3b4a3a35-65ab-4fe4-bbe4-ccb5089d19b9.json and https://artists.proofprofile.net/proofs/artist/3b4a3a35-65ab-4fe4-bbe4-ccb5089d19b9.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 0x456c9365cf341a8df78421cd7a56cee8b997c561556036548f41ce018f53dc71. 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/GB8KE2327032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb3df6e89cf8dba08e5b8829a55ba469e2571826b0bb4584776f057348d1e29. 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/GB8KE2415187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f90367028b98076f61a761e85baa45c9ffefde0ff8f35fd599e02a285c2e8f4. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/GB8KE2418733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc03317525c071756f3b1e6d3330e3b2bce61790268b492d14c594fb5392d69. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:23Z), 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/GB8KE2421319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c20f41e9f855b028f8c9203b4c770689be87f7ad4f8c2c84bcc0663e10a6f3. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:03:24Z), 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/GB8KE2422113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1206b2b6fadbb6718bbe189923d5e6304e23a1c05d077d367512504a965aee20. 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/GB8KE2426294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cf914c1f5181196f5ee0dcd66bb9ad89b6f7d65fdca713ad43da5384e3a332. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GB8KE2504300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f99db03e9f832e542424ee371d9ca5e25f6683deb953dfeb3c672290617bbc7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GB8KE2507577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55aca8b0c1066ca82131e030c225922a40756574bb50c2db6d408be8413d6e35. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GB8KE2508518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a22f66444f47dfa805a7d489fe4f8244067c8dbffa0843f8973131d04b2f8f. 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/GB8KE2509556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a4479c8170e47450795e88d3c495bb6cca96426cc0e0dea3ba4c2c94284e5a. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/GB8KE2514136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d94c4ddfb7191aa935adb528a72875a689395a82cd47a326d3a12bdc3ad031e. 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/GB8KE2515080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ea04f90ac21752a8674801434e1975ceaa5af24e4125ef2376dadf460a0117. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/GB8KE2515081.