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 0x209a3af825ce7ee19b7e4e2c721befa4c31678a8a6ed67757d93195ab4001b44. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8f63dad-8014-4014-891b-8c0ecec80a16.json and https://artists.proofprofile.net/proofs/artist/d8f63dad-8014-4014-891b-8c0ecec80a16.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 0x8e92765722f488463e283dacd4d8be9182a58253407de0ae03640e4eba22153e. 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/GX8KD2546400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b8897fdcadb9aab79f095c89d33611af233bcc1b29392bbe76fb91309a6194. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:39:55Z), 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/GX8KD2519754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb39bc83b64c8972369d731886dd352428cb271f7808aebb182cbdef381bd5ea. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GX8KD2545771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c717585e79023053a3393efcc08e20fe2422b8cb2fdc9a4e1f637cd1a1b7498. 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/GX8KD2578887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638ad6fed867646c6b243ddf05f3db5dff703fa2d9ebb445af2d9d15136a288b. 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/GX8KD2564744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7207a2139c8b94a910d0c5168d9c6126e117dcc24667ec2ad2594c83609af7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:58:28Z), 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/GX8KD2524222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7995c295ef06fe6991705358d3c084e712456df0ce7be60f6260b1776db46e0c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GX8KD2559911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc3955e14c1d051aea611375d89a9d8abfb46611935cd0612865e66e4b5886f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX8KD2583478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8a97f95118e650e032640be1e2c8c7a55aa0694a16ad433253f08ebfd4ab57. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GX8KD2538442.