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 0x40272c8c3d4009e6046ef05970f12bc55f79e5cd49b0c163124cb004d37da87f. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/281ae96e-1dfe-485a-a163-c8db02d1a6bb.json and https://artists.proofprofile.net/proofs/artist/281ae96e-1dfe-485a-a163-c8db02d1a6bb.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 0xd5d14c8261d83929b27c88c37b7c2b66bc0ae1647d8f184638bf8be5e7cb90c0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZDA72132129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03c95cc4a5c44ab0619df71188f10214b51079b7be50cff7d59d92afd951d9c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA82133848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014c70b3a6dc9e3c59f11f74a3b52e9f0edbe6c27978337e32e9a584d9341227. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA82133849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1d84edaa4c571cf507fc41a058b84ba3accc4a367e0fe03dc426184f7a9252. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZDA82133853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cadc13cd4ed3c95a95ad63ca09dd267301068f55c3b4a783a80f3ae8ab0c353. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZDA82133855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabf7fceacd68c4a9bcd9bbe6f12b74dc809ccf2818095950268568cd3c3e5f4. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZDA82133857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d662221e6dd1c7d5a3f9d0b103e8de2f5f37a41b72dbf202642fb5db74705de. 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/QZNWR2293232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abe0cb1bc6135b1e0defef053c6e469515abc65dcdd2c07bb29e2b73c12ba10. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWR2292582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461a1c61d14230d7ceb9cc27e77f46a9de17835629b086aabf8a464a756f5b33. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTBA2202949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c61e89b1557d0d5f1e4f7aa6535a9561a2c98d142351a2bfbe4ad29c2ef2ca4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWR2293233.
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