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 0x7bfe480ef7485ad75cf741b50d4e39c22d8afbe49d826f66e0943c6fee0a8788. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60097966-a29c-4769-a643-15412e7695b1.json and https://artists.proofprofile.net/proofs/artist/60097966-a29c-4769-a643-15412e7695b1.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 0x4c3069a8bc7fc3beb0a8f349aa181083c9c71f896e16919a5b73b23a4e1a9ff7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZ93L2105371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68cf66460e6df300689f59452da234d830f67910ac4ec9035cf63a17db22894. 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/QZ93L2102733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf09eaec3528976af3df25549dcf65f698349cff8a64f9c05420820b2f5bfcef. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZ93L2047095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dd66aaeede58663c57e1236778ac184eb1fe3ce8ba3c2efdb9c3bc9328a9ca. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZ93L2054707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51c8338923f08c9c4ae5cccacac739e359867302516babbe968b5ba0d325ad7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USDA12206617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38e1fd0b111911a173fb8fc93f930a2d377a6cda909b95ec69c8ef372aa50a0. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/USDA12206625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b409be776d12c873fc74079227c4f04dad5c8170f68748b2d29460a16972b7. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USDA12206629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531282425284255eb24ace14ba3ebbe73b2b73c6772164bc66c3e5ecf53d1b7b. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZWDD2267570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9781977573df752ca76737727ff45c2860b3211c3c3874b609776f7d956965da. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:28:46Z), 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/TCAGA2228675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b5a38ed3afdc0bad8018f3f7eaba3a8a1e77120a820e11cd3f15e5011e7466. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCAGB2221526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa8724d749539308da44016c340611db7c1ae8eafd01657898a0bcf9d68b3e2. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZ5FN2337083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbd142b90518ee385e9c6e0c32b9c3e3a32178793165f0f8969fd019b7f99a2. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:04:27Z), 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/TCAGE2241214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e6c71dac702a6078770cc5904e17cb5b2fb2f661269eb887478cb1f8e5d591. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USA2P2453403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23297c6a7db30c3b643705f440bf3c621c1f949fa318ef1916959059dd7f206e. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:10:35Z), 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/USA2P2458468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088422c9c1457ec7b5399424ede7829f227be2cc2d4c73de7be269445afd278e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2462110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd1e236d9a45fc2ae27dfcca179180497b60b93c4f2d7a8c59c913120c384e1. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/USA2P2462112.