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 0x29d2843e71d92ea77e1781b04e174d9eb6806bfbce93ed5d4177285ebc27d83c. 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/53dc9514-e2cf-42d6-9745-bc8d1f041a9c.json and https://artists.proofprofile.net/proofs/artist/53dc9514-e2cf-42d6-9745-bc8d1f041a9c.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 0xdf11f9b7dfeae4201727052e60c8f15bbe628304f351d8e1e5bc9f7ff70595d9. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:13Z), 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/QZMEN2456745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e0ea189cd5ad67542b3945040829c0791839238dd72ce797d56f448b31df0c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEP2483445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989ff2d9e352909bea0367ce47d23d952601b632ef93234871d23f9a484aadb9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWQ2468535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb785904e74ccc35246c9d6783373cb13a9f20ebd6fe5ad26250d8fa83ab36c4. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:04:38Z), 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/QZNWQ2468558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cda12520ad4b182cdce3cfd1548c190bffe477ded0e1b9000c7a8ad58f8533. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAIQ2496843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829174fdccc8277708f4011d274aa189c7352b090bbcb73bf8c20e9cee48722a. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/TCAIR2496852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a187af405b52bede8298a4b94da2ecbd1a99351ca2f1f649c2423309e9fba6e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAIQ2496864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecf7baa44036e91a71559cf71194def5ec0e1d71d913a9c8edc91737f1f7729. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCAJF2501979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecf7baa44036e91a71559cf71194def5ec0e1d71d913a9c8edc91737f1f7729. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAJF2501979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4684fa9e49e51a63f3e1ad0621b1dbd6e1b93fb76eaca88236e4d9edf31fd12a. 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/TCAJL2534518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4927d33444e468cd3fdd147ce79844cb3bfc295ba2b3ed64c7e31fa1aa5d42c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBD2515191.