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 0x4d2c77335c882bc002401317e2a688e47cc6869a5adb0342e5b9c4ab1010cf1e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd39c4b9-8fe5-43b2-acc7-a9bdfe877ef9.json and https://artists.proofprofile.net/proofs/artist/bd39c4b9-8fe5-43b2-acc7-a9bdfe877ef9.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 0xfca2f222de5cf272224365433553df54c425a0a480891aeedd936bce0863a156. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZTB82429258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15370b6247301e89e646d3a005cab159a13ad4459692d823d5127b482164c5cf. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:47:02Z), 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/QZPLS2484597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e0b0101b3f10923a0e417b9a623a6eaebdbc0fd8ddb0c52b652f818a5e1a9b. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZTB82429259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70333debfb427b526ba70558390acc627b871050ec186e3b1a0004a15047d84. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:57:57Z), 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/QZTB82429260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6353191f13cae30ae306e913d9ae0e6b47c572ba4cb8b7f4e14561b948dbe0ba. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:10:50Z), 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/QZWFN2413662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43d6674630193f9697b50eb5adcc107ff12cda2e3e0193a89a6c284fb8d15ee. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTB82429261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea5440f8eed22af88d1e9fdd37782b74e55011f7ae750335add6f723fc0e376. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:51:09Z), 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/QZRP52467016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338b5d35bf03f75475e0552f732bd3d6f0f1f9e89cbf455c0cafde065adb13a0. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTB82429266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe724d0a3aa2e27bc7c18cb4e9a4f6ef251f39f8085d86903bdcc98766e3c4f67. 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/QZTB82429265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd033ad5a4c2c78d814351dad4023471c16a35cee3e06c320842c0dd731e590d1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:08:40Z), 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/QZTB82429264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e50d09f404320e066edd6f18b62d7d517c56c55f98a0cdf5729e6d67b9d123d. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZTB82429263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5941c57916973255493a1e7d6c1a92f3a75bf77a9f5ff8121994fe072f7a9ab2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFYX2401810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843076a04e8888ee17849a5e810fdedc40ce2bd9cd5d44b0d8cc8d30846a0b51. 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/QZTAX2525754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6d1ba378b0384b5bb84ebacb418bc1331ad65fbf788940dc8803c6f35dbba5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFF2593542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7b458d2d932fe68d287eff04473cbd6f01169af90ad7bd4a8a03f3f4b03486. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFM2544974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48041c601d97809aa501214dd33393773648d15cae457d7e257ff8885c0781fb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7X2556784.