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 0xe297b609b9bc684dccb164214be7bd34f99cb504241fe3a97a02f7169d5309b5. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93bdf036-1310-4b0c-be4c-ad502c9954a3.json and https://artists.proofprofile.net/proofs/artist/93bdf036-1310-4b0c-be4c-ad502c9954a3.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 0x4fab3a926d0e404ce8bbd332873c9c557b825d0ee27bc9214805185d0b85a6fd. 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/QZHNA2520268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2b8c2d47ef438eb61b5582c2f082b07045f686d7fdcbe06a91cb3ead46ae88. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:33:07Z), 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/QZHNA2520269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a4ffa763067083d6ff081f4d1eac1338deedde0e367a69722aafc060cdd4f4. 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/QZHNA2520270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83acbf7e69773c92ee2fcd1ffdcf4a1074a2a30fe5ae32bd81bb392235ab9253. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZHNA2520271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31473348a4935ef94ee8065c85c1be6c9dd27592d1a034b0cf98ae1f9e189f73. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHNA2520272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1daec97a50a0c54cffcd8df56a23e88c13b4e0b50cec989444b0b0f4a332532. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNA2520273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc265ed6625ba0dba5b44257806ddd7402e3724f04184c304c7e8420f5bfcd0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHNA2520274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1754091c6b2f1b0fb4462c5e739ffeb48603d1ddb9aaff245250a517e9774ff. 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/QZHNA2520275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e0f714878bb14fdec5034d75425189e1f01cd1282ff832210b962cc54d85e1. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:01:31Z), 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/QZHNA2520276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215c41a03ea9890c720b8c76dbb9533e1bca1550c677f579dd6b38ef8b5c9823. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZHNA2520277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652bbef5919bb5e27e46345720a4c6aa71b2bb088cfe89f463bbdbe230b77f00. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHNA2520278.