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 0x115a610a15e350c1d9fd35e37faf62996c8d670e4a14c0bc0cc1d3e565ea77f4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85f2be08-6989-4024-bc83-7a8d98477a58.json and https://artists.proofprofile.net/proofs/artist/85f2be08-6989-4024-bc83-7a8d98477a58.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 0xdb64805350cf1e6aeee30738e95d34c99c85617c23847cd5255804349b7af11e. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:10:51Z), 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/QZWFE2331155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060fa1503e1ef56bc5db87d459e2840fa3bb94a5cb83ade6e05090e7a087cb37. 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/QZWFE2331157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa469ba45f6215d9d89dd6849d916245a094af85438edb8998327faf2b876b236. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZWFE2331158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189d89b83e2b090b46b0fe78eec51132c1986a091644ba10d308b2f4f4831b56. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:03:07Z), 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/QZWFE2331160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6273219cdf73274ec12cbf4303fd45c9c582420da89e2567674b6aca531ada1. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZWFE2331161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab19a2fd3f06e6ca0fcee0aac95f4edd1f80a7104c375dfdcef2be523cd8a8f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZWFE2331163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb35927f71709a446d7f1a90887315746a4a1bdceca159e6e9339971292d3257. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZWFE2331164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf38fd3efe8e4e0de5277d1f98992bdb6bafccf929ce72f26206c9d12f48cca5. 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/QZWFE2331165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80373e08ab68d5795724e55019ed0c163087c08d1a747ec778e831421b99c06e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFE2331167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584a9341f969460807f99caf95a491c7a65a4b4b60fd6ea623bcd2fda05688ae. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:28:28Z), 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/QZWFE2331168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f7e47dd74035293de34e19e77f38aa43b964e8831a4ef1673a4ba92af27128. 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/QZWFE2331169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94f8a0c8b061e289cdb0ae04a79612001056735c72df96bfba7a1e61a70cd6e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZWFE2331170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6185cafd8d1c993863068f2b9f9dbc365949a0be4e7f76ba91fed22e77d46d0. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:04:40Z), 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/QZWFE2331171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9607ca62ca80625de20056f7b618b0ebe75777596da1b6bdf3c0ab60cad32f0b. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:43:26Z), 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/QZWFE2331172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de6a89c461da0843ca80a30ad4b79f106c4dc0b78c09d345cf2ee1084d45e3c. 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/QZWFE2331173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2168256ac502389eac67291f2f1af8b1cef4182965019f210d9b8bf5e7e9c694. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZNWS2503350.