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 0x80b63dcf1aeb7e55bdeab02963440b089868c4e9dc0e03cbdedc2d5819e10c07. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a1183a5-0d22-433c-ba41-f8cd81da1419.json and https://artists.proofprofile.net/proofs/artist/3a1183a5-0d22-433c-ba41-f8cd81da1419.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 0x9d08161beecd5b51a8d5f573f6c827044de5c1c060ad76d1bcd7df28cb88f9ad. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:53:16Z), 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/DEM401600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957123f431e42970339a2cebc0fed77b5c9c05cbd4cfa1636df3f238b7f1de12. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEQ121427684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce838cb7ba244112b31c67f5718f74bc82cbf9c4754b11afb4cf793a8e869670. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DEQ121427677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3ee4284b1d6ef94eda327f86b3f3b97afb683d8797d95168d914586c98bcf0. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/DEC611000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcfa2c46dc56911645675a12364363a658515ac5e34350ee38fac1a8003c240. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:23:02Z), 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/DEM401600035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e82bac81aec2a1a15f6ec2a138b4762a8fd221039c5c155a29176529cc86434. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:10:13Z), 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/DEC611100610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7c9db04d9b279532ee97bf92d38e91449764942af60d8ff10dd2c1d419d3d4. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:02:46Z), 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/DEM401600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329de8ec8fd505a72f842aae6703c142d6d70f9e09bb056d87a2c56072059d3e. 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/DEM401600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c59fadd90d4a6987467591707a7bc83f04e497241c4bb7aadc7b2a5e25fcd3. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:05Z), 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/DEM401600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb617cd79b0d500f0f7d4e46361676550f7b155f9098e41eedf9e3a728a789ba. 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/DEQ121427679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3daf91155154863c9453318d97f53970f56e6d1db020904536da9053c5dc78. 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/DEA810200766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ed0ff2c1f4a867e91ffb97a25d601a9f1826805f3e121987baef56c5714035. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEQM61802569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17f639157081c0a3a0d2db619603964956e0e6d67b2aaa951c287329120a3f6. 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/DEQ121427675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6259bb0800f1643c72b2158d0709a7e4212abfb4231d9f7b8d4d08a82dfc39d8. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEC611000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535776e23d72dd2be4d1202795e579bef895eacbad1a55d9c313a5f4241f7686. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:12:10Z), 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/DEQM62003359.