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 0xcb55f6bde171e8a9d550039a7d7d7858c03e128de6ef3932a70d1d8ccb3a39f8. 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/a9d494c0-c021-44c5-874d-563b862fe7be.json and https://artists.proofprofile.net/proofs/artist/a9d494c0-c021-44c5-874d-563b862fe7be.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 0x572918c74121a4d4bff4cfdba93c2c68d55ec9a4b555f64e4a25077c9d15f7fe. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:25:48Z), 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/TCAJC2401550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb512230bbf5c14d9cfbc3b2e0444c109288aafaf981ade9a611b1c2130ae24f3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:32:03Z), 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/TCAJC2401965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f87326e032379e32110441722c7971a971c0afd15f463fc3b75189c250a0f85. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAJC2407331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84392fb495cb12edf83a350058baedbbf4f88d35e10137bd9571773744239cc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJC2407049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec56c67f8d37f3e27c9d0fa7214e3f7dad0b9c4457c01b7e8f503af16e27e871. 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/TCAJC2407374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a999f2f56d4bd571aaf11b69ca64c72b4bb53e123314e0f275c1e943361786a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:31:45Z), 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/TCAJD2406707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694974d60d1a21c839c594664c415f44f3e673ff6e4dc4e5171dca3e2c6f9edf. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAJC2407447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b568e057aeca007c0c357ec2c3611f701d0ecebff5af77acbeaee4ec98ac85f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAJC2407559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3113a2ba6f606c5e8f6fe79db1ef9f2afd157e70af94dda75c0bfef1837d4d6a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBWUL2515776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfd83f9587d9f6698877a1a45cabd94d5c036680a746387d72fabef3f72df70. 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/GBWUL2514162.