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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86860f7adfca42cf53c9232d8e702ad69c3a38cde3608e6f562ba554f840f79. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc6f682f-4453-46c5-916e-8246969ae10c.json and https://artists.proofprofile.net/proofs/artist/fc6f682f-4453-46c5-916e-8246969ae10c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524e54d9fa4004db02a756e55647dab3810c8e26e694a2f2bd6de9bc332e0ebe. 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/GBMUE1800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c97372f01a4c136b501022465e8287b491fcd95340519ce9b668bb446340eb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBMUE2300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720e5d7b0cc5aa225ec29638eda6ffe80a398e99989f5834ba58795eb0c6cf6a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBMUE2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01aeb43869cd3893c4d319c8dc77fe3cdf9809716dae9234436621d37eb08e7. 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/QZNWQ2562502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e003dea20596168f52f066b034dfc80eadec06a8950beb0e80d03c763ff6c4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBMUE2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a02afc3a2b438875945263aaf37968c44c65024ea9eb9370a2a13bd3ecacc8a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GBMUE2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720e5d7b0cc5aa225ec29638eda6ffe80a398e99989f5834ba58795eb0c6cf6a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBMUE2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c97372f01a4c136b501022465e8287b491fcd95340519ce9b668bb446340eb. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBMUE2300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc189bede9dad5fc268349cd5d381a5a49dfb47e89de258685e1c4845b4a30447. 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/GBMUE2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720e5d7b0cc5aa225ec29638eda6ffe80a398e99989f5834ba58795eb0c6cf6a. 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/GBMUE2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c97372f01a4c136b501022465e8287b491fcd95340519ce9b668bb446340eb. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GBMUE2300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a02afc3a2b438875945263aaf37968c44c65024ea9eb9370a2a13bd3ecacc8a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBMUE2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e003dea20596168f52f066b034dfc80eadec06a8950beb0e80d03c763ff6c4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBMUE2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d9e4e625b50d6a893c37bbd5c9a43a4ce43f267d526c268ac165fda942a291. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GBMUE2400062.