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 0x9529a0d72a5c92ab4ef52479d12d4817cdb72ec8166a4e4965a7310fd1766547. 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/03c2a91d-ef3d-4bed-8f56-a2b1e027efa3.json and https://artists.proofprofile.net/proofs/artist/03c2a91d-ef3d-4bed-8f56-a2b1e027efa3.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 0x1f10de54a7989695f8468b66540e1fb678e6b5e7a44c819fa5f49facb0d15452. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN82194831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8494e60ce375985949a49e3cb6737e22642acde8bdbfac4ea1b23312f1d3de62. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWW2190308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56447bcd736844968a07a791d0ccdd2e3f0a45671e285462e58eb70c14ac3b8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMER2305850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44c1f7525dd9ca3789f6f985547bb71be01979152649e4051701bccecea4636. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:50Z), 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/QZRP42310258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d83a5bd21c49f1dd9b61c7221d490cd103fd47e5a3201f716ec7327ecc039ea. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZTB32335772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deb7e6a672d74c5ec685427f8d82e0a629aa13791196a2de9b32f223569f9ba. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZWFK2319968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb38e76bf767766bcd446d30cb604b93948be3bb5e4a4775b56b656855c7fc48. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHN72453519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5d8303ff43ca6844499b9f408dc3cb68bdc11ea2b6fc48c86225003ee33781. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:16:40Z), 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/QZMHL2439485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236b5e6301fd24719bb94ecdb8f33e2c13e5ce93adaf97612a983109a27491c7. 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/QZWFH2421832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8afaa83611c0f1cef9ac901d445c80042da92024a9ee987d1743f9e49ffe10. 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/QZZ7M2483546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008556ea3260574857f73bca03cfb1b428f54d166e837a8171d97a925e96ec93. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:02:02Z), 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/QT3F42447629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cbfa6b1361cbbe0e856b27250c3abe5680203ff368fc9c7dfa4320b100f47b. 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/QZDA62507300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6f084a2d8c24ce905e9eb472d2d8239259f72bcf516847d606fc4da39b74e5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEP2586162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffe4c0d0a0945a40ef95567cb6d6cf0e57590a20f363b55e9f066fb3fb54bd1. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZPLR2592029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9795072beb10e4020a4fd99ebbfe25afa99079caeb133d6fe834b374a1463fc2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ62104775.