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 0x4b68b75f585b19e75cab7da04de9cc34a91aac8f87fa5d5b38589b948655de1a. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94978cf3-5478-4674-9568-bd0c31c471ab.json and https://artists.proofprofile.net/proofs/artist/94978cf3-5478-4674-9568-bd0c31c471ab.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 0x96ce47ba3bfac085813a90a25945f7878f6c9f55fca66e71da960159cce0a173. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCABW1451337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d634e221d4d5c64903e939c4ffedb7016a845f5594951f5e2d12c1008d0692. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCABW1451339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe871a029dc8349bf7f0581784d4a8918299e044d0d91f6048ac93d7b1d78f476. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCABW1451348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec0559f32c60c50a3cee00d14787371eeaf3d5f13300ea90ce2f386e6099e7f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCABW1451361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7046646855544dd7b19c18ac81da10e5862cc2640315678d617915329ac021. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TCABW1451364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fd10400aba2491833cdb8a0dfb0621c5c02fcdffcb2c1a476a9cff0ae5eebf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCABW1451367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46854117b02a0cbcbdd34234b81cee24df708d9f48c18d2f3bfbe49d275d187. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCABW1451368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf5b41e1dc41fabf8e33b24407f41f3299197a1550b1fdfeef23dbe5bed36fc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCABW1451375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d6ed4a14f62e453cf6cd8e695e77f785b15718d5a5c1222b8bdf00f48b7b81. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USQY51707632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543692707e402133a4613f672ba8ec382815f296f6d6d065c8a04666f8e1c3d5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USQY51707388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c228be93550fc932d2345e111213344413c252924c3a3c4c0e802634902e1f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USQY51707633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa313bf4216f7b9fd89a9a9e68b41d212437011ceaecdd367cf635215d0d1f757. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR26V1541850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53c935a0065797a95354c8dac4a796a5e02ab2757a608a4744d34e0d7b1288b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USQY51707634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dcd4d09c89d7671dd38dc3fab35f305561d1ace093c4538d1cc0640a63c698. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCABB1190494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd4e9e6dc9f23e1d405732503a8ab0bb2c46647623cfceb6624f279b3e28248. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCABB1190495.
The Difference Between Living & Dreaming
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd36de42db248f9761f3aa92940c713c83b2ec7a8a2f6a64412af2dcb809ca4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCABB1190496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ea3ede62d4612f7ee2338af294808b77ae5c0e389b1e194ebee49c5a3d9e1a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAAZ1175809.