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 0xd316a05276abaab49eac315ba465f46447a00dbe811dc2260be10cc41d56bcc2. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00434d4f-35c8-4d87-a243-5ce5d265346a.json and https://artists.proofprofile.net/proofs/artist/00434d4f-35c8-4d87-a243-5ce5d265346a.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 0xec621a19b1adfed1eb4c6424cdcf3e754d770b6a12dd950268e1040f6e6c4408. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GBDLP0900539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e351a0df131543f69952d2293545c4d3881cd30915999a1eb70e35ab8c8aac. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBDLP1000680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b93c7065ba4af7bd928fdc5bc21912d758425bee73c77b52915323cd9189d78. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBBXG1120061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7463f4c4caf3df7b268dcaf117950e8433e7c7550705c91c7c15355902c9c3ef. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBDLP1100751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ab7dfb43078638f33ae9fa108d753e227b6433ee6b5ce9e140524c2ec199a2. 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/GBBXG1300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3dad14cd0379b3b8d044aa21e0ff74860ff4c9102f03de0005dfdc8ace788d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBBXG1300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98827117d1737c1cd366e6c68f1ee88780f096542906b3274bd0d0255754c84d. 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/GBBXG1300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a19905df3c867dc8a6efd89c4e89befab596dfd0e6a63867e390d2b5749831. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBBXG1300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c38a2a7da13822ffa4bc7a77756c8e7c45bf9e724112838ee6bd04edea83fb2. 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/GBBXG1300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c8939aac97e176f99196288a6d8b8a3a83e016af9bd133c2bb5246e091459b. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBBXG1300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02f5273e8a553f7aa0c77ff5cbc9e75c65fdaa0519734912195e55c67475eed. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBBXG1300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1a56e43ec370c58509875a1d7293ceb5ad1ea4b0aff0c5264e9ef62b4f5c8e. 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/UKACT2130712.
Out Of Sight (Special Edit By Jerome Sydenham)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67334724f47fd5b387e0a6552caadc19f59102224e036b402fde91bac5f7b353. 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/GBKQU2297941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0228994f019715412ca156847b9170d0460f12ac7759c5402b284c7bb6f8f135. 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/GBKQU2297942.