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 0x2bd44ac6883b02e39d5b4152ee96666e3b2135086e04f3b1e5c369968c026d21. 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/7a23540a-85e0-46f9-a038-e8e995c98bcb.json and https://artists.proofprofile.net/proofs/artist/7a23540a-85e0-46f9-a038-e8e995c98bcb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Everybody Wants to Rule the World (Vocal Edit)
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 0xd1a6507d2162fe052a7f317a2eae1c4d0bc5dbeb976c2600d81be8bf51aa5069. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US43C1627692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba5cd8d49cdc25274d81a388431c01f2b41f2722c687655640694e5ded3abb9. 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/US43C1627029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85eacbd49c6f080df301db63341c0e2b21825eaf46318c428f3a32bf561f7bb. 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/US43C1619571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f30f97dc269d52be16f46517afb00785150e8aea826326adcac4112d65ac707. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US43C1619565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8ac456d5dbcd84ab20e29fee0f6911478a9e5037f2eaf0b1cd244aeb69de5e. 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/US43C1619574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7351d985a52dfa52adca4a3009c143a89a6fb2d37fc983d8e500443b033422c9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US43C1619568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6086072b50792046e2ae287fcabe576175646b95b3075d1e299dbd528580141d. 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/US43C1619562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5327e0fad588d61143f9d1084489e2ce891eea0906440fe43633fd6a75c09b9d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US43C1608069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6b4145f8170501bc8d8cf26b34b1927658a9a5855c2d350eb3304aed362856. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US43C1608063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498e6518d9e92c5a57b3f9a2bdcf2f7e5c7b756402ed62489f910b2aface8c7e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US43C1608072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc52e3d77cf0abe4a9fd99e67c4de4ce9e58e5ae448364e97b6e30c9bdd0b11. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US43C1608066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ad3c2008eb870086403939d89ab7f49baed13a4616cc3df82fade9af3c2e2a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US43C1608075.