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 0x34b40a91ed5cb3b3f3cef14d742e7033be7c27a7df6bc1aa305d80897829904c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d9ecf9a-c11c-472d-8fa0-8a78bd1cf8b6.json and https://artists.proofprofile.net/proofs/artist/0d9ecf9a-c11c-472d-8fa0-8a78bd1cf8b6.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 0xb357a94f711e07f7ee53e187933e73e1752d47858789021422fee55cfa15d478. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAGF2291809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb233ab26853aff3217037020f996f9219fcac1d5162a37ddca98a75b2dc195b1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAGF2291817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785bdbc64e4c427279d77b57dd770a2bfffa9c4aa9d0a27cb1d7ca3ac7bd81ef. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCAGF2291819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9bc9d20372597bfa730dc527f6e30d26bf010ee5e59a4b234273470c4982dc. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAGF2291823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ce6a3a8b2c3ed417e9ea60a243d6a6e6bc7e18955e1eca21dd10108afb6d77. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAGF2291827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362c4ccbbc8d2d697a1b22159248920597e51ea1264ad825f6c5828f51ac9eac. 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/TCAGF2291831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d997e28fa1ead70ea90db78882e03899e1828c62014b83a69683ae6349c973. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/TCAGF2291832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe76fe428e2fab2c7b89fd715ade71d31e0409b83d896503d537edd5791efee. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGF2291836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fd5d9a73d7627b03cb8c2bd2156d066e46d11e44ba1701ab1f2cbb8fb86818. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAIU2415647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3140444740b6b89d54e322103d321f900b0edc6da39bbc719d7a18fa12a4eedb. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAIV2415659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d995dbf5c05c02aa9995ea4127fcb1f4b53cc1300c986ec039b91cca1d5d358. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAIU2415680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325165c2a736a411316470795e6c45f8f5dcc44bdff5b33d2ce7c9b4695193dd. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCAIV2415752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e6cf836a63dd484231764f3db5d988b2a444afb42f1f38f013ba06eaa88a25. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAIU2415759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a12de62679f69b1d459dee2dddcfaa39d937bfce158790b064213f8437bb766. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAIV2415817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bfc7607950215f55c78505a7475c43a254d127b2270d8e41a735bcb638ce97. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAIU2416279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9b733878adf287e6d1a982364be59f1ade5c3c45a76b2a6100827caeae90cd. 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/TCAIU2416289.