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 0x89126d14ffcc259a438af8c271275832a5ff69229f5861c6f7e468b9a4022e1a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1869191-65f0-4cf0-a0b3-18c666baa007.json and https://artists.proofprofile.net/proofs/artist/b1869191-65f0-4cf0-a0b3-18c666baa007.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 0xbb35613c08a48fb5ef26e31e78258bc49ebe4578a64e3bbb998d879070be2240. 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/CA8QE2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17167dd0e8d29db7e0198c73e914c7f1db4fbb745d66d2ab74c65ed9fca8c1ba. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA8QE2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d30e32602b3573e7a78a48b3b2fac755f1a428dd2f2ccf872f01f4398f3dea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA8QE2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce97810f2a41a90cd01e4c040d30b6f75b35d71cd60cef4d956e3a25334bcd71. 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/CA8QE2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ea668f609a90c1c5f1d7a113055b44e206da2e9081d2af69e32988a8ceb9f2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA8QE2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806bd02f1641136db123c456d04e8a0f5ed0ade7cdafe5747ae843ea93e8af2b. 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/CA8QE2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026c5c9dbda7b68215acbb6e6614c25dc93db8b39760be35e602fb0a7bbac14b. 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/CA8QE2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8607a2266f4586d3aed50f0a5e1b94b61a3ec7c48f1aa6b1bf1f8dedebb4a019. 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/CA8QE2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035c711ec60fb85d561c4e5cc21ee584eca1b2d208015d190864ea150c035049. 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/CA8QE2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0947571834fa816c06900bbaffff3f16454d94095b4196a93b00ce154ce9a1. 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/CA8QE2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d8ee7cf5d7efe3dfd41dea4441c6fd0623f3567c620c4f34fe04829a85e8a6. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/CA8QE2400010.
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 0x211cc9f79d43a0e0f9f03d28717b393f05d77641f2cd2a78160ad226842076b2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CA8QE2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3677143b9cc30aa2faac8a5e18a3636b97d6422a64ab58e0930fd89fa4f6c7f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CA8QE2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a71f3da31291687f72e6299b1f5fa3e66415e7ed5edc4674755eae12c3ef1e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CA8QE2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1398b6c1dd7cb26e17d7328cb67bd331a658f7992b8ada5eb969f5b8acf1e732. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CA8QE2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1697430bb4ed253a0d1008bb0610f79c8fcee9077bbffc5ca45ee3d1cfda2b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/CA8QE2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fab8f1b34e1b2cee7f88c434242e1a846aeddc6de9d73b76e6e8fc6f505eca. 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/CA8QE2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d692fbfc67f222d001f03975249b47471bdd4c693aa84b30b9896137aa56bd. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/CA8QE2400028.