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 0xc8d27e3c8fa2518d59c33409ad63b856b92330fb3914f95a366380c66082d57e. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2eeacb00-53aa-4e41-bbfd-3e5656354bae.json and https://artists.proofprofile.net/proofs/artist/2eeacb00-53aa-4e41-bbfd-3e5656354bae.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 0x2729c53824fe265648225e6c2bc95665daed16db7a6fadac5acbc09b5a5361fd. 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/JPR561500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990a309d4f56dca7975b3b5bc118fe3bcbb2a882b12f8e9ed9de5215ed1e948e. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/JPR561500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8cc2ce754d99d05dbfe059474e98d0534689bbe9444ef428c5ebae50fe0361. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPR561500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e6ddd3e18546b75881eabac97f7924f7297605322c728772c424fdffa8f7a1. 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/JPR561500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72de4f82e1c3843718751aedf0b2acbb067368958283b67d185fa9476118fa9b. 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/JPR561500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d8b7f1730eeff60c827514e6ce33f48bd295b6d33a2bfd787ef0d49f0d54b8. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/JPR561500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8c24a232808c104ce96f66c055dbc6a98267cb910a451145eff33321354372. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPR561500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f72cd7eb636116c60e51d60d14992c5c500e48821460482a573042f7f57e98. 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/JPR561500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb9a7092079357ae20d3cbcd5cc8d73a359b46bcb650b932849f30ae4d0bc82. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/JPR561500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a80c30f6bd5d36ba4debb453e462322c628c908abb2e459230cf769de36aa6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPR561500097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7174b640e86f43b68301fa937e617315dbaf300d0911b0c5946d8cdc617605. 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/JPR561500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44d5264a4ba04d36bbf20a02060bd3081af5672eee8689f32b91407f59c53a5. 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/JPR561500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4712ec2b3d8b6ce69f142f7bab2a7f46f2e40f8e457fab13c526781e7bac8c7e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/JPR561500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110915d450f977b413f979d57bbfeffa7b24db63e82f2de83c1bf491b30807d1. 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/JPR561500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9e7905bbfc770ca39344f4c4f5de1ab2aa191ca03fb84d8bd2ab114e753474. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPR561500102.