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 0x40bf718604a7fb9dcdf9b39a74e1f35d1534d3376cc05075f9687237267ea76c. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac2e2695-e9ee-4cf0-9c78-d8082a4681d5.json and https://artists.proofprofile.net/proofs/artist/ac2e2695-e9ee-4cf0-9c78-d8082a4681d5.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 0xd5cc9f08d4bdab4eb123aa4d5b3202f55ce746ea567fa46bbb26046225650ddd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEN2438928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cf88528f8fb19d8af6a3fcb927e9c0423e007215447637c8df73218f41a49b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEP2496464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89ea8956af6701138aa6f184be4548e68abad45faef073327fe2e999657ede8. 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/QZMER2429753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa55618f618695b22ebdc9e0590bd9ff0d196eff968876581510252ea9bcd24. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZMEQ2459835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd7abd0646aa051fc4ae7df86412e948862979db3aa6afed133335774cb4425. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWR2499601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a053c16a31228aa0fd9d41f8108792ab684276c8a000d4a457ec7528e52565b. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZNWQ2457318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eaa5ec9da584fa21046dcf505185c4a6d1b5e5c2601a9248a1f218dd1c9f9e7. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZNWS2403142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce01a61fee9edefd6eaa0b3100a15a47d4f1651b56e47f8c742bfcc2d177a6c6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWR2415671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd83b0c1aadf96e7ebd0d168d8a71d273964f15e3120bb284733e23ca7229610. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:27:45Z), 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/QZNWR2446997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd18630c45f881ea59aa26e519d625b6164d40894744844e581d365cdda2154a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZMEQ2471501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47a24b4391707b89f9989136fcd57dd0aec99919cbc2e95230b8b689a0b239d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWQ2419425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd331d6f835b240d00d2ffeb5551d78736260cf5078e7a174264eb6171dccd481. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZMER2447924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c84552413a733b96132ec858055163d26293859a9a2a746fe7c6539bffc8b9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:45Z), 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/QZNWR2496333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95557bbc55190dab2c39d843a45bd2d9c291b325cc1d9fcd266a17fa168dd421. 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/QZMER2435171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a534964a37e755d6c8251be64f3654973c06da3fbd57a08e93478bc11dc23f. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZMER2455462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a7eafadfdea0e73ca4f76bebe6e90ab81d11b32804b391399d087e5f72b749. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMEP2469130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce54b0a377c4d217b162d220a1ac0aaa5fe45f4979676447ba945436016a23b5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJY2490561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf379eefd617efd4de511161cc8097d5a440025435211863de8de3d51380a64a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWR2479466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eba5937467b05a29987bb33a4edd9a5732afa0f68481455b94c7fe5e2bb7b6a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZMEQ2443079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4699f0cd4c310cdcadebb1be149b4cca91ab09553164d44d8343593022651eb9. 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/QZNWQ2452102.