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 0x858e30dde2afbf6ab5dea4db1568314af87c9dda140263a51f49b70fdc23358c. 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/2ee0da50-6882-4e22-9a77-0a3e3378f814.json and https://artists.proofprofile.net/proofs/artist/2ee0da50-6882-4e22-9a77-0a3e3378f814.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 0xbff6afddabe44beec379398212a365df45d9fa88deb095b3e0354a97dc3b44b5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN32291445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7160f4766ac42ddb32ce490b3fea22f4fe2017f0c69bcf1ea38be1f90434f5f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWR2295578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60a8105d3946c6848ae3ec6d193f6662c09df5c63ee3cd73ea0e2d4e03252b0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZRP52239383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845cd31102a38beef4af65e1900efb2aa68db0d59b2606fa639066b47fbc3f1f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB62271185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a150f008efc9dabaab2276c2dbd6dda203ca7ae074f7b811006bfd84eb6b93f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHNC2388659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6b8ab74864681b5994cf03e26a656fa7beaee54472217c8f79c1e8f2fa7300. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNC2469522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccb1a4cd477b02baa0aa34bb56402016f4d494cb150b10c652d59649e74c764. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMER2419723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bea79f7afb3c05669af5fc805b0390365080fd05cf5efbf79168d9ea40ae94. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ8A2418578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57318233450e9129a15695ce69db3df09af0a5c40a2524dc2d4645d3a59b7d1f. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:04:08Z), 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/QZZ8A2418579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d4facc2b3a4d4edf0e10af7cd901483f1244f2f494fb8043d97558964c7c54. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZZ8A2418586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09e3a11cb90d635fcba391006389c67242d14551924bdff30758537358613d0. 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/QZZ8A2418587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b112c00a50651aed80f125c027e99673271ff4a018c23b5ec726ed616bcf5ca. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZZ8A2418589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824a571463b6163b4804a50965a49ae714c615d5e0559760fd52db0caa79d40c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ8A2418610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a0575127f89aaee09164359a9b829c7f7f20826ae723793cbf651b0f1edcfc. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZZEC2422066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd74f4a2f87f31707f9e7c90b55c5d73dab19c4f3b0ae0ea12931105a9389e26. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:14:54Z), 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/GBRKQ2567079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99218107a2a40c639abee00ac60659c2a2be247b142114dae6eef3628c44abb. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/GBRKQ2567091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e5880b04757fad3215195e0cfcb19fddd7f392f6755a2bb28ea1347b2f327c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GBRKQ2567099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e33728c1fe1a6b7e94902744142132fbb051c9cf3564fcb84169de4aec9281c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/GBRKQ2567100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40f270a1fe80523852ef2ad7396e4a90b18be4fac6ed85a0f18db3f6ccde7ef. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTV32513357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87782452d54d1bdec62edf164d93eb4c1a4f917d3851428849c8f4320dbd1e5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZRP52419875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7113596f07b7220a557102710c52758b963ebff284a130d839cb932d414d6a0a. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZHN32236580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24492aa9cf88b95d2870cd7f36d2afdd29759fa106b4039f4717dce0e6cb6e7a. 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/QZDA62393638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6935ec37b73728197d3a36004f9a699f15f845f24f99809b7230ba612af9c87a. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZNWX2252890.
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