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 0xf8a3479e17058f0ccf499dc38592d28b02b3dd208229fa70168bb146775cdc51. 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/9d3c49ea-5eeb-4ced-a3ab-64aa5e9b68f1.json and https://artists.proofprofile.net/proofs/artist/9d3c49ea-5eeb-4ced-a3ab-64aa5e9b68f1.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 0xf08d6e6d483219c576fee635735bd62817114d73dc789fd87a85870b2d6c30d1. 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/QZNJY2142180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1a9339500a9073f6d670f53f6f44b86bcca762b00bb43e17b06e9aada67622. 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/QZNJY2142181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815fd7d58264e90b7ca614a072756b080ed83667a7356923e33e3605265fa75f. 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/QZNJY2142182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a1d09f7993cd39b22cb1d036999b8c655f7bbd5ac95c6bc9c38a58108ff947. 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/QZNJY2142185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf55d4d643158f7c879ca9de2b2ba17aae11d874da96fa218c9f191a8655c46. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNJY2142184.
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 0x29f396bda5c1c6bfa183b57586127160748fca17b6a7af4f274bb219a8b74919. 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/US7VG1956344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d1cce3c664ee26a38fd6acc00811beb3cd8f0f609cd449762e524e2017eedc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US7VG1956345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c748f172ad33c5c6f010c838da7ece19c067b6bc3a8ebd0aa5de55191a6410. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US7VG1956346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae876806ad15eef1ab5e2d3a04eff1c0f6a55832083ada139924be67a762121. 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/US7VG1956348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fbfe4e3efc2838512cfa6f72f05b972c25f6b0cc7a8ec1b8f5c6af880f27cc. 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/US7VG1956350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73de46acc5e1d3eb9e162431b1b2c08ea99765fb1e7493be8b9e3048abbf23d5. 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/US7VG1956352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687c853c0a7deea5a26f5ce9b1e3fd19ea7004c8ea368d6b4f4949df399f3f4e. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/US7VG1956349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef8a98ea5643e06bcd6e39c3477fde4667de93aa100f974bd0abc7600996d26. 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/US7VG1956351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0a571f9eeac851639e87712db08bfcdfce38bc02cf52313f5b30d0e5643d4b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1936649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b34bb1302b1ca785c4dcdddfcd0d44ae58055d33c26c64b665b2241eb9a22c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1936650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e84761c175a085ed37301c4623db5f45373421ea0fc38f72e8d5f02e51f8089. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US7VG1936651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcedb217427ce05672e6a4fbd93f552661e919c9c48ddf3652bdb13be1903f0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:11:54Z), 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/US7VG1936652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e720ebc9821b992861c537717b2d75fb4a1673ff2d69df1c6a799224c4cf264. 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/US7VG1936655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2137ce46a31060dce9a9dc7f8a1baa2e2e31859d8d92717e3c2aa7471a4f4f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US7VG1936659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9390390fc2ec5e129a61732f60e2634010bf95a74872fbd8d3447c859e3147b2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/US7VG1936661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba3ef66abd03dc77c335bcb56f69e38e5238ac99b735af6a7509909c68b4f08. 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/US7VG1936663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12992426b6ab6e0f9cfa7ce88b470df158670ad66011d9ea1ae6328aefe4dc25. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US7VG1936653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18054246930fdf338ebff2ad240d3edfe8637f91a3238edae51193e580d0880. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/US7VG1936654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7eca59c41eb7b3a775f166582e5a638984ea6055ed80733f0737caf9815306. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US7VG1936656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cf92b3cbaf675237c1f8dd5ad547a770ef2b524bc16623113797b89e65c7bc. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US7VG1936657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975cb296820ad415ceb0da3707985a0d8725add5baa096d187a49fb07ff74210. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US7VG1936658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9416e58df99dff0a8070c0689165925333eb08fb7aab6dc01f3d8449367a6624. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/US7VG1936660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ecf61c0fbca6a97ac15c1d79a3a17643d6071d4c94b8a9034486808c6c7700. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/US7VG1936662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafff7298a18a1f74ec21dde471933212d89bcd22dd6db2e79664f77e5bf2a211. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRRO32000010.