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 0x210a68e98b47753684420566f1c8540191087ac274fc96144103d7a1f4fbddc1. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2dc7dbd7-57c6-439e-8c3c-e05ac87d92a7.json and https://artists.proofprofile.net/proofs/artist/2dc7dbd7-57c6-439e-8c3c-e05ac87d92a7.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 0xacb6b1985010e0406a8490e0f263ecde312299682de9692b8b64471d8b2b52dc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES5530901510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd611b7fed31a8468871093811544f9e8fe2cc0ce269dba544027c66591f6874. 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/ES5530901511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749946d4e0cc9a2d6c4c8e1e4356224f60111f1cd6afc3c18ee79d63846dd43d. 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/ES5530901512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2283db1a66b30cb165c1ae6374c16b6ce2010df7e09b807c1c6574047bd1d40c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES5530901515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eca3df016cbd51dbce5f0241bda3c8fbeb7c59f73b73f1b33cf03f713a85b7e. 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/ES5530901517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2109733cc0be084206b7295e425c61dd1602f7c55e0b37a50059ded52642ab. 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/ES5530901518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c305d8c1ac75384e078d018f3c953826e9f6a6938afd99fcd156049b1d6dabc. 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/ES5530901519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce18b652902727d0700c8ca37ed0a9c1e70a7c6d9768b04c0d906cb0ca34096. 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/ES5530901520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe0775dc68289a20fa16d35024def032a15fd00f0ff298ebec9333ed2affe4b. 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/ES5530901521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec39e1d3c925eabf269f49a645b3d8bef63eac946b8dbb939cc2cd79a2e411a3. 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/ES5530901522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7174d9f809197c7b2db0bb7e03cb96d82c30ff51b24547fc0505d82f94421db. 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/ES5530901523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e759ecf0816a9cf7913fa800de08822446c6ae5d0233d6a4bf8233aacae1a5. 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/ES5530901524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6644981deed0a9e7bf96650d58d6fb3d292cb904e7ecf5656171051b7b94e328. 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/ES5530901509.
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 0xf4f0c0df141621ececdbbee987d5c5bc987fd0dd3201a11e53908f0bf9d65cae. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ES5530901513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4ce7858352c92fd86ef148fe6c403411637e15ad8b918de846a9da434d72c6. 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/ES5530901514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763ba6b333b43f39e1c8e0364dab5d7c83dda56790978bb2814e82cb11f6e88a. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/ES5530901516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2834cc8934ea90c35d28b4ff2a0eab08e50da93c302d8aeb13b0b26bd3ea51. 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/ES5530901495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef9b532c3e5d10a1586f6259410bc17c23f9e67092e4d3bf8706d93319e1be6. 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/ES5530901497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f91bcc794c068691086cb0eaa5c09cb1ce26f70bce4a2b8297964a872628907. 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/ES5530901501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a97ed9f92a3f48836b28701fea996ecd5365f8be2407b4f2312b1c363c69d0c. 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/ES5530901504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9706c483b865ddde8e96a46db333e3f475803e217aa123fc8431f15255ac48. 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/ES5530901507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb571f582d7e0db091779c337e044a15a3a2199f2aa690c00cf4618ec849a8a50. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES5530901493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c756445670642b3402baab75a629e805783d08c833aacf00ce3ea8e1e0e88e6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ES5530901494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108cdfb8ca5aee42145cf6cfd16831063b8144ccb5ae92a2537c2dc629ce784d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES5530901496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff44fa2a078677046138e16e77b14468b3e252e91ea3117ead2e5fb827616cf2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES5530901498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c2934646f1b8bcbd869537757374bcce6cc691c089e4ae8963a2e3d159e171. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/ES5530901500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ef4052bbbfd18a07f9c7f1d319717b9db137ffebb98c3f777de1354aeb6e76. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ES5530901502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f148a95c735420c74c3f299cb3a15757eeb2b89ed7a332eff82a2d5b6b601cc. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/ES5530901503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541729233f9b649e96a4aab9a2b4e4e7901d97663c79db9583ef51ff0077ea9e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ES5530901508.