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 0x0707d1de984c94ab44ff3d0fab91947ab5999856ad9d5aa141563d16926a2322. 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/7ba8f71d-559d-4559-8b2e-b64f1f6d1d67.json and https://artists.proofprofile.net/proofs/artist/7ba8f71d-559d-4559-8b2e-b64f1f6d1d67.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 0x0d43be7ed93514a9a9f1688599a95f091b9c982ed8e9db50f5ec1f250fcea578. 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/BXLXE2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0c9b48b423864d2b5afebee14b272d07ad0cefee09d7d4bca814cf97a3c6ff. 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/BXLXE2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb511beb6c1e925e2c4258bf34ff8347a37886d5766f57b83a385d9bb6e3a313b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BXLXE2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad3e23d8752ac72a79374b0a20b9240ebcf3e70303cca815ef8555074a4cd6f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/BXLXE2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657281a4b587be31c75547f719b183fbc9667e84e626ffc3ad39007bf221f939. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/BXLXE2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d530241a4f22fdf4749c9e3466d1250eaa6b9fd4b8093b7afca42acce895366. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:53:27Z), 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/BXLXE2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf897caeb5dc16b2fc10fd9c6149bc6bf0b365278f8382a6f23c27ecd800a5efa. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/BXLXE2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a22f037831363c7fd6a3f2505bd7f5266f3c6136d236115b1d0a65d8319760. 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/BXLXE2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb141d0c290495211cbceb3bad080bbe7eed0b66e9df06611c121d4beb53579ef. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BXLXE2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ec57de834c8a7be9588e8b904d6bbb1c214a716fa2005b36665380937902c5. 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/BCAA42200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d0f4cf999fb707f4ed57c0a0e927a81ba9743d789899c64b54bc9e8023728e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BCAA42200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ea599c67317b19d56cf3e5b36606c7f6769d0a27a06a33fe479fe2e9d8e112. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:18:10Z), 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/BCAA42200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dfeeecfedc239b2acab9d7200ffd064463f8126ef8e04a41d723e501c88ab2. 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/BCAA42200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d65b3c988965d7c3d9d9951669084ed323ee33814ed93b08d8db3ea4a055a4. 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/BCAA42200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17cb8484c3b565aa5b506fa68f4c2be231166703293803df4b1eacf5c13aae0. 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/BCAA42200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8342da4580026b319f3fb45b10ec818ce49908bc510435e89408a3002c7e5446. 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/BRS601800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7070fd3db8c60421ea23a8cceb26753b467b3521e01118b4dc3bfaa8aa3db2. 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/BRS601800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd33dfa06a9a6b9107c46f9413a570591c0cad5f3d88c7f72201c8ac0fc58566. 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/BRS601800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b739cb5d0eba25e7dffa0a3d30bd207073fddb54e7209ece759006df6933d9c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BRS601800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fef0b4dfaffb886544f3f3f6222c905be92df3caabcdbd0ca71de5cb403ad6f. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/BRS601800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89022252e9241cd65298befd4f70a62c7eff700cebb2c1806969218d7906c62. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BXLXE2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c23e9ed856d351bea3857f528e12d8a496b6b10663a69ff78c631ff52ae1978. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BXLXE2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd87b3eaf2477d0b6578c90b20cc2f38bd59ffbc2f00841c4f270dd1c4808b78. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BXLXE2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0de2f3635acb1d70ace34c2c218e0b0cc08dff752d35772b4030e1dc40fc7eb. 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/BXLXE2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a73d31680cf94d52d36fa6d275a920d06468d0a1b29a2df9a87cab2c6302d4. 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/BXLXE2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8d121404d94b5ba970b253ce8e47972bccd869bb1258babd37e0602173f8c3. 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/BCAA42100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccaaf03d17cf7bdb7fe643b0c9d3fd002f607557b384f82d56f97444177591e. 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/BCAA42100002.