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 0x735ef9566730efbe41bf10cb76a6d92a567866410ed630e48007ece2da958929. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a0eb7c1-a349-45d9-8f72-2e4af5b4613b.json and https://artists.proofprofile.net/proofs/artist/4a0eb7c1-a349-45d9-8f72-2e4af5b4613b.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 0xaf9fbae780fa6866a8a6be69ff7a512fc68029e7241393b3570321e3c9827202. 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/TCJPS2239982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05b299b6224d053e0f1b5a55484baecce02121438bea95847f5693a15d7509a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCJPT2203692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3727d2c71f8490c418850fe251f22d1a74414372b16cbf063a440eeaf1038ba6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCJPT2203619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03387bb6558e7b280efd682ee8d52873c056cfeaba0c57b28d94d551a1f6ca4e. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:54:11Z), 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/TCJPT2203824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289cddeff3236b52fb65f59389ebdee45f4bc749ad83c8f92d7703cdd211f9a0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPT2228584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1723ba2a8613af1865a9ea86005f5a2c5abebba269f50d2c5d81dde7a1516e76. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPT2240130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4268af40d74b89e45c69409a274f02b8ddaafface5a6c1635e2b6d521061dc6a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:11:43Z), 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/TCJPU2218504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ddb6f9a6fb14083c472cdfd68ed5784a4f91eb011f34136c7deec7e46bd188. 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/TCJPU2218500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b62a97b9fb39072d048bee0e809e6d51a5a305dffef7c1cf7d7e3ec99fb5927. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCJPU2349599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cdb07675889ab72405d719366a2f5ec772a42854f2af063a9da1da2517d096. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPV2322137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002512c8cc5f9d81e0e86b6fadaa3d64dfd6005424cf99fb3f0d8fb3195c567c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCJPV2363017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54a45bd970da34deccd2ad79f8419dbd4fb45b8d5c22faba1a8b91d9aa466f3. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TCJPW2336137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283c886dc5d6f6e057b261c378b450332c5db86a7aa8e883fd93d0b8bc918eab. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/TCJPX2336201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748a701714eccdddd779680424197bb8aa637ac44e093caa702e994540fdb1d8. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCJPX2341182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed1ab463b205ebb34e847c9665d8f2480af24069d9129bafce8a9704eeb4c72. 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/TCJPX2392485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf655acc45ec0d4bb8995e34acb616f91206678c5c0578a9f8c3b95ec1f8acf83. 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/TCJPY2323762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ddcde5c6ffbe67fc82f2db3a0e423cd3463b9a54f07ba7399256da2fb2e434. 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/TCJPY2345232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4e28f2652ca4c1127f325211a3c61011902a547c75307cba7cc7093a7708a9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPY2365081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14350c1d8de739e80145add55007438fdf4d9736ddedd23fb857ee915f0d494f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCJPZ2490125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c27d3697779b05d4bea96275a790504c016d1bb9d4d6a0ec45e9116417e13d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPA2472799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570e3f813127415e06b5018032a3ddeff5addc70d60d68e2f67d1e3b7626b6ed. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:29:04Z), 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/TCJPB2406723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631701907ad650b1cafbcbab15f4ecd5661e638cf81f9a0142f1a1f1d8d2510b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPC2440834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d09ed000a19277648e1f650628337d3289a21eb06034d6d6f2add15212fd946. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:49:38Z), 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/TCJPG2545379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26833221699e1bcff330c9a83bc36502b1bbbc37c892608ca1fd9f05119f1896. 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/QT66J2582935.