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 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 0xc5dc0d190c5836f4e4569975f7003c1b6c8974fe17be51afac8a1e5cd77a9352. 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/6a137dee-37c7-47dd-82d5-556206229369.json and https://artists.proofprofile.net/proofs/artist/6a137dee-37c7-47dd-82d5-556206229369.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 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 0x720d7fc9fde8e2a30c46be5f33dcd59f4fd44b1bde03e4c06a807719c6a3ced9. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:48Z), 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/ES71G2100517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f69ee6d7f07259de7a6a44d95a43ca306fc7ef00770028e4797b16dddedd17. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES71G2100530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c85af453a992cbf85689d8e795d85110c046993410f2a540116ef6d41f12fed. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ES71G2100528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03b959d055e6807cef69df23f34e4af30d54e9e1e0c4d48654a1e191dfc7319. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/ES71G2100527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6125489a79f6899d967eec35e64e1420a4dfe3d3c82b5aef4db9c304242ac8. 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/ES71G2100519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79a2f883e53fe5251981dd43a3179b44376dfc954adbbd06ce993e6e82d1a79. 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/ES71G2100521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb713b4f3e8c471d0fd95984668fa3c552ac1c0223158ffd2c820e85d482c485. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/ES71G2100526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98d46bc093fa0c7ae27a36311f4fde8157d9e7174df8bc8156e817e4cb628e7. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES71G2141022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cade05f68cfc0f215af652d4d3833f9a8e596cf767e141173c4f04d9208fde. 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/ES71G2141030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc57c170b86edde949439a88121262e62282c576020ca9b27468eb4f9c27906. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:57:20Z), 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/ES71G2248615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d1f0ff6f39c81bed79ab237c6448f277ade95991b82b12787705f76feac558. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:39:27Z), 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/QM6N22559668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62352138adb616c3a8a74c87f4252c723d54c14fd7982c04f875b4d3cf0d2728. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:22:51Z), 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/QM6N22559669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e0f7e3cc773883086314103fb93360cdb360133faff3672ee051b5215427da. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:37Z), 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/QM6N22559671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3454f256fe45539310da2c831690e53d37af06dd1be27512e24ba5e192ee819. 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/QMDA72566704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bda260ae72e70d3e06ccd91f3533bfe749bdfe4f3125883cef514800863aa00. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QMDA72566706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaef8699492c8c84871714dea72a0dae59d4e00a54ddd497f0cafe524f2581e3. 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/QMDA72566707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164a6d38959110704abd078a11e024b47f8014b564158320dbf83aa87700dc0b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AR5UH2300975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d63f300c9fa64493a12f9862874d154a39a25d11127cd39f384e55098fb5bf. 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/ES71G2415250.