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 0x1b34cd80cd5bb283d1097425dcc28fa7ab1cdebcbb9e2f018239116b6d340478. 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/4c2ac0ef-3f5b-42a0-84ff-278c641ce8f8.json and https://artists.proofprofile.net/proofs/artist/4c2ac0ef-3f5b-42a0-84ff-278c641ce8f8.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 0x833ffbdca6a51ae6f3c595686bd7ba7f80abc52e18b2aeaa8ce08c5fb243bedb. 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/QZNJZ2286687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a11447f28374a625ea7ff6dc9ad13b59c58650a418c7fcaba8a5156609e396. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:37:19Z), 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/US7VG2374833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c32be38a0a54f12fd406e1418d14024fca08b0578a52d7958e8ea5c50dfc063. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US7VG2374834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad69d9af8d0c45799fbc43a213ed664029ec944dcbcabaa5dfd9392e8854602. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:21Z), 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/US7VG2374835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89c11c33da3853765b657342c8ed4c2af8f815d8f26dba2ce4a1ee3139fdca8. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZNJW2345939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6848ddb3b947d419519e128c222464acae2c289c32c530dd8a264fc34620d7fe. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:16Z), 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/QZNJX2345469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3f37f96960dedcc5963a6e72346b1c880fe8a96e141ea05b346e7091521fd2. 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/RUA1D2458595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb28462e973be923bb8b528b7c3ff4baaa87dedb4dc4ad39352a6b57d7c55580. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/RUA1D2458596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d85adec675f470523e7208bb1499fa933cb3ce820783f901f9729054f2f18f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/RUA1D2458598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bdff95328796b8ca5fe6ba9f464e523e508c658134991e03f06a21d9dc7bf6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/RUA1D2458600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb036c0c05ee6fd0d478608ef92899588f0665aa38041e7083c6f226f374ff3. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/RUA1D2458601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3348f63371fa3ae9c86a063207ed001c8b64563ffbcd7a503609013d0c8c5ac6. 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/RUA1D2458602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7530026e2be704cc182a275d80659aeabf85e9aa0b03081c7d51889a1031ad. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/RUA1D2458604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af31363d6744268287dcd51570b7d3086fa5a8fcbcb92d9453d507419fcde60. 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/RUA1D2458605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61456bffe885dd1dfafc61853db148475f4f6bcc3babff886cbf3e2b174b318. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/RUAGW2504864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a511f47c09db236582fc38a4c5084587ef475a549aad8322c3373272b3a7f0b. 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/RUAGW2504865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7291fdd8e8805c8cd39ff2390e435640aaf3b3d8c36a6a27fd9c7c8835b3a60c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/RUAGW2504866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fdf31e81bbf749ada361c96dfe592e1ac4f3b9a59f2d62ff4a8f4668509749. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/RUAGW2504867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca8325d92301d68eb18add0f91742155cccbac1afb828644be8324f6d651c53. 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/RUAGW2504868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abddbf68fd008894c8189b3fa2665bd9e1b8ac87283c1a26a528974155aeffb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/RUAGW2504869.