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 0xcaeefb46beceee9dfcf985dfa5024f0a204d0239c3ea3af1272437260ed0e2a4. 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/9bde4098-f9fd-4a9c-b4e8-412de4b1050c.json and https://artists.proofprofile.net/proofs/artist/9bde4098-f9fd-4a9c-b4e8-412de4b1050c.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 0x044db0a9d9d0be10d086a7bba921318a69eda972930ae29577f6506b8506dc08. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAHT2486188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa263d7c965dc2f0280836c6fcf34967b3d0696589fcd2bcb831da83e21b78214. 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/TCAHT2486189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaaec1fa2842d9663241e448c1bf7dd6fef79e6fe8a387a16787a801f8de68c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHT2486202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2435836c6837e8b9e165774786c09fb6cb1c4590db7b986b009d0a719b264022. 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/TCAHT2486209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176f25d8f6a0762720956e72464a9e294d867f585394eae731892e4c6bd908b5. 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/TCAHT2486215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6feb6095a0510f2d6793fef58d657d8d2419cf79d9f69bceca2d253b67415e4b. 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/TCAHT2486219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fad2a2a0e2702f169d8d210e08093ac6f1bbc9741e01ae518dc8f5f84c6bab0. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/TCAHT2486221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3e045eeb4722918461125f5c5be84a7a8c84b0947bb05b5ec72e8b933c80a0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAHT2486224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfe569563e4822e5ebe5a470e946a86b34f755b8a9da2e194a8ec190805f6d6. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/TCAHT2486226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52c6670793db42bcb2dd5e052c5d3a31d86a03d8d0e65e079a5c145b1c7685a. 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/TCAHT2486234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ca32e1ddd9c0184ec05f6aed2adff3760d1853ccb6ea758d63999e26f29e59. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/TCAHZ2475663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3004bcb222ff80eae45da11f97a24088c010c440450ba946e1dbb443ac4c09be. 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/TCAHZ2475682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c3c6e41a68954027785f7151c4089d2ffbd0a3048808efb36f5cdab07b3b81. 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/TCAHZ2475688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c4b918a31cf7803a79d6d68d927f41466adb2f80078aa611f354c5e332a7ad. 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/TCAHZ2475699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0177c970a1da968abae3ff6f71852b4badea606bd217a9c60a3de1c0a7b4e868. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAHZ2475710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a9ae507676eb8273864ea4511069bc2d98c5667a1f028aea885da2b1458a09. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAHZ2475714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8aac163476b5527f99f6ab76d6b16d52d6034b4f89afef2842b5441ab921a6. 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/TCAHZ2475726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9cea30f99aa96455fd7088644b7346ddc7ca19c605046807667672fbddce9f. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/TCAHZ2475730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1531d6c891abaf8592979cd884918681d1d2b0f4912897ecb4c8f5f461a2048a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAHZ2475737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0908ab8d40dc5c9b51d9ede499170a20323435988ec1c50450755c4f0537c360. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/NL9KQ2442292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4477fc975aac01369775f5251c77709fb3d683e9dc063cb81c23f16a74007fee. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/NL9KQ2442293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f339a974e029ee7b14952ef06ddd08508be7e90eb02f661a1174eaa351daf96. 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/NL9KQ2442296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dd61f5656aa736a6c1904844f5591781176fa5d7dd58084d56ad2a99ab6f08. 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/NL9KQ2442297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42c2308e529e0518883080b14f300249f70afd94a2d43986cbfe1d9132cc90c. 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/NL9KQ2442298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8d8dee7eaf2b608340d1f2f5f09b2e9ee692da3faa4df6b6d749265c732da2. 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/NL9KQ2442299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53f827a6fa52369b7086fcf34a97f1a71e67fe97cd1138b5f9f10d4a0f779ff. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/NL9KQ2442300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09e446a843cf7a0279b0cd12bc22bc07c94b74f19594e18de0908fc32d493fa. 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/NL9KQ2442302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5962cb2ac91d1205d95b75c62708588c39f8e986224afee8731c251750e479d. 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/NL9KQ2442303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892373810d78030fafd5aaa3e3f108b96b8f74b560579613b57c4704c617985e. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/NL9KQ2442305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbd7f3b55159eb1a343b2a06e2adf2c28455ac9e544f379d0a75677318282c5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NL9KQ2443778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c9062496649bdb80def00dd799e9a21b5324e2958251b210a3b26df29aed52. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/NL9KQ2443772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade05eb92c9b1c0010f06361bb24e5ace7ffa5bbabb17c7cfa69dea941c5f1ae. 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/NL9KQ2443777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b409aeb26f919f2cb54e8249c0ac7904b1d6b41fbe9f4a7df02df9f2542307b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NL9KQ2443779.