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 0x99c3c994532d2a7b02ac9fce1efdca3f02b71db2d08bbf69581d3f15d7db8647. 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/9e9bf266-ab8f-49b4-aed3-112769ebbca1.json and https://artists.proofprofile.net/proofs/artist/9e9bf266-ab8f-49b4-aed3-112769ebbca1.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 0x2b27b6cf5797248f39ff49dcc362b0e5bfedb62d7f4c72f83fffb360fca6d519. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:31:21Z), 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/QZNN22138256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2c162a7b541b9fc3cd7d115d9d9926b04b61de3f89e608ac8dbd5f0ff45f9c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZJG52118430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7219eceebaa684dfeff52d0ac7e31f1c8283a5dfcbda9698470d694745c3618b. 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/QZWFX2478942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd207294349358ddc8cce5b68e7e0ce731f24b17937223044a4c9c09d75d5494f. 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/QZNB82242461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b49108bdc46b979f644612898a51ae46557e1f456e24d1f18f7c193d54c20fa. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZNMX2250737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8defabefb2e9918e958ff492a2d13c4488292979a90418302856641eb19d07b2. 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/QZNMZ2220739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a495e842019c7f1332673e9ccf93192324670d3c5bd2c688deafba44f3f12a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:15:52Z), 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/QZJG52383550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936b081fbf20d0660c7add2ee946d1a3d96b9e1ffce7d6db64e0625e08380491. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:04:27Z), 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/QZLL92337895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c6da17f66cc2fb6f88239baae74df793faeafc6f521dd40f1748e5c28dc8c8. 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/QZMWW2303372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f90d9914dda81acab7c3830ee39ed2fffa561d66d5251b0e41215fd2e0c2591. 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/QZNMZ2302091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d4250264ef98ae3996870f3ed1c0bced0cbbfaa9183b3bfc253ad03d25a64d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:01:09Z), 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/QZNN22312969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9fc2b8c1e262ea43a38fcc0727bf30e4d0598b24b6e6c87b9060e73d23a186. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNN32319164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9d1d979aa3eed9a98d6a14d1463f6f23336358ee5c0f5d87d9a55398f47432. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZLL92498741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7180dae0082e5365806c7ba60656ba0632ab0ce9585563a8177617d449e7e87. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNB82470694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2b895df3581cb4e4709b9c502f7f3566a5d34755db541e9ab9daf9dca1a8ec. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:02:38Z), 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/QZJG52521603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccca4299d8ff3df639d261b4615ea77797c7ad048c116d4144d75d4ae7a6829f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:11:56Z), 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/QZLL92527606.