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 0x8b5920e0bb7f40fd7fdbcee6b5bd02804f5ccb1a060600dc368629ff9f505d86. 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/93a41797-7e45-431d-a265-57f92a262a62.json and https://artists.proofprofile.net/proofs/artist/93a41797-7e45-431d-a265-57f92a262a62.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 0xa1d21e6a7c7e96ea79d1a72a5edb8488484ba380a46497754ae1e297b8ae74ae. 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/QZMEQ2278112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599e2d3a52efc42e7aa025da1b506c90d33cd5356fd9e4589353f72109dcf663. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWR2224623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc326c347a1eea02d57fb922aa4c99d498e685cadeb27af3cc15b7a2fa74a993. 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/QZNWR2293348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe816b57eaab65dd8763bfaf945b43219afe15254e330b13bfb125a62eaac37e1. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:20:40Z), 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/QZNWS2265927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45563779cf6db792553deeb068dfedf8136c583c5d79bf2bd9cc7b185b0b129. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZNWT2223297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f5d6a32a25a7fff87d5ff697bdd31cc6646babe1fc0872513d5ccb54303227. 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/QZNWW2249311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3956c81ce9cdd6f8178b1ed319a7af80f8912937df4bd87e699a8e5482167fc3. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN42394170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6e5f0d24f35630a70dda07b394d665e2a1c81c79b8e4a94c9a5ae53d542750. 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/QZNWU2375356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a50f2b9a13dc0e6afb7a44d58c36550f2532f3f66ea26ec76ff3d97636cab8a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:28Z), 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/QZNWZ2364216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699e681e723e10f6e5352d71aea0504a5738e1064051ed56f00c88e689938ecd. 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/QZTB42377695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaebb2977ce8678443bebabd6e34d1bf26a2d33d8f8aa9940e42b24b92fd1b47. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZK6F2489325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630c0b240c68dc9f1caa014882b8b566bca733f195e5f8d078e6c852e16183b2. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:46:10Z), 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/QZNWV2499385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf0aebf6c11651e9c6d184477739128b3d481a3dcc93dcc5a23527e43e8beb7. 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/QZWFU2424642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd86f1370411b545b554428a4236b4fdfaca2953847f9fc7f3a617a6d61450b. 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/QZZ7U2599916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28c00aa54185c41eb11b328717129bfe58d608e8e6cbbaa53f277da05517894. 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/QT3FG2512087.