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 0x66b06bf722608a9f3011bd4b08a5e014d539f97a12a123fcbf8b8dea3969bf46. 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/c1f2fa04-714e-40c4-9f78-eb7f4de55d52.json and https://artists.proofprofile.net/proofs/artist/c1f2fa04-714e-40c4-9f78-eb7f4de55d52.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 0x46b7b75d0ee04e28987c2d07d816bdf464dfb9bb4474c3e88110768b263aafbd. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6Q2201505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896b3ec7f9abab1b7b9c7f642f16bf877dfc99451698f9f732cb56cc9980da39. 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/QZK6N2295040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebb16e7115d2fa6800aa8edda4f70d6e424973e989ea70655ccb64cc87fbf8c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMEP2257825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f729f913b70ed129ad3ae899888511edb400de9509dc41ff020182afb26de12. 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/QZNWS2291444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c08162dd2a467f21d10d2ddaf56924a469cb4eaec29de062e05a4ad95c6492. 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/QZTAW2250319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e847b49614e4f828076cefe55a3ee2a95e743a55233b10ea7b755570516c1a. 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/QZTAX2213817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f523abe397512ced72fc983549b5ea1755fec95def0ac966f39f0429fbb5f87. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ32346271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6f405c9fce203e907d7efc1f0d0bc501e3e08145c33b7f472c996d02c58ad6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN32394209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1597839b396dfa45391f43a93629963133e546d259058b2c38267cbf433b384. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:56:32Z), 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/UKZGC2303176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1597839b396dfa45391f43a93629963133e546d259058b2c38267cbf433b384. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/UKZGC2303176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09854ef7844f2fd4282b92d3ed00a9f72b13cbdbabd283d5711565b16c88bbe. 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/UKZGC2304101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925397844f2906e8aef84fd07ac7b45fa5ca367e0bf8912dbcb41a3a6a41c26a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/UKZGC2305785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48d52497804b10f365f439b95145730f346f4d5c92779db9c7b9a3d0b96eb05. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:06:01Z), 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/CA5KR2416833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc216828a7965cc672b2e5169de1c4cf89d45dcbddc9f43fe31597cfc41996e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA5KR2416834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb210ecd3bcc9815ef77b4fa1cf2f17017f100127c28edecc3be720499fe2023c. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:35:00Z), 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/CA5KR2416835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f4cf038d5fccf075f8d035a8fa5698b098093c22a185e5baee414999db30b5. 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/CA5KR2427684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c06bd9157738c8781e43293a955df49fc38488284d1bd11f4f2984c85fc02e8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2431347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d5ffda0c14908ead8c4dd5b52e5dc7f1d253a1b2c27556502fba67929a97bf. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CA5KR2446098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd67aeb972b9764bb45a2b4841371493f28b12592c931212c97a456b63ecc352. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2494132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f4cf038d5fccf075f8d035a8fa5698b098093c22a185e5baee414999db30b5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2427684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c06bd9157738c8781e43293a955df49fc38488284d1bd11f4f2984c85fc02e8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2431347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927eed67d380cf6f6b293d881450e516786750033bf4a49ec6acd189a2daf23a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA5KR2494133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a36693f4692559bb1be53e79e41436f3b6f7eeb0c2abfa2072ab7959258185. 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/CA5KR2494134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297ff17dd7af9ac19dac746780769fc4714e714b11afc0b489dbcdf1c93612a2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2494135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788c1b9d29b275ba073a1497261646bc1896bd98b8dbc68134c44b78dab294ef. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2487223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed91966495b936ae49b84cc7d26e4410fd8f6dfcd440a76f61470f81de1f19f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2494136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b6f3a9d833e0eea7a40f50a7dd4d4937e2bd2ffa2264b421ac208b15689326. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2494137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02e0587e7bda56a82905903d3110483cdd411f43591aeba3d7796b1f70fa50d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2494138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d37e660366e320bc2a4772d8377e52ece74bfc046d3d6a84b5d4971ed42f639. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/UKZGC2507552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c67ddafe31f3e35f087aafed587d5d125e1c1a4fe09b38c7517819352f2ce3a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USANG2531115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc33edec230c2c9af4dd84c74902b642995bd8dc35ca23f6f2c1b39ecc41668. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TX2326179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788c1b9d29b275ba073a1497261646bc1896bd98b8dbc68134c44b78dab294ef. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2487223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8d09535d1b1c3eac663fd7c6f139a2b38b4e64acf2d72d56a41841682b797b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TX2488509.