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 0x4b26df1ae17f528e43c18a83c9dfad12eaadd324922ddf713a88299ce1fcf93c. 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/6ed3dd50-5ebd-45ab-ad75-1556b20e912a.json and https://artists.proofprofile.net/proofs/artist/6ed3dd50-5ebd-45ab-ad75-1556b20e912a.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 0x6f150baf5228809a17ea975e943b4a5f8d0e0ab5e2283dc950990048051222c3. 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/QZS652312811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0c12bf5e49d0ef3b414d4bc85030bb94efaa6480cbf16767d60ed4086a09ee. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMHM2355587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37c43ab00bf94048a7132900a9af9ad3ae7dd529a731f6088401dce2e85c022. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZS642327491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb616ec8e7ae9f2ac57da89e0cc158e19db7312e7bdd13bf830a068512766d4. 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/ESA012303119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1a02fd4433733c725b9e23e7c37c8746c001957306bc8d4403ca76a607988b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZS652402156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9ccf5e36187c1c88e64a884946beb6d2432988e708e82bcfb9dfb4767ad097. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZS632493436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1403a21a91351eae809825af2d761348fefc651326711dbb10f990128f5305. 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/QZMHN2435988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0755aafec9837f8c255a80200823e94c9f8453ac8eb9c4958fb97fc6eb846ab6. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZMHK2479337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6be64548d714cafad71c6eaafd408fbdcb9618dcc63eb5f6328451537b15327. 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/QZS652450869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c5ca4ef9f5f11539b19add43d720b987924e585cdc1f2295a054159e26d3c1. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QM42K2464782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c38df82e556628cb90add135af73be8bb65d11269e4ec2f9b579cceef1f82f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZMHM2453622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbe8ae97caaa3ccd99ca4dd33432722f8bffe4394e2509e0f519870410496bb. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:59:51Z), 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/QZS672463756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00af96b6092fd356c3bcf85521a51a254c2f345d7e5a6caf975e6a59180e3c1f. 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/QZZ792470251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ec8bb633666cf7e9bbf422d8491eddc01859e465a53c0d16a9b980944182fb. 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/QZZ772479261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e41f85ab9adb541c588714870c5a2a98305ab31ac2f170d583d49fc9dd59a36. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ7K2418146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfacb0993caf05a2ab910bb4e011fa99aba8afe4aadaf68d77d44d8dd89d4b6. 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/QZZ7K2418148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b2034c47cb7ae638c0c325a0b9cf64025894236c00a4175e5a41e46cb72c17. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZZ7K2418150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423afb3e37afe4bd94718eefd9115c0705bc6624e246cd40687469c951788c5f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZZ7K2418151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483ace891a84b273342e7a1e691592702e136fb2a1a38894b6b4d1964eb5e58a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMHP2539792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4517b1abb7921cac9b88d15a97ae2b966675f60820dfb1f53af827a08142ff1c. 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/QZMHP2580576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e02516360bba567fdd085fce972feb5ea715cfadb13868f2378cc614a116384. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:10:44Z), 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/QZNWS2580575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e004d7412e6cf565b01bfe2cc6f784f08bfd907cbbcdefd82a7d03f4cb31e0. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZNWU2539044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec823963ea1abe28361a1df8ee22b2e44271eaea3dd5f265206d71bc9c6f6482. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZRP52540763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3ed7d97fe0200874eb8eeef9ecfd2a967aeab5aac8a5743dda48cdfffa9233. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZTB92529367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3ed7d97fe0200874eb8eeef9ecfd2a967aeab5aac8a5743dda48cdfffa9233. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB92529367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99524b8ea93ed68cf47cd1e8b27065264d587ef81b8be51a17ed02c4ec80b10d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFQ2570929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb43dc69882b3e1ca9b74042033f93e5830799ac65c0f00faef5bdd6a2af08fd. 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/QZWFQ2570930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d4215489bfa9ad4cc94a2ab7450eee2efa55d9135a0f1e94ab1759a4f2cc82. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:10:27Z), 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/QZWFQ2570932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3303e6412309136899de1ba0bfe914565cdce9752deff89a1d800c26e1cd69. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:32:58Z), 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/QZWFQ2570935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a99af0a0630e5f20ddd5c9bf1df740354482479c13996e342aab7a3806cdb1. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:08:51Z), 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/QZWFQ2570937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a833edb4787264b48a6c285b6af19f853c673a8cab870da57cf8b7c38c512b. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZWFQ2570940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7158595b379691d55bccafa5810aa51af1cd66c7541fd6f53fbbdb84a77d314. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7P2505862.