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 0x96f2376a057e1d19255d33d3451a39c3cc5a3a343cae513ddd8431e5c77f81c4. 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/d20b7c6f-6514-417a-81e4-d690408aa2c9.json and https://artists.proofprofile.net/proofs/artist/d20b7c6f-6514-417a-81e4-d690408aa2c9.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 0x2d04583091abacc10532e9d89f22ffda8f681e62ae6f2309c1efe523a868afd2. 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/QMBZ91707039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4425c0768a900b14bda91476802479ca5305505f4dd7ba369ebd7f702d1be3. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:08Z), 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/QMBZ91707040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426d5134f24684a3efd2ad1f8c7d38087e2cccc2b11baefc3ca05bc2ad0e789b. 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/QMBZ91707041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ba850c75f18144cadca17a819a0ee43bbbf16688718f86fdf906b4f206b4cb. 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/QMBZ91707045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d17e76408a4939797cd0365a285b6c2d22847a5a4d2b9439b2dc0d45708b19. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:35:26Z), 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/QMBZ91707046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3387b1559b7c5593a289a957b3cd1e54c02e5e1e78d5f83f86cff5c5e15157d7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMBZ91707049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642866c3ea05710dcddfc66943835bd0042b06880931556811cec526da4f52e5. 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/QMBZ91707125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caad5ea59b5ac86e4cfe9a96e194b77b4f4bc9cb254269add7be78df204499e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMBZ91707126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcee1c3a83ff1c116e0687f767a9300dfd3dd0d1ff3379acb450b832d74991d7. 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/QMBZ91707134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81fc781b5a21604aaba0377ea8f843cfbc6d01db5e415abf5d9faa3cfcd0814. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:53:27Z), 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/QMBZ91707135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99014459ee0197577869fe6ad08894b2f6704e449ee180a9cba42c634abbc02. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMBZ91707136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7092f8e74b6b293a6ce4cd20dd2afc61f93e9cec538b82f82ef516b131c134d7. 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/USZBG1112787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcaf14ef74714fd14469277a2851260d6729c507d678b277cc8c7f80a3f56db. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:53:35Z), 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/USZBG1112792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f573bd4bb8ecbda226f10863c404ff43c8020978528f31d5a791ec559ca41ce. 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/USZBG1112964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed36599bc7fe179ae75d062d33353a27378b3f818a1ff3177d15d077a3cdb37a. 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/USZBG1112974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaacb9a71a153ff39bf0a931dcb69f01cf3f0f33fec7707d69da37c5a4ff291. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USZBG1112975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19dc623fe835abc5ec5ab731d84c40710bf8978a38bef15dc4fd0d42e68737b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USZBG1114337.