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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3fea817de6663a499dd9c0c978dfdb4c658a27810bb500b30472f3443f22cd. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a064fe1d-1cbb-49da-a538-aa3fe811c490.json and https://artists.proofprofile.net/proofs/artist/a064fe1d-1cbb-49da-a538-aa3fe811c490.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Plateado Sobre Plateado (Huellas en el Mar)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda655c5855f97a5401c71a1404dca0ea92449c7a7bc7194918e057cea07d525. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZW9K2468125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9fd04e36e696b2d6b5bcff5d7ad6315ec019db7395b3c5535357d3c7e4b9dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZW9K2468108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf937f33ec59987da74756304076c30d2f0e537bb59cede1cb891387ef426e7f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZW9K2481235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1605af6caa848058d270f06533b0f7a4977f6eae89a3ba64299857c79f7ac014. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZW9L2407559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9fd04e36e696b2d6b5bcff5d7ad6315ec019db7395b3c5535357d3c7e4b9dc. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZW9K2468108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81df24bbc0c46b0e191e7f8fca4f5af9468a5c74f0d9ed5a26396dbc3dbf760. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZW9K2468261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b5fa3d4ab7bcdef1acf79c5ae3879ab22f1bf39822a574f3bf610f1502f9fc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZW9K2468640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b6845f2d3ac91ba399f5ae6190ba401d42941b981291e3b963a4de4afaac1e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZW9L2407560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0456d8e0549782634ff06b2d571ee64b81a45539e44258975e5f13d1fc57ac71. 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/QZW9K2468223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecb363f9aab8fb8f31b8f14d968cc28988709015c2376d61ca43f199c4308b2. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZW9L2407561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf937f33ec59987da74756304076c30d2f0e537bb59cede1cb891387ef426e7f. 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/QZW9K2481235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6f37bbb8cc6dcc954e20382eac3313131a9d4adc0bc6011725e4232f74f25a. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZW9K2460139.