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 0x2c761c4a33065656f649b117a21df213e3f67087573b34e654068bbd042ccaae. 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/7a51c19a-a2c2-46f3-a555-e6ab21711532.json and https://artists.proofprofile.net/proofs/artist/7a51c19a-a2c2-46f3-a555-e6ab21711532.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 0x125d52ba4c140274c21f79f07ae9fc74cd2583d0830eb0d4165cdd4de3ff0571. 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/USDHM1422615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67392a1b87281b7c1c7b31e9c58b80c489ce5ad3e6620a2af24d65558d4808fb. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USDHM1422617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56c91e79ffb74aa8f9da5078b8ab10d53fe7b7fe8bf7cd4e495a74921555279. 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/USDHM1422618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2321c2c719556f3ab9e7479e491d8b0c37e19d605e35030400cc89ea57984d. 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/USDHM1422619.
De la Serie 3 Gigantes de la Música Norteña
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8536b40f5e0072a3371789ad30e5b391e80a75ccb8c490473e41b57d9e7086a. 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/USCGJ1551619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef03ee45c63bceb0f0a0889d6a4e2b1debd73749dbffbc844d6b9564ad95cc26. 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/USCGJ1551620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02973a574566e2b853152239a71a45ac04f63153ac7b7ed465ef4f48006d4d8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USCGJ1551622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58a865dc7c17da916d7d56156e816493560b0d06f74d1dac8214d7014d85354. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:18Z), 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/USCGJ1551623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed86608238144148a0d954461e5d05abd4798ce22faf1fbe596c444149ce4435. 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/USCGJ1551625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391d6a19028020a39183a3b5c6e48413a6161048b7d830b4c1acc65c54a3cd93. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZDQH1819152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390f00deedc4086311685b051050894e7e8e597164f0146adc4d09df779f04de. 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/QZDQH1819102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68000f36e1cc3174356968f3b0f50976a925d24784e12fde3e5bfb5f3a20027. 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/QZDQH1819108.
Los Dos Rancheros, Luis Y Julian, Lupe y Lalo Mora
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd752fbf1c34faca90b2aca855ceca59db8a191d533708111ad8b7e8e1146fab1. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:02:09Z), 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/USJE62505095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9007f95f3f5e512c00e9a7e6107b49c5c75f491c165ef3c119812e836472f48a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USHM91680326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dafd1353e29cd3786ab1167bd6df10b9c1710c7cf460b7f9477c8a0bfab828. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDQH1816625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ec1a9c5316d358397042e1d08f97ae5b20b1edbce654ed3f630482073fa443. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZDQH1816622.
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 0xa5ede25026cc660ace774a14a65cb1b4920cc2f46978b834210c327d51796d65. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZDQH1816632.