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 0x7b8feaa87d310237d314b9e8d841e780ebab9fddf3fe11072514ade4d338fb73. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4e22d4e-546b-41e0-888a-878ebd54fa64.json and https://artists.proofprofile.net/proofs/artist/e4e22d4e-546b-41e0-888a-878ebd54fa64.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 0x69f5213bcb7024bfa0333a569d5dd04d80e7c81469e1bf6f23c4476369b826ba. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES5990101301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b18dfbcb346d333ed857e0a8d72806235fdfb9be5bcf649188539cf0b5dec4. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ES5990101305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957421318e02439b7dc35d8a1e7169e423d08839872e50bc25d8df8777ccb7de. 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/ES5990204401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9501d3ef817dcc99a38b24375c0a7abab28624807470571d53e2f4b5b881e1b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:55:05Z), 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/ES5990204404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2f37e915fce452fcd52763029f8af8e6089de737efbe3e0b05062eea1b241a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ES5990454001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1f513fcb18baf961dfd1452649635134414054f8daf6de5b19df08171d4a6d. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ES5999920001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de1270dbdd30cb3b968e7ae1edf1db16e80c95f7ff9c29759f7abdbd768edb7. 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/ES5990244004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816947c6f964e11f20285988d287835bf92e58c44d89df8eabd7f3b890b16535. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ES5999920004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975487313536d3aff8e68cadfa8c2ba144341e4e64c389500d83fe80ebc9f462. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:29:53Z), 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/ES5999920007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d938344fbf0fad518687391d1122d64c8171e95da6f9fd722549e0953fd622. 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/ES5990132002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9254c4e7c40e2b81b5c4ec297bb36b269fea1699a54735aae448a88ac8ac7329. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMFME1555784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ca851c7a3f25eb449a0567a48393975cc74f788aa58b8e394f6517e3bd95e8. 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/QMFME1555786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8e87e86098cf6007668894283fac49ea251a4c92f93cece969ad29d399db1a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QM6MZ2143855.