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 0xd8efdd0a1f43801195035249972c913d987a3909c4cf8dc59cfa01206d0e76ff. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0eb21455-1d02-4b7c-98b1-386317666ff9.json and https://artists.proofprofile.net/proofs/artist/0eb21455-1d02-4b7c-98b1-386317666ff9.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 0x5e9c78c30dda9d814fc4172361cd9cade47a81f2f919f6a02707b409278e595e. 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/QZXYG2307729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7e0d20be02e53b097c38b7d396af964c80489eb6d0c2f14ff4ae05c904ad2c. 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/QZXYG2307730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cea0b75468f26daf38e58493712a270f845dcb784251204260f0a7cc8ee656. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZXYG2307731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9485ba142d4bbbbd0ded5e5ae7874704daebe9427a9ed788be9206b8fa36f75. 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/QZXYG2307732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806cf4cae270e8b087e51bf2c145bbdc5edd04133e53aad14cfecc6809bdb886. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZXYG2401058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c7ae434b1752e66f6c73de5572f96d336fbc7830d332d621d1c4a53790d82. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:00:56Z), 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/QZXYG2501522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08476dab7e6338f90c81270ddcf55c0be75213b4759cb2318b4b62694018ef6a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZXYG2501523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f8660968eb38a914e113639e3a7a83fdf1445840e4c1356d211537106d1376. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZXYG2501524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1110e0da289a3684bf42144f8128ddcf42143759e7fb5ad07fa5fd879ddfffd6. 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/QZXYG2501525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d7b27595ee84bd4bed6828badc9211a5e845bf7be50a10d9c605ff140fcbe7. 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/QZXYG2501526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0b5e49fc23c32f49c780f03e3c114b54d61a59f9ea2bc0b8b1dd9ae68895c9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:57:52Z), 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/QZXYG2501527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9077cc264cb6a5733adcf4b93578a468a0135edd3f93b1373e2a86c7fb18e5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:06:32Z), 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/QZXYG2501528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9b3836258e01d9f9eeeae09993f4a745fac60a178f1b812da1e1fb15bfa5b8. 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/QZXYG2501529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe27b1255dd75aae267067d7e09a8fd360242ba06d763e0865c09cbbacc5014. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZXYG2501530.