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 0x1f18d7b96e423c245326888cce58db0bc39421ea6a8d61dd96bcfe99973c024b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ff4b709-b375-4b67-95eb-00e22f91a5d7.json and https://artists.proofprofile.net/proofs/artist/8ff4b709-b375-4b67-95eb-00e22f91a5d7.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 0xd7eb22eb8a94a74df99fe2eb14573060fd22c83388c94278578691dee6795f53. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG662000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f9627c6b3672f6d5dcf96f05f972a87af5d249e68a0a63a355cd69ea2826b0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL5HJ2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c70e728eff8a74cb9d27ee0c9ea0833f9ba48aab9a7ca76d5d70c92494c970. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFW2152398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc8670d25da4bab952aa65861ecc1bfbbb03a2965a1feb9328ad086fc35c464. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG662200188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c77747a368b6a9dd4d0074d7e0b0644abb1cba626b5deef4e3cb9226e6ae49. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL7EV2200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f7ec28b9a08d5933c30bc86690fe87a23c95243f9bb174db1351a7ffe937a8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAII2459767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a465709bfb01b08683a53dfe026b86153c8e11ca4ed3808d46f16c344c7d67. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLG662000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bd2f4566c767265dbb8dbaf8d7e42b848b1763597aed9a97886a46b6f1431b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLG662200258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29937e4ec83decd4813efc26370167d93f5f131ae3aceb0aa8f67597e735db45. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLG662200270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7137cf84917f7ea7070178fb295d0dcba310c501870c9c4b3eff559a19041d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLG662200275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779655d9268a30777a067ee374bcd38c61c1b501518ef7ab244c3fdd02fb5a8f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADI1760844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e3ffad6563c3edafd83011e7be0edcb04b642c399a42c17a3c21ff2dd343b9. 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/TCAEW2090538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b1f6e41831b6cb8bad6e8704ddd50f2a59e710a3cd7ed94d8807827e21efb3. 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/NL1EW2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189e472f4d4dff3172f0ef91d584c803ca942d56bd9425cdc2b87a435902ccba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG662000630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2591c2642191885a8616a3dad2d4e909e12248d16d1436a2b7b6fbf3da8e0b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLY9D2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254be751b24be100f25e47bb09cf44b4f5e98cdcdd87d0e45403167125b6e1c5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6Q2104035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ccf2e22bd945f20147229a82e118c9bd15e343313a0bc707ff3a2af44b4397. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG662000533.