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 0x8e8a29865ae3e0fbf060a914ac33fac0611da6b1c711a160f3299852c2fae5b0. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58b17240-734d-482e-b8df-9276caf18b08.json and https://artists.proofprofile.net/proofs/artist/58b17240-734d-482e-b8df-9276caf18b08.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 0xa35ffc662f2534702373d2de9975399f763187bcc65a633d5fa6b6a446ef2cb4. 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/QZMHP2307087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04206291bd6668642432ded56030b6a10187c1950944283e8b31e47ed9d975f. 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/QZMHM2340986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7c5f7e761ab09041eebcabf0abb8a0575d92f8fe2ee97e3ea4c265d5d50ef9. 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/QZS642379119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a0ceb5db2b24b211f7f1b3d844ce86cd66e1f51739ed392859fe44ceb91bf6. 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/QZMHM2329538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd607a176c3ee564881b76b40b7fc2b56bb36e3436866609960b2ced7eb4fcdd5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMHL2399231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d19ea32d5bfc41491492cb9a6db990eb9e57e2eaefeb9038a79a0019ab8e1ca. 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/QZS632359970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea13647c4250a91492f2d3656d3494905da7db028bea3bc28b397b5d2fca6e4. 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/QZS632342542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9bfda106d5379b976c654ccf2bbd4cbc2226cf268d9387ca66e7deae104376. 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/QZMHN2354679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4621a8f5517c168e543938ffec79830c00dc373ac369804abc25db2ea6f85b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZMHM2374644.
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 0xca5c68571b58280e8b7869cabe6bc962086f28e4b58478121b4bab4f1bfcf4ac. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZS642369248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f17c4ec51b395e35005658bbb9fe07b2567760968a7cacbfe8c3f8ddc19476. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZS642373126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6d32cd98074facd6bb7dbbe665e191823b5ea326db99d10b5a7e4a71ceec89. 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/SE6I32474208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779456a459b17392a82f4ae6674507b008f055b18b525facacabc149fb1ca46b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6I32474211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372c86152923be7e1fe045acf1b3877ebbece7712650f20f67005d564086ee18. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6I32474212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbed9c78b067a15676b794ecb35584e5b1cab6eb6c9538b60b2c01d08c88cffa. 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/SE6I32474215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9392a1943a4cde3be14b1372e7a68b7ca3f4b0a419422e21c546953d8951f31d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5752442757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8700a145fcb2511a98ee952c659c59621347b61f6fdcf9375b4d0ce65bf18803. 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/QZMHL2322590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e5352940148ba434f249b2c9936a9eb57ea423f87bb3d12e36f79161c8ed85. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZS642346988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11d548887549ce18f8f964978482cdfcd4f4f1147f1c735e2874a055b073096. 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/QZMHK2377517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ece0ee7395ff07471ba52bd7fce996116bf42a19209d1c5c8444abd6c36cb8d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS642341611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f6905da7a0c155d8161c8d350cf92570891530c03ba32871100b58acfc0d2a. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZMHK2339903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe001d2629586d6eac169ad6c48c68a67d66dc639677b8404569a14182834474b. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZMHN2389826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20c9ca4b384e5e510dd7c99c24dc80fd51eba2fd26de4a50e5c1d0d76af73f0. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZS642326843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd56547da7fecadfc21c593672e2e0a623a7ecd22b4b027c928c7e5168ff50ca. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZMHK2326755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0488a25d170561329b4627da035249f2afd127c447742afe9748f972b4b91f. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QM42K2322067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0ce5ec506f7c320bbb9a3adb3e41038a995e4850421ae33807e0d528c4d7f7. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZS642389016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dec5495f402ea85eeb391d981ff5ba434fc92d5f1edf80087613e014ccf824. 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/QZMHK2375888.