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 0xe6562177be66f6e3a2c94d796ebc28a70c9e9c821d49248e7cfe2c8a04d8f2df. 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/657c7b52-8a9b-4c7a-b72c-fb01fc02290f.json and https://artists.proofprofile.net/proofs/artist/657c7b52-8a9b-4c7a-b72c-fb01fc02290f.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 0xf8ffc70af9ad9190455738f49d131ba839059de00b9b57466c1a1af9d82ff167. 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/QM7282065389.
El Escritor: La Libertad del Pájaro Enjaulado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da280afa2588e07c5075a6e38c3026ca3b9cc7d36330b253f2f61ca7e0fbd36. 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/QM4TW2155976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f4d08dbba0f1a34ae5daefe0874043b85c89b96de83af827658c65d456f932. 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/QZNJX2101543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb0c3d38e18023d8385b20b38d80a63dc178a6a3348f35d3b5da069f6ba39ba. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/ESA092306703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e3c6c22d2b8664afe717e0579f6dd4cf0d4e5bf006bf15879b29a5860c401a. 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/QZW9M2439611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ce8d79def4bdeba054f5320a3664a4b53568236017a5a7d7f23808f0147f1a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM4TX2590872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69074e232c4db33342615112abb71dcb9fcf766279f3d30cd606c08492e6db3. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:40:24Z), 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/QZTPX2595505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56275ffad654c08437b8f717cea84ca7660012685d29382339b5fc7847341e69. 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/USCGH1871364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408129d3c6abecc3ea7f8013ec33cbbf4463b92a8fab29e61ae2ebff72910fba. 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/QM4TX2053771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc5925ce109d505d272380408735c403316e660175a14ecf725cae874fb3038. 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/USHM21949177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae250ad387cb76868ea1514ca423b9ec289d210494efb1d9c0f4c30093e7ab45. 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/USCGJ1832476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341b03ce963535d21b854da2ff9b54b60b693d21cf4f7af5678f2c2a0e37dc5c. 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/QZGLS2286993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4bbc7172745321389bb6433b54aa5fc069960a431ab18c562b7dd5e2013897. 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/QZNJY2155882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1863890fe64ace7296edb7d412973629bfc2fd00295b118024f63214bfc13a68. 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/QZGLS2286995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0f785fc2fd4a38b22e133639cab0d3c99415ed88b219b7ee5faa4339ebd966. 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/QZGLS2286997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fad9a8c2204c84116b8aa1abfd2bfbf7f3dfdc7d573a1136ffa2b334aa36439. 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/QZGLS2286998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba1a4bd6e66bd31a89653c103cd01b9840033679e912997407e85d3837f792d. 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/QZGLS2287001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1487b286a8c9d5055754be21e46c6edfa81ded3641355790e89b76a5eee368eb. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZGLS2286996.
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 0xf965a31bbc73313ae9d49d8c3e32fc01a7a0c8489d477186ae772c00f38ac6f7. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZTVM2138554.