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 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 0x9118f10c6c578ee3cfe943b74680f21e3502fcc870698a3dbcfb681f6fa9c59a. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/172981a3-2f85-48bc-84e8-dfb7f3f9b8c8.json and https://artists.proofprofile.net/proofs/artist/172981a3-2f85-48bc-84e8-dfb7f3f9b8c8.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 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 0xddc6f2a060d364e8c38e75ca19838de2060627ff0a20faddc4c8e7d1f550e4dd. 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/DGA062317421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff15f7a9dad9f29c4daa4fc650252cb2ef4c2c9ae078b36038f0b813ffdcbc8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DGA082389513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e3c8bfc1db4f9c491308d9151431bbbc0e3097a5ad730ec75e6e8b76536cf4. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DGA082389516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe160d7f3463eab4ca664fc995ce42f70e5eea67454a5ded8dd049a5660528d61. 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/DGA082389517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a797f13385e987ce8d4bbf0cffbc324252b17a89735f204c48ce223a45b153. 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/DGA082389518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9775203a8eb114b41e76ab84bb5e8d7a8c07c830a0f2c69d40405fa05b65291. 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/DGA062381999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21072212957d76ee617566f1a4f5c9a90c256140c207a95b2b3e4c7364c521a3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DGA062382000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea46a5c42b6ed20e4900f94ac3e9a6640cd9d664516e191d38710e1726fad8c6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DGA062382001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711dcf88cff5f75940e19b682ac02dc53557358ab2038b46e0503bcc046702af. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DGA092325588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509fd478946adb1087c7d4a4f8fa1eeb9eb3ecb6d6b0a31e6e0d8034b5a77a18. 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/DGA062381988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ea168cf1a156e4e0939c4f71fa1a43f0fd81c06bb915ed3b77b3457d5917ee. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DGA062332387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9b6441b299146785f3a39d77995bfcc17a249197d6b27784b809932cc8a3cf. 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/DGA062332342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23cecc05764f4cd2886eb83ab69e620bcf94967dcc20bc1d9aa4dc4156f3168. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRX202376085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc441113d95e7a0c13ff578c50699faae65d131359760da589a4ee23c6e40b2b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRX202376086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea14ee9bc7077dce39a78ee247bc8ca349719f6ac7f2e79f9ca02b34969e66c7. 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/FR96X2348135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e388babefa058b7edb7959fc294b150d437fe42e32351619ca7710f58401f9. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR96X2348151.