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 0x6bc6c8950d7fb332bc70dedd605e2cb0f3881816c85fa86e59b32c2e1a50af62. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79c92cd1-2f12-4d90-87f1-8b3c829cd2b4.json and https://artists.proofprofile.net/proofs/artist/79c92cd1-2f12-4d90-87f1-8b3c829cd2b4.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 0xce1837b39a9b2a20ab08c65dcaa1a630735fc46440ea5db54005c2eaf39eea44. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZC62431874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088fdbc1a3fe09eb44a8db7566c7a735b3c56b21758288d378da8e06a39d0612. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEZC62431875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31aa3f802fe39b0f7e7b300726e7771c3da717af8ad7ef630bbc389d62e4b1f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZC62431876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450ce74fc08cc4c60eb6b82986edab9b1fb5d1dc10611aa1b8fbab4b6e9af7e6. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/DEZC62431878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd823f33c5458cf33aee90b240ce8b621acf2ba1ccd0067eab16fb47e71dd74. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DEZC62431879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b8d41d7f915ed46233c29989a98045c7b4186058e67018a62112f809481ce0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZC62431880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8379b62bf93e954ad0e541c75ddbca931aab0543792464ed02d76691794ca33a. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/DEZC62325329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767346e4b19b255d0d6c89c10c101b42b02449ffe908207f9b33b96d7045d726. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/DEZC62325330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14cdf67335070b7135a5683b2bdbe5699ed95262d509b45f575b00ec7f5247f. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/DEZC62325331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297bad7e922084f053e86c2f3775e9867c05ed72dd4802d4a9a9da1c3bd45cba. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEZC62325332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0257a78b77f9d289eabb6a0e8ce2438df97c5cc93b4a7e47f3cd2f963f0b0e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEZC62325335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab2f737bcf385c13f2088435f3f250d389a505ba68403d0940abc7701546e2d. 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/DEZC62325336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd867cbb8e1cd77d058459165a603b04bf73cdbdc8c60c0d173de6558f1cdc849. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZC62449343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf60fb19cb3c0dc7312ce34aba52d59718d647928d26007f24a4f333b498010. 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/DEZC62449345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec36946adbb18b2b2cc30f15fd085b039c3a51dac419c99750666d3947af5576. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZC62449346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17fbd01c0af2205762854273fc0677d942addd8eff35de60ac98db5ffcc7672. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEZC62449347.