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 0x72f87f6fdd585ce4f76d44ce2711031c66657ecdd0e523a6fec751cb75fdc2ee. 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/413efd3a-82b5-45b0-8c1a-2dc66d08674f.json and https://artists.proofprofile.net/proofs/artist/413efd3a-82b5-45b0-8c1a-2dc66d08674f.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 0xab1ade550157cf2252e4853a5807580bd834825fa41da21bf2a42adc109458ba. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR96X1751193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9623541c3687d625a39749546aa3c1bc69a9505ae3e105665f9228b4989e06d3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR96X1751142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2757b460d7a456bdf450a1134d08ed88ee723c42897d218f58128edc8ed725d7. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:44:53Z), 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/FR96X1751206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228ab9ba26a1ab89a5033305e3bd13804447031bc1e03f4bc53a0b013461e418. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR96X1750720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9235ef0427da22f1cc609f46a83348dac6c2b83cff168b0dab84ba6098464744. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FR96X1750721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901c7a8e176d510d94e673eae6344f357fc65bc760e1094ca6b17d8092efd735. 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/RUA1D2289804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0adfd72538406ceedaf7fe97bacadbaa222977fd483fce4723a8ef9ceef7b2e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR6V82021377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4859fda520f60f51ffb848cacde6c8f9dfcf6e4508306ba8880d4125a044041. 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/FR6V82021386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc92248b752a06fdcdacbc3236e0b10a7a53f527f336e9b72ded3f97c578b41a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/FR10S1481135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665395ee83ece31ac327ac1ca60816a078212fd3c932a3113bc3c14bbb76757e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/RUA1D2025321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74083cc37b5146144a8f2d66166b447fbc54aa25fe83588eec2c5ccdc7558184. 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/RUAGV2306942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9650a43659f87a47a8b8a3f0e7608a4704708a1a066a5d0ee023c7e9262e0df3. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/RUAGT2439490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd5e2c121f23668fa6028e37b49323ef46300b08e4cc9756674a083fd38f69a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/RUAH62405670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56a1cdf004d31ff818166d5920e7f5a3a88494fce32ee3ce0308b3153dca509. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/RUAGT2554182.