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 0xb0ad886228bac1b688c7953ad8fe99865f8f37e6d4b0450907e8411dbf8bf08b. 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/f3092690-e729-42dd-9de7-fec85df0763e.json and https://artists.proofprofile.net/proofs/artist/f3092690-e729-42dd-9de7-fec85df0763e.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 0x9d31a530caa24a0d507ddb2151ae45b2aabc32b199c243f445b974b85f7a472a. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USHM21874619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a1f2d5e66d494de995329583e615f845d723ce978f54691e390e22bb9af063. 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/USHM21874621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3845b6917353519ce13f65b45004f721b2a35dda5f7c64f4408814c4143237e. 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/USHM21874622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06a597e15000c680c8cdbe3efefeb0a94329398e071104a6309857997991855. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USHM21874623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ff784cf88fb336ffef0da003c3c2f28e44aebfa38032728b4c10bbae89dec0. 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/USHM21874625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a31aa84e06044f2b26752f59b136d0b53c394e5936bd5193c3c4648a9005dd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CH6541647356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f553b8685827e2b3b425df7abfb91479c5200ab47c0d32f26485c053d4ff92. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:02:41Z), 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/CH6541642254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36eba25cb8938711e5a6737dd7c17ca5777773c8e829dbcd65f29276be74aa96. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CH6541642255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41dab2cb36dfd6a4c69b4405818daa96f4058971399db1a900e1e14c43ddc8f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/CH6541642257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076c455e7a2afde80a531c6ccd00ef4b5f2da00f9a09da85de3a94622e1ed2a0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH6541642258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4242f07b1dbb34eb38a077b65ce98d6517f3e620ca841ce8e7ef27997c719db. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:58:52Z), 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/CH6541642264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4169eb4ec668e8aa4c22969679399cdc247d5de57809fc54afb79c7c50112006. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH6542350157.