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 0xb5868f803d97d05afb61bd821216ebba02f854310ff2f8144862c5649bf6fba1. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fe95b5b-c2a9-4bce-bca8-bdea93c763ef.json and https://artists.proofprofile.net/proofs/artist/5fe95b5b-c2a9-4bce-bca8-bdea93c763ef.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 0x871a08ea24f7ecc22be26f024daf4298d97e47157303434a0b6b0e6568251eae. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:56:11Z), 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/QZMEQ2444702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7050e5598264c5a642a01d9b4be437503c7c58bd9571973cbcc943d27ce5ec. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMER2455336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445993db3c0caa4f8e086a5491d7050db70b6e4a1ca493cf611f5571d546734b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:09:35Z), 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/QZNWQ2419199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2e6052eebe61201d6ed9b6e5f788424344cf7d0989c8d571b74ad49c9b342e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:53:48Z), 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/QZMEQ2424961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ed33c6a0d868c3c6455de082b84110aa6bd2716876af266e6e2f34d697443b. 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/QZMEN2421743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ad8af0b435e733700bf795d89c299ac48f22daf16675d9ef16b723f6e0b8f5. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:20:02Z), 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/QZNWQ2484729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c4400e757577942b7981bb8c2ee372335e6d535662bba039f91cbf39b01e03. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWR2415569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb307393f560f215eba0b64d200e93e7610636b2a374497c002379a30495d89ac. 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/QZMEN2462637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b462542b720cd370d2d898f3ba1dc1965ba1d63771c64ccab5efdcae6627081. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZMEP2425440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44416d5d6097b15df0aa5bffe4c39090efce69c065acfd8475926b89d61d97f1. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZMEQ2442949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9641d1c1dd9d2f03394e5c8483771f981c0519d528df5ed14a63cb363d80819d. 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/QZMEQ2404881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ec2eb6360263f719e624dcfd8fdcfcf5ed304d976616f807b866eb63f3663e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWQ2408680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0565804ba57f3fc9e97741666f8138d14559a4922d77dda704c819cace1edf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:54:05Z), 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/QZMEQ2492789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0db16a1a520df261f52e938e6285f7ca24e51ceaa94811911375f027a38b80. 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/QZNWQ2451938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15df2d66271b59197e2b7e9053e6af4ceb2814857b9481095630dd80f10d9f6d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:18:48Z), 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/QZMEN2444488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2baeade2007b3bbc64e7c5d3343ad15a2b0fdc23e54c8daa0e5f2fe962efada. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZMER2450793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc797125fe003cf8d7a0f862ea8bcf0954d27e8d5c67f39facb72bde505529ecd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMER2428372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f75bcfff5772c7c2d523b62cdbc6e9c6d6cd45c6eeb4b6b6766d307060de77. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:31:29Z), 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/QZMER2487464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31b01feff3173467efeeeaa0370ccb376cefb1d468d84c7f6d7cdd40d572741. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:48:52Z), 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/QZMER2435339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fb99eae4a0e09c4e5e9f77e6efe33a8429e9c48500153239d7b7f65cf171f6. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:34:55Z), 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/QZMER2447026.