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 0x9d5d58cda2bedbee95dda2d2c119dc6e513ed7318c4ace9b791efe672efe1d18. 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/bb4f99a0-013b-43e5-a6c6-327d3c94bcec.json and https://artists.proofprofile.net/proofs/artist/bb4f99a0-013b-43e5-a6c6-327d3c94bcec.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 0x8bec8ba16ed88d85656cd7bfb5a1d9ec2ec657ea0459f7e80bb06f34ae701c17. 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/USI4R0800296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4adc5d05c5383cc8097526298bd3c8aa7afaf79101ca170f3fad987c6a0725. 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/USI4R0800299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ec41bbc03c7b5cab23f02d71ae00d39d634462e48498b26617b64d53bfeaba. 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/USI4R1016822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7858c726947788a633a2f2b01e04c60cdad1f4872fc16e397d7f9d30975bb601. 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/USI4R1121975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb855688ee2482dc0865139e90f86173492357b25a596f70d236e62a1099d9ae. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USI4R1220894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2ccd711563a1dc992ca4215737f355dd783f12d61363affb37a85f6e409778. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USI4R1220895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f0d3b2c247f95eccc1e61ba0bef59ac7d4ffe92fd5970f71d35d880621a244. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:48Z), 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/USI4R1229416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5a3f0d39667856bcf7ec7f86ed01ade1810d7d1190e43df867209237e40f68. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM6MZ1412414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba5ae7fa2ad95f323b98ecacc11f9a097a457c923f03b1368ebf4ade6131630. 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/QM6MZ1590477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb264fd6b2f2a0cd75b30beffef50818ee7277fd8685c9d48cd5a99b674394d. 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/QMDA71859687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8354f84e1b06b362108539cae2624d1d24f3b69eafa4bd7c0c02186bd30fb656. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QMFME2022276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc806379593945023ef4ef4b7bfa5ba02c5d3630bfbaae293527b12ffab161c9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMBZ92462230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623469b8e979d38a4acc4a36921a4d79219cec4324939b270857061ae4a8e5e5. 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/QMBZ92497419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623469b8e979d38a4acc4a36921a4d79219cec4324939b270857061ae4a8e5e5. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QMBZ92497419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd53a8b25cd4f930873a3dd4516a8fc873c6727579fed71ef1814298d8bc085c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM7282429476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df44e1e8111da87b85994ac3b1056f164d3cd00d7f13dc214afcb6d62a87b52. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM7282429480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570907f682fbd8ead01df53a369211883a1f47d8aa696bbb0f90938553ba7622. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM7282446015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc806379593945023ef4ef4b7bfa5ba02c5d3630bfbaae293527b12ffab161c9. 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/QMBZ92462230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44327f820d625c0922926d67884de1f49dfb89ebd2e771f2ddfb3cb0730849c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:55:33Z), 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/QM7282446043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197fefc96c4cf9d184c6eb045542eb2c45975813135730d3a9947f731c36554a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM7282579527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0112a6e7d62758cef2fb82fa0da52c8f368f6d4897d718982868c5c0b1b2c40e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM7282579528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e8cd0ad24c68db09c43f06d68ed117fbc9a53cb105d83a62b93574fb714722. 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/QM7282579529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3186b27e0da37ce9124080ed2fb594d006a1351f7df5e84aece8bd6c347fe1. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:52:00Z), 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/CH6542553217.