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 0xa4672f2cad9336be448c9a4d735d895ac6dd139f270d956a2ea58a2ace2e4537. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9af64414-5229-4c79-9df6-6e82005530b7.json and https://artists.proofprofile.net/proofs/artist/9af64414-5229-4c79-9df6-6e82005530b7.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 0x060957e6d4137ff8ef67a1790452873088e537e9590986932632bec445681861. 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/DEAT71310704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f89dc8a370cce45eba1370faef225abc83980895ad70f8879b4a19c1ef1481. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:36:29Z), 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/DEAT71310705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28236a08fde0cf892ca28e2e4f0a3c9b276ecbde3e69932c18ff4ba526677ae3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEAT71310706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19edfbf500d641dab1628326b995648bb0e324f37a3544eed23d7d2b78dcdd50. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEAT71310707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba2ef376759b648e7ae362d4f358e6e30c36b9c8d69e175e4abe22e50f2c335. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEAT71310709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674af4554d98631008c8b7c970c407e71f18069bf844844f85dd576f4e4948bb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEAT71310710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462d2dfdc251d74181260ba689a64893334635455295ff7e20fa01bfab6da40a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEAT71310715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c5b1795f6058347cf2e1b9493412c8c2772944336c0b39eb275aa77ac26c1e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/DEAT71310716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a4b2f242204ca0122a0ee0d541da7a87eea166da4aa7e5366d9fedffe285a5. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DEAT71310684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a50dd5f988d30b4d87d0d70cbce67c8480c3c8016210f44b9d0bed306448c2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEAT71310686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd944640c5ab99100e2f563e4273950b180638d0dc3327498ba01887e8d9b667. 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/DEAT71310687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080e98ef9879d7eca671e08f2796fc280f37893ede3c6bdb03257aa25aed5759. 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/DEAT71310689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac03c902babe9e8fd677ed5df0d71d93056bdc402577bad5167d2f05a1be25e6. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEAT71310690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab4857b184a7e028721451933ea8744c6bd4fbbce6e140bf5b8d6a7233326d0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:19:00Z), 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/DEAT71310700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d0b9b88839f9539071dd70641db453d71e970ab47461d14af78fb048cd0abd. 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/DEAT71310701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc724759068236c178de4b7c02560b3821ff1991a4c201ac73ef59e70141c5004. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:56:33Z), 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/DEAT71722134.