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 0xb0b402d2c31f7a7400106e71f89131d5b842484611236e775a1ce941888c9fed. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58a72f5a-7165-4482-be45-3ec6725ad5bf.json and https://artists.proofprofile.net/proofs/artist/58a72f5a-7165-4482-be45-3ec6725ad5bf.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 0xe3c4b90967a5534ebd0fcff1fcfbae1b48a1801497b92ef0ac64814edcd9f091. 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/QZFYY2597419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad770ceb5c94345b65a2324dec9fad740f065ebca6f08458d77db1237b1d231c. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZFYY2597381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab8efc5d5c16bccb52b994df3fb2fd7985b9dd1849e54073e0e67e83f213c98. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:54:55Z), 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/QZFYY2595493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35dcd9eb11f6ea55f75607fc505740ab9d16611f418da40b6e2dad0ea3a28a5. 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/QZFYY2593651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc183fd203b2a08851dd03c1c18ec476ad0976721a2f282119e39559f01430586. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZFYY2595510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523b4fb62e83ed9509169bd040ff9bc3db6b49621396898973de7f37cbcf13f2. 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/QZFYY2597412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d49479062848f6f79c6ff65584f43de5c718043453c5555752e76324534a3b1. 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/QZFYY2595512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3549213f91f6b9bd5dff4454910f61d3931a4734118335a318c5292b05e7712e. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:20:44Z), 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/QZFYY2595508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cb22b429da6607d7a8ce9800b2781ebd7069dae2201bd0c7da93c1cb6fab2f. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZFYY2595534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f857c8d98b1dc53dd739207110d9e7be962a86f85c32955c9c8e75c4deff42. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:47:07Z), 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/QZFYY2597414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ac558622c98b4357f4e9b29d73ed3511c093fd6f2ffac068990ee0a5f2849f. 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/QZFYY2597380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f7de5e986445b89f158bc816a77f2a3cdf1a21f307aa59e495bab2bceb53e9. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:53:32Z), 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/QZFYY2597418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9668ee7d8d75ecce74002bda1f4cbb3e90702cb93b33e177033efb6b2c2617f. 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/QZFYY2595498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ba1daca601b6a683820d29cbd1a4e4a3bd6a440be0e9d1020742270887a47d. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:34:44Z), 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/QZFYY2595536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c59b6bb328a06db3f3a302bf9681a2f8719536423aec3da875b3cf3987d0f70. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZFYY2597374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ab31d19f1ea00fd5b7f0ffa62f6c4be16aeac6e7ef5582a0ffc0198ad53ba3. 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/QZFYY2593780.