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 0x0f69cd80ebefcbd829f91c9baf233766b6c22540146d9aef9de88556c04b94f9. 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/988773bf-29f2-4572-b395-a940710efbe1.json and https://artists.proofprofile.net/proofs/artist/988773bf-29f2-4572-b395-a940710efbe1.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 0x625f74d154e2fa7f9347077b4ea56a73265b0544685392470620b72fe58de05e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/RUA1H2120429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e13047c05a4a22ff3a273ee7e155cd751f8f13b9086d34ecd0bf04226eb843. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:54:09Z), 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/RUA1H2120430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a6ea5a80a609ba74dce4f3534b0edd95e7e97c786dbe8668a9a0ddca5a0fc1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/RUA1H2120432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe088db29fd1108f7cd1ec791ec08503d56a9e10896a9c2aa249904a35722c942. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:31:04Z), 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/RUA1H2120433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2e1d2f9c85429e5c56b64647be387f8b69d7da537188719c0a1367342518f9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AEA0D2121647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ee424c531121b07763d666dd33839d42b5d143208e689accac268c57be42b4. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:09:57Z), 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/AEA0D2123185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07cb116afec45e4875aabaeca71df90f7d4d099949ad76d94bb1cb7fa9d734f. 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/RUA1H1883517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe282919244343f0256e80562fca94f2f3b782657c1264074b3d76eb19ffffe02. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:45:52Z), 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/AEA2M2116841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46201b5807521d30527916b864f469af81717f518962ca304213d5879e7b7ff9. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/RUA1H2261446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed424a62bc1fa120ffffe1f000a651306cebcffea097cab159ff5f63eb5e2ee. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:43:39Z), 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/AEA2L2262205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c31c3270101415ce50c405bf4cd61ec5a43087d14d4d9549f3f2e92b9d46ad. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AEA0Q2292604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e48ba17d317d664f409d6c0e7a15c5df934eff393affedd57da849847448de. 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/AEA0Q2492589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6917611483156d66e2244ccb7d11f0d3bc036b80a49544e64d7d11fad6d27724. 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/AEA2W2564727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7ba9b96b9727b5eb615ffc76dbaead22701db296ca104451b84b5e72c00197. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:34:08Z), 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/AEA2W2563916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e5c48b745366cb236fdd60f10c9f5718f0c7e5ffe932c53ff77dca08287784. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:36:59Z), 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/AEA2M2513979.