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 0x13755d13623361ea43acced92a27cdb2d7fb0f3895f4402cf69a28b8961e2361. 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/67c4bfb3-b908-45f8-8e88-53ba7c1ed4bd.json and https://artists.proofprofile.net/proofs/artist/67c4bfb3-b908-45f8-8e88-53ba7c1ed4bd.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 0x531ac50dc7199f580086a985b3b2415aa6f1e0b53ac0655849a0f6c453b2bec3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/SE6I32164866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad7e99f9bb6884308c4374aa3112a83246b951d68894e5be2dc37b9d92b6adb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SE6I32164868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc742a108b18a3db6cf2114209e46daa1adf35f04b255f1b3df2af5b2797185. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:19:26Z), 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/SE6I32164869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd888484bdcf8a75b0f3d73f80206a3374b61e7d388626a7e06bdddb535b0168a. 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/SE6HN2145307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabb09e0ff2ae1d8b43b0dea10326c55ac40e76f7fbd27254bd0c2d494df4646. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SE6HN2145308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccae1f35f6cba76669b94e3127a7b02953f02de1e1ffee52b0cef2bbd5110e0f. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/SE6I32172143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe35cc42709c5628ded80155bf9720be2e3034ebfa47de95a04c904ac374964. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE6I32172145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84732fc4ca71321e97a1b74d74b82ab399da68d5f908760ac0ad1417e9db18b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SE6I32172153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd888484bdcf8a75b0f3d73f80206a3374b61e7d388626a7e06bdddb535b0168a. 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/SE6HN2145307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabb09e0ff2ae1d8b43b0dea10326c55ac40e76f7fbd27254bd0c2d494df4646. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:06:59Z), 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/SE6HN2145308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b90ab6f199156d1dcbbd09ed6fa11b3be6b9ccd4f0e87bf18c7d72ba40f9ab. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE6HN2150457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d77b377eba7f92ce2d30374b48cea2a2a3b2b294335498762fbedf75d8b381. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE6HN2146821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4988cfc5bfe2c56f288189b7663d913e3307448aedb8a030b0eb8546410d25d6. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/SE6HN2146823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803380c9290482185c4001eb0c9217add217711c9a78b6a9f3eb5627daee35e8. 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/SE6HN2146824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531ac50dc7199f580086a985b3b2415aa6f1e0b53ac0655849a0f6c453b2bec3. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/SE6I32164866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad7e99f9bb6884308c4374aa3112a83246b951d68894e5be2dc37b9d92b6adb. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/SE6I32164868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4258b826e6984849596ea316bdb1de24705953125a3f67ad704140217dc1c8. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/SE6I32164874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd888484bdcf8a75b0f3d73f80206a3374b61e7d388626a7e06bdddb535b0168a. 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/SE6HN2145307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabb09e0ff2ae1d8b43b0dea10326c55ac40e76f7fbd27254bd0c2d494df4646. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:10:38Z), 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/SE6HN2145308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe35cc42709c5628ded80155bf9720be2e3034ebfa47de95a04c904ac374964. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:22:57Z), 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/SE6I32172145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84732fc4ca71321e97a1b74d74b82ab399da68d5f908760ac0ad1417e9db18b. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/SE6I32172153.