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 0xeae3eadd9c015a5f3bc7174bcc5d5813d6b78135df422b19781e52344752b890. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/996e7ea0-a270-4259-add5-da7adb81e6e2.json and https://artists.proofprofile.net/proofs/artist/996e7ea0-a270-4259-add5-da7adb81e6e2.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 0x526b19f2e6ddeb8f0f84a1fed87b91159de03595a46903003f62718c0f812a1f. 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/SE5IB2345651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4eb7b1a8e68a409694c2b36aa3865eaa3c37ebc5e1ebc43242ab91c1cd525ef. 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/SE69Z2401710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a263e78447b7efc16777e7800cc33dd7eb3cfe2fea7b2f39733a015d8ed26d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SE69Z2415463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37267b5f3c10c526ff359d8b0b25138b1f0bef7779a9c01724d10abdb5413898. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:03:40Z), 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/SE69Z2433901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03f36c51e1e2f54c2033753b75541d75f03e971e5bd8fb678334dd62d07f86f. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/SE69Z2433905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e492d5e8573b6691a8b19295e6482f4c7a16582dccd1ee3de1ccb3aac1c1ad1. 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/SE69Z2433909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d984571fdb6f6ebf6ef007a7c3f03e1a84853f4de380226cf2e2477fb9823a1. 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/SE69Z2433913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a30f1bf6b88d11a54144d022447b0041cc3afa651ff3e631eecc84c535ab96. 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/SE69Z2433917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c43d4df1ad293d0552d7a335d7424c7bdef65cb1a4ef0791192c7f8be07298. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE69Z2433918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36420e0e02ee38a3a78ca787781da2122fbb3d0fc0f0c5d183d571c6d018ca1b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE69Z2420275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a26f6331a3855a5affaa479fd1e2bb3a28375bd1e1be287a27979f9716a598. 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/SE69Z2420279.