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 0x9127752041383b8b5e5296666348225caff394a31ff611309f79d2f136c4378b. 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/723aa51a-b79f-4334-a675-7e384c7a8fa6.json and https://artists.proofprofile.net/proofs/artist/723aa51a-b79f-4334-a675-7e384c7a8fa6.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 0xde7dc5572e0ec6fbff3d097470abaf47ed1c6176f35d5dff714c390f1301276e. 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/QZES52279611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362bbc700c2c56fa3892e8838bbd7afa8dbcd9267c4f3577d82bbbf7b57113d7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZK6L2340589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b5e8c3fe280771b25b459c02e3caa429dd68d655bf92c2bc1fb2613c86f92d. 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/QZWFG2390985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3daf0468c4ac8cf51133af06ccfa51d6abd556a1214311b2bbfbc20021bff33. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:00:00Z), 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/QZDA52558313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf77c3a1102773db9324b3f7f35f09a61f381d83d79567d5139e6dddde06b50. 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/QZDA52558315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31ea4ebf55a8118e1df3a76b6dbedfb8df66d77069cb52380c4e72c92d6e7c2. 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/QZDA52558317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581d88e213f6df61640a488fbd6663601c04ae95dc8a10ff2f89c8317994f186. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZDA52558319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ea45d1a15e2c349ce88d1a5b888c7d080380a7c3785af5811a0aabfb2d1c92. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:41:23Z), 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/QZDA52558320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3ead1e189980f25ae235d6373eacf1e9c7db226aa2f899d9c20cb07bfa4f5b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA52558321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57e439eba451611547f15314410ce6efb66409af7a548e7b06911e1900f72e0. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZDA52558323.