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 0x69cf36a63b8a298f8685e79d7bf6638ccaa896b251c7483bf4d3aa536ccf057b. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9020faf8-f6a9-460f-a246-bfd8569d7309.json and https://artists.proofprofile.net/proofs/artist/9020faf8-f6a9-460f-a246-bfd8569d7309.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 0x7e1f2407b059c7b82a130fcfca3f15114fad8cc5da50fdae7ba8e19a6173b59f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:59:01Z), 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/QZNJV2173551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3678af5f637cb23ac19c13a8a8befd18eac8849cb35a01bfbf44fa0bcf20d767. 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/BRP372200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4f40ae4704473a99b010ff14679b2876d0bc91f6b04dec1072d9c83471d874. 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/QZW9N2259000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041f43772edad44b2974cb38bade93d36ca5daba6af9d6021dd322b261862ef5. 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/QZW9N2259001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ac9651c71c259e56902e1f65e0bf4c347ca1cf733ca00d16f04fdb29121ede. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZ5AB2322801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9be1e10736d809ca2a1c92b35f52095c34f6fcad0a03de9d70df9496d283b0. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:37:46Z), 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/QZMZ92353518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15562d9539f008ad00eb82e5ed3394af85e0a89dcdd5375e8714736b2356b02b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:15Z), 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/QZNJX2326914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6838ddcc5a1f20a84f8d886fff2be25b2e17c936ee5aa63a2560a80f0d5cfa66. 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/QZNJZ2473047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0c6585b88af6139609277fad7c6b834fa79cf950da940fe38ee2866ae2b7e8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZW9L2453967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e397757b217647793faf6427bf0976ff24c58bba79e2c7bce99836d406e89ae. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:12:02Z), 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/QZGLM2572077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9573739353db5be7ffc65733f1bfb44ed05e91b91f14523e4a2d33b9a82e6dd4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BCX712500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56390c4b9647ccd5ba206463129e80574db1785e586ad64eeae7336e89c2a2d2. 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/BCX712500022.