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 0xe69f509f9a0ffa43b5aa57ddd8f5e0bf963ea382cca54ddd31c98ccb66e8d4b6. 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/5639b24a-0c72-4a73-9e0e-5f56af3ca8a8.json and https://artists.proofprofile.net/proofs/artist/5639b24a-0c72-4a73-9e0e-5f56af3ca8a8.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 0xc8fb17a0697a2fa81919fc137516665e80e7eef08fe0a90158d7ac27b9150fcb. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZFYX1975074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4388e4210cf27bcff3b443f6d657ae704db1a9c6b7f3c00f35d5ceb3bfb6264a. 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/QZFYX1975076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf7ac133fd85bd56090c7dd4fdcb6f007907391336a4097330f166966efffed. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZFYX1975073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99e9618e3931dccf133a892583294d4f62b8a2441b5d9671eb54ed502158621. 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/QZHNA1907288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1641cfe1c8b060a8d45b16d67bbb0c778ccd739f6cdf5fd4f6d664319f23aec. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZHNA1907287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc126d82105a0c573739d65bf19cd67a2a6590a241bc641245bffe8892e4bee95. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZHN52056968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe371b80f1234b6896c1d3e3d64810e425a001440591b65d7ba047b301af716c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ42125962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf791c6666c433a3a3b59b6a7526ea58d6a210d1acaa2fd57e3aca65e5d34fa09. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZHN82393762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115aba2e27b53a06773429f9b730c00a01a8fd10150f447b6f3f2797b309cb02. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZMEP2485901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b7e46310bfcda890e1d98d1365214e460a00dbb0348cb796afb21f63d377fc. 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/QZTAY2428471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7703fdf19b20017ccc626808f2c49530b9f35563c07b001b931a95fefddc50d5. 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/QZJ842501612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16163e5c55ade8af3a99e477668d11f677a7f1d1826a1e76f0ac13b97ad0fc02. 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/QZJ842500352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4097834cdc970ee96d4fc0cb58c285d795d52abb51e62f40d632a4496fd656. 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/QZTAX2316045.