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 0xe656d28854f1eb67ff74914c97e1b448ca53e89a3529f0b09f3f89decf1ef735. 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/73eac6a6-ad1b-4f69-9546-8caa14e47e67.json and https://artists.proofprofile.net/proofs/artist/73eac6a6-ad1b-4f69-9546-8caa14e47e67.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 0x89eed6189380b6116eb752c64ff8cd94ce7ba2829d61c401f46283f8347dd670. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLC271700153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b0017b4db7753b33a9c4341a38ee64d8b931e2382379ba3daf5529bb14b855. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PLC271700158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b0017b4db7753b33a9c4341a38ee64d8b931e2382379ba3daf5529bb14b855. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PLC271700158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9c6a7b4f2a218e0050d80c9f741e4d26b96c422d3e5431e89cd78a01b05202. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/PLB822000550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894fd80dabc47b823cbe1c54d060c826035de0c2e1e0b11b191dbc19aa499c61. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/PLB822000551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bc849cc3dcdde82481e6e20c839f4d9049626583a80d29b3a86201a56b8095. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PLB822000554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05a4a0360761917464ecff231a360125e99e8c6fb414eb2eae4bcc569e72644. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:37:58Z), 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/PLB822000555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a78919460921ef07ae58c0b7bbd7cec381509e2acd49151894f08ab5246323. 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/PLB822000559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094aab06e4805a8347e38a434105a53fec47133cdfb4ea438f03c52bdc0bec17. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:49Z), 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/PLB822000560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd993e73e3aeb1b060aa76df1bc41db837a9cbddb00ab1f9826e3144202183685. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PLB822000536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b173db14d0f8d42d1293075d356e852b96ec74b26bac2a5c056e77ec29936d. 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/PLR862200666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7493b18f0c68ca791ba9e7de1cfbcfbc0b055d8324a3b37dc5e0d67bc940290. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/PLR862200712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b173db14d0f8d42d1293075d356e852b96ec74b26bac2a5c056e77ec29936d. 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/PLR862200666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866e0677a9e34afda28bd28fa423e9198d32810097bb259e8a7cdb7c1c4f2d71. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:23:30Z), 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/PLR862200714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38dbb2ceb42082a20827ec0087b4337cb7572b3de822b36079c6e4ac5c68505. 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/PLR862300544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af3ddc3dd4b5cad807d7b58831b52c28b132b05f61c9f990b25ca4bcb788772. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PL1682300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc850fedcbfcf0dd35ad04bf8539710f32f84e2e74a852c92efc75bd075176904. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PL84N2100007.