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 0x03122ca92fb1a9b73677c2f5685c84e334c6ea0759a9a9c4d18430bf155249c9. 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/4281a0f0-8d3c-4498-bcc1-7ed937865463.json and https://artists.proofprofile.net/proofs/artist/4281a0f0-8d3c-4498-bcc1-7ed937865463.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 0xfe19dd5e4b5d5992bff9405305ce5585946490b228fe4ce3b51e4bb8bb0bfe1c. 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/ZZOPM2003576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2164474fb648fb0ba101d7ce947359089d9f19a059a13820cf34e7b3f3a858. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZZOPM2004158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203ba1794c1b86595b3e6fe09d445b712e2a094f45dca881c290deb6539deef8. 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/ZZOPM2004159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c546becc5fd470a7cf52f8d0393211a3da5617ec7be728971c733ccf2f271e0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZZOPM2004160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d788e9e295c5dddca7cdbba28cb0c43edbd7717ac16fe775c5d0f182277317. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZZOPM2004161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78b1eb78095793cfc4b441d2597e4576a10c61dc6bccbaa1c0b11795b12265b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZZOPM2004162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff646cc09ba298a2805adb3e15833656e1b445219cc465cce2eb7c589ab0e4c. 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/ZZOPM2004163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff79b202a64cbeb5a83d96f8d6dd0de1bf96d5cdb21d8abeb7a9698e461d2de. 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/ZZOPM2004164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd193ad9139161c8d6c55f72017f6a34249b2126182935c1dd9c70872c8959a5e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZZOPM2004165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc8694bed2d66bfba9bcdeab35c9e6008832127386b8d48987bab8bddbc89e6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZZOPM2004166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942849412cbe5bfe2783a2e05348731a243eb1136b65f3cc5b49d60ec4148e5e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZK6L2207722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4c9d1dc26eb711a3b2ced7525c1463262928b3907f81a687db68d6c68e4e26. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZZOPM2110163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e04d1ae46d50f21fb6045a60933b7568bb6bc2cf0b563125f5bacfbbe97401. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZZOPM2107969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15b586758d66646aff8a32ea1b603c07d66525f35b27e34473630e65d40963a. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/QMCE32100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea999b504329e4a15ce0949e9061482aa28657be2075ce6b248c322c6cde20e2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZZOPM2003307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15b586758d66646aff8a32ea1b603c07d66525f35b27e34473630e65d40963a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMCE32100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7491923fffd56f479628b0fcb64cf69985c8277fa8e7895ed7a49690ec2df25f. 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/QZ9452200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7491923fffd56f479628b0fcb64cf69985c8277fa8e7895ed7a49690ec2df25f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ9452200103.