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 0xa804a04cfbf9f65ddb17a0021f03c702029ab2bc9e82a8a64c17112d08166ea1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa60f457-0141-4fe5-883b-a5907615bfae.json and https://artists.proofprofile.net/proofs/artist/fa60f457-0141-4fe5-883b-a5907615bfae.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 0x943b1c9427370dcf20f2737123193f7b24f036133d975ecef8b18690753f0383. 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/NLCK41072240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06366d96ad9df44276c9bcefa368bd6706d8f099a317f8e6e052778e5641ccd2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLCK42231013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb320b3afe76bf3e9fd1332e8842da78802ac84af8ac91879a23de410c2a0b8. 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/NLCK42235774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06366d96ad9df44276c9bcefa368bd6706d8f099a317f8e6e052778e5641ccd2. 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/NLCK42231013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06366d96ad9df44276c9bcefa368bd6706d8f099a317f8e6e052778e5641ccd2. 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/NLCK42231013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916c091e65472c205612524cad76fcb4dc0a84930570d48662e1f8f1c2cb15ee. 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/NLCK41054670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895a837e8c7a7a77eb808f84dafba9e40937e9142a8f703a4bf6257e47ebe612. 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/NLCK41087095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ed220b3e3f269b7ca1759a081f17771bd1e1a389162a43ce568a4c8e5911f6. 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/NLCK42219782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058820ef4c276fcb9dfe27df47abfb6a7159ffa9807164dec149d18d164c1921. 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/NLCK41046411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756a9f6d2aca86e30b28967ec25dd1154482d75ea1182b77072cf1de31636865. 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/NLCK41059202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08cbc7b2e7b79ff8c64b2f9a747e3d1db70515de0eb850b632946df747a0bef. 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/NLCK41059203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058820ef4c276fcb9dfe27df47abfb6a7159ffa9807164dec149d18d164c1921. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:50:34Z), 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/NLCK41046411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb320b3afe76bf3e9fd1332e8842da78802ac84af8ac91879a23de410c2a0b8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLCK42235774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756a9f6d2aca86e30b28967ec25dd1154482d75ea1182b77072cf1de31636865. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLCK41059202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2e83c6a62323c2c15e8e69ba7e9b2afc102a9d71d91264fbb5689de22ca8e8. 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/NLCK41034450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916c091e65472c205612524cad76fcb4dc0a84930570d48662e1f8f1c2cb15ee. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLCK41054670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08cbc7b2e7b79ff8c64b2f9a747e3d1db70515de0eb850b632946df747a0bef. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLCK41059203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd94164f8585aea42a26b4b1761264551145c72bd636e61ac713146fe683359. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLCK41056121.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch