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 0x0d3ce8805af9f2672ed9f9f6d8d05a7d3995d566dfde03a00025c019442b6efe. 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/9ab333aa-0f4f-462c-b671-6feb481aa01c.json and https://artists.proofprofile.net/proofs/artist/9ab333aa-0f4f-462c-b671-6feb481aa01c.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 0xd2ea8ca07fde49388282e9b573faf040d32bcde880803e341acd5844f8a383d9. 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/AUI441200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a55bbdc35b6003f0b37084948b7abcae3351ae6969e0856af33d994f866b74. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:05:33Z), 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/AUI441200125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb5e5d503952e86c3318f1ab6b2e48fddce5f56897a48fafafa8b482635dd67. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:10:04Z), 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/AUI441200131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1887f722fc2ea7f800b37b4e637e42e31367e93f23b8647bc7d73207dd774f9d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AUI441200278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6d94b8b3ccf6fd01b755bda3861e5fae3a5c2fa5eba99710a388ee6bf09119. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:25:59Z), 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/AUI441200281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68aa7d1d81223daaa75f99aec8a1c3569ac2bd64b9a598f9092577618fd4b3f1. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:05:41Z), 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/AUI441600172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90715e6ae12a65fd6a76fc30d86460adc9aa1bab7f36bcb46ce1376636fcea14. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUI441600176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bf27451aa633b3190e0d7ff19d00acbbc2f6006eebf28f5ca258bcbe37a144. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AUI441600177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ebe99777013fcb3a626befc02a2034d198422973f48276148a68fa06a31f6c. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/AUI441600178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd284c665110b88864caecec52f32197be9fa9e0582bc0b179713c96ad9949596. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AUI441600179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b78d3d84a7f46bb142f46ba0741faeed169901ae3d1bc140a4323e5618bec5. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/AUI441600180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99d2b5e3c232b8d366d4376153262212c262d3e2a14992beeb27832c62e2ae1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:48Z), 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/AUI441600181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85a5b907da8daef9b38fc734be03e9378710db2008edacf04ea8e8313f6bc61. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AUI441700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1870f6c5729db1b7c5265dd259bdf3c83c2dd3b19f40f5303b1b8cbef69cf74. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:38:38Z), 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/AUI441800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d87d137fe0f730a0449a63b967847671ef5d59d09357651162a74278623284e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/AUI441800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940e9abb0727ed55e8cd708beafb56a0f57883869b7ca72efb7fd3d2ec95318b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/AUI441800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7677e003a913abdaaa4453bb389c0b86533cd1077f769afcb8ae9ba793a10744. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:16:56Z), 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/AUI441800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33cb01b68f661a7c6426ff3a866adb86528e3ad095ecdca83aeb7a468150a9f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/AUI441800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc40fe97932de47a56e369e0422544ba375396640656654b085ff89b8106972. 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/AUI441800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab05ef78b18667166af32ab9d68fd57f5d53497b52ed09b24070f45e8cfe57c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AUI441800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4237b7baa302214bab14ad5e5498f5ab28fd03f66f06b19e4702afe791d4bdf. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/AUI441900130.