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 0xb9ecc03e6278977597331b946ea06c5201cbf4d9dad15d78bb07b02fe4ebd082. 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/207e40e5-73ff-4778-aede-9792581c60d9.json and https://artists.proofprofile.net/proofs/artist/207e40e5-73ff-4778-aede-9792581c60d9.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 0x18ac18e2e50f29c48713ef0838b8f200d5fb87b1066b9242330963b7a035642c. 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/CZA231500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a8fa5ae3d83a384a31ad8a0eec0702f48f26decee0e6358cf263b379ad55a0. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/CZA231600214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ce42a27a15eaf0c74a922655b2198ac9d4595f34e473a518f97c0518792a41. 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/CZUM72201090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ac640e0349d0e8c6fda2273e3ae6a1479a328ca7e5a7e3150f584505b189f0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CZUM72200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e95907b63377fa0d7d2385eb1f7a8782cc94fb01c17e9597e693d9362a7bba5. 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/CZCA42300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479c1202fe4eed626fe2d50c551bad23c7bed341761954fbb75c69f826cae9e7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CZCA42400303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd818c76f9ecde493c3ca33301acf403fec9401aef7f6e00645421697e8b3174. 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/CZCA42300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc89df15d9560810e849aefa83642be446f21bd035355c02446b7b70c310caa8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CZCA42400307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8acf1656999b81ba7ea4253a09cc563a799def12a45b0231c2ab27764c5d9b7. 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/CZUM72200944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ce42a27a15eaf0c74a922655b2198ac9d4595f34e473a518f97c0518792a41. 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/CZUM72201090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843725a7934be97aecd16c2261ddd8818da25bed58be2bc57264dc71f36390c3. 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/CZCA42400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1562c3db62f4b24d12bc33a8d94fb0221bb57d8d9fada406531b63dafb2b6a. 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/CZCA42400312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc146a991cb2c20c16d939e34a59d7bdbe6ae4afd14ff9201512e7d384b72e2b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CZCA42400313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e95907b63377fa0d7d2385eb1f7a8782cc94fb01c17e9597e693d9362a7bba5. 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/CZCA42300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd818c76f9ecde493c3ca33301acf403fec9401aef7f6e00645421697e8b3174. 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/CZCA42300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387a4490dc03d739792e093adb44e6303429e74b0a15d3f5e96194ae8e1594d0. 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/CZCA42500320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755127a17032802eb4877e694ffff8f9db5cd23cd0fcac465c8d9ad08e4583c3. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/CZCA42500322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba023c096bb54e7698f6afa572f0475016b2f014fdf33ce798ebdc400e437ecf. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T09:58:33Z), 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/CZCA42500324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fcb71b03f59a516d7e7a2f8dd7ae2dd4123d89f9bfddc00a75170573012fc5. 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/CZN732100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f13610a7c821ca8bf0bf277ba534bda64c107b1b7fbb734a03c29f5f6c8d02c. 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/CZN732100043.