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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac32c0f46b9e185715083d90f2c2b5966a3f09d52c5a74fcb8012a0a7be3b2e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26597004-1aff-4a49-bcd3-854382e7c153.json and https://artists.proofprofile.net/proofs/artist/26597004-1aff-4a49-bcd3-854382e7c153.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be9b9162791fdca17ba9b18cb5cb3d96aead06af13f05cf08e5438ab9a8e267. 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/FI5ST2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491e118dc560268bae46455af51e1bd50e44a4a29a22c8da0729c33e87af8918. 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/FI5ST2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ca93ef0a5fde9efdf6de59064c113f9a1c89d805fdd8358c2e6b3f31ecec2a. 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/FI5ST2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1266354de1787c0fa07ce54dcfb2c891b64ee592223ad5539cbe4c577cf01b5. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FI5ST2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63bf1afab9bd3899aa1d63f9b87c8430c64ef6f9aac09b78c350f50d953c966. 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/FI5ST2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b1f3efe891faaaf572fb00c65ded873f4f7af209093f75bd17ccdd1f9ebddf. 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/FI5ST2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6fff7ba780f22ceff7243861908ca10b37ce8e41467a2adaac219600ed76a0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FI5ST2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed391142119204a63fc48baef4077e06bec0582f8677515ac744b1c42096c30. 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/FI5ST2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f54af243d33ba97f82a11e899f53020e43390498fcecae691f4afb35dfa2321. 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/FI5ST2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffe4b888bb2b44663ccc3e776651e6b738ac7a171e4222c23374dcd076693b7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FI5ST2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0af1d4db865e2b9806f41e2f0f8923553e4dffcca3a9095141bb0d620362d9. 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/FI5ST2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a46b5d935611d829248c783282fb2818607301d860ce37949c3a64a418d2220. 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/FI5ST2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4dad46f1a83aacc81fd5144c0ca134846db69b193cc10f2ca8e87898c217bc. 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/FI5ST2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04386c0e9df93beaa23a8cbad187618b7cc9d0d966711744247683e609c8ac4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FI5ST2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48266f2ac062a512f779d3b1f964fae350835a19800fd8efb46d3ea0ce8ff92. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FI5ST2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365e3b12b8a9dfd134540eba510f13c4ff8efec47403d64fcdf3384d1a142cd7. 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/FI5ST2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a16a43e93718709f921b41f3327a56257dcd9aa64dded1282352126b2361d7. 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/FI5ST2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6aef05e6bc7ecf9c8462ca2226512c3253e6c05cfeb756dc0dcecefdf51922. 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/FI5ST2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24378163a56d71ea7ec8626abc83000e8b7463c08bbe1e8acee06359a8a5843. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FI5ST2100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b1f3efe891faaaf572fb00c65ded873f4f7af209093f75bd17ccdd1f9ebddf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FI5ST2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed391142119204a63fc48baef4077e06bec0582f8677515ac744b1c42096c30. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FI5ST2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053017bc7744ad9e70aded1d9a7069972c3315551cc6faef6375db653e88a5a3. 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/FI5ST2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4dad46f1a83aacc81fd5144c0ca134846db69b193cc10f2ca8e87898c217bc. 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/FI5ST2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365e3b12b8a9dfd134540eba510f13c4ff8efec47403d64fcdf3384d1a142cd7. 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/FI5ST2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0af1d4db865e2b9806f41e2f0f8923553e4dffcca3a9095141bb0d620362d9. 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/FI5ST2100021.