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 0x51a48f72df81f0fdd652e7a44a28a270c98b5f814d9457e53d113b5487d014b4. 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/7882ee02-0496-4c34-9e12-74898c52c3bb.json and https://artists.proofprofile.net/proofs/artist/7882ee02-0496-4c34-9e12-74898c52c3bb.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 0x5a5a6bf519ee3ff066d86326b2e74ea77c9147d74600d4dfb381b69e72445ed1. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:09:24Z), 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/QZK6N2168201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f5bc19f4f12bd0321e0f4eaca3609c29a8f46983fb02247fa91204f4206c2c. Chain 2 (Bitcoin): anchored in block 957684 (2026-07-12T09:22:41Z), 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/QZK6Q2184499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980447f15e9019275d2d791d50321a9d303e4e2f0a815061d88af7b6e45e09d7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:23:01Z), 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/QZK6L2143194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa148ddbcd4074034a36f31b0904073e14f3cc9f149b3de97dc150114ecf2f8fa. 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/QZK6L2143195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2890436099312af4e4d8b6479946f890c04d93f149676b038e53324507522fce. 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/QZK6L2143197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c75054adad75f9f1449aafbac739c63feb8afeac32ddcfd0cc3c8d65f3f250. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZFYY2518305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69940b3e40169b14972c87910007a0fe0af67e79e7dfb9ea7f237e3792d1f8b4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFYY2518307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a37a638351e284782c438be34a8d7db50f201bd8fbdc00667fcd96bf489414. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYY2518308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00892a2caa717b6361c203254c11e45402f363866078de3bc910794d7a69408. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFYY2518309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d8781e2071278032e5d42cfd97254722dcd865f6cd6c55a85c7b0aa8d7dce7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZFYY2518310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1997ce5f09867c67eff35e56c8716de2c67749fe9ea1fec97d9893c584e53788. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZFYY2518311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9d1309c484b2661faad4fcf718171e3d946e5e9d1007fa412a3cb4db6ef424. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFYY2518312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf33eb80ec522e02cb534324a392036dad6aac681fa9517ee9a462b34cfa76e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:41:44Z), 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/QZFYY2518313.