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 0x5f17e20473d3c6400dcabef20dfaf0f37a96dcbb98d6e2f4a4a539cab6f22c5c. 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/58249ed9-86f6-4a6e-8350-ba98cf79b41b.json and https://artists.proofprofile.net/proofs/artist/58249ed9-86f6-4a6e-8350-ba98cf79b41b.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 0xdff71405ce4dd43c69f6e5419ca0d38684f7a5b979984ee8bea0414a3f3fe2a9. 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/BC0562200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fab0b6f543990d1ac83a9a53c088f3a2ed78f1d10e9b4fac3690586b38240ed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZW9L2285380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83efd6c9f5ee31092fd5f9c961bf3c1f5e80893c61955993921fce8fc3cb6e3. 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/QZGLS2277537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7445e5fffaa1a16aa398361ecc81aa5941c426867c70f8f00f5dac1299337cf8. 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/BC0562100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c4d4118346b09c834712af6ecc382e32270365343eb6f5d888bd195c82139e. 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/QZNJV2176261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39430d0672c99af6efe8e28d8d34f8c891f53ea2cbd023251151e38bdd473aac. 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/QZHZ52127515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142e4a0564a9e92b0f87eb215f39bb263037dba7e64296d049ef9a7abe6a92f3. 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/QZHZ52076598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9264f908b304ddbd5e7b755c4e1bff456a6f7076f32b2e3ecf35c2b365b8b2. 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/QZGLM2020745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9092caa669c13f8014d90252aabf76e339729d8d47727c8f59dc3925f3520d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGLM2012578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bee95be2c1b63e20916a6e48cd77ac4cd1f3a7e1030831532dedc7fbe847d2. 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/QZHZ51959959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293662456105447105cb2a73234f842089dc9ac9e2b71bb43e861c7cf6658d2e. 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/QZHZ51936232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c5e398c2b2a60abed57696b628e93bd7a8b01402534cee130dc0f61b6cc1c9. 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/QZHZ51904368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b60a9672ddbc238b20dcb951271531a1a7135879c829e20ce96ac96a7226fb5. 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/QZHZ41965212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d2295b9c35055b8be0e02743c7de355fd8f64834078fd1817b89523144c7d2. 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/QZHZ31995903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b594d3a9ef0c2ac86981bff6ea23e4ada8aa27219d7bf478f46e93cb6112393. 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/QZHZ31955381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3565d2ecc7888f7259ee86203dc1c68147fa4824aa874dcdaff62eb2a7a76c37. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ31937294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02de8c99f37d3fde41730162db9cf9192e3c771094e23a67d877d50ac3ef0a29. 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/QZHZ52146934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f6ab661962e644a741cf002edfb9ae7146c64f33004c55fe19be73903747b5. 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/QZHZ32143230.