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 0xc9e7400ffdcc1c64628c750265d985d59439b362d3f9e7ef92f7626cec5260a1. 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/598a4a11-7e8a-4bfc-8faa-c8af6ef64895.json and https://artists.proofprofile.net/proofs/artist/598a4a11-7e8a-4bfc-8faa-c8af6ef64895.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 0x0002db67cbef657b87be43f685026b6f7cec3fc2953d1a1d14dc860524cca8d5. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:04:27Z), 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/DEXW62300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66a7ac64ce4ad2c1c212f0d73972ddd268059bde6190978d97717e39acdc50b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEXW62100187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bc190eac44caca9c76cbda80b8a3f3e20ba705fb5c7f1022defdd1ca2a72dc. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEXW62300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e19e19c38c6dac81e5129f3e68d3ed0cda469a7f330c9bab79ba5efc0c6d1e5. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/DEXW62100212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f27ac082c98d497b660cbe2b424b017bf2b7ccfe239e83d1fe00a10c080c221. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/DEXW62100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46e62d9141a4da97705ec68ddfb916000fe110e66dbfc6c4679c80cf12d3a0d. 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/DEXW62200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0d2693aed4bf16067aaa08a58e22228bff72068620e73fe869be9133e300bc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEXW62200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5ca13e8e4218227f29044665e113e114cde7ff49c7dd0cc0f78228f4fd1ba5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEXW62200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1758e13fe05e3657dc7d7304e0e98ba2ae9cc92e472f4a2b626a5161a220bb0b. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DEXW62200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf7966fb2b5abd9403e6b1ff859f333ef90e0bf4d32ae32c04ae92ab704f7ce. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEXW62200152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1aa14be6152f24724822f720a232b9e463ebd33c1e4f94434373cafa47f4c48. 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/DEXW62200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b76928bdd8f95f3bec3268d412fb70e8a38ab21e9815cbcaa0acff8fc9581c. 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/DEXW62200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d00e49416ade4a658ac98061dab89d053fd84127d5fa379ee81db327eecffe. 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/DEXW62300447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9832faccfc824232685e5ae6c22d8cb79e53440dd923d59173980b59221e1d. 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/DEXW62300449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6046776a0b9943d30f89753938ca69c2da8501ea09c5678e4b0d485d1b729d5. 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/GX8LD2356483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7400599e418738b819373309d62e5b9eac81f10ac65204f75f3a8a737da265aa. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEXW62100034.
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