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 0xd29024fb2bf201f4498576d2c798914244ed89007e6fbb42f87b09aa488de211. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31298a52-edf9-473c-98c3-0c849ef54239.json and https://artists.proofprofile.net/proofs/artist/31298a52-edf9-473c-98c3-0c849ef54239.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 0x19ae017d603c3b3c00c89b5baba35e6bdb3fa32ee56cfe4a834f6ab03af30069. 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/HUA612300158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9078b001a25fa4f3581b628fa4770663534fe32fb98873465b906cabd433b9. 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/FRX872396919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3ba47cc4829fcfdfa7d6371fe3de19006c6fd91f81f1c3b351bf2cd39c39d0. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/HUA612301101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0020221527b762a552a9f16ae0522123edbfbc5ace5adb1c450c80baf17c486. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DGA052327971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95eb30720d16c7cfb70b8d070b623cc68d666ca53240a9c9db11c805dbae395c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DGA052327972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972b3f60454c82f44206ff96248aad66d0f8f82412f9abb40daa1ff5701c79f0. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/DGA052327973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63480fe543ee13b7dde8aba6e201b6fa668253676b9d511855e551792fbfe06f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DGA052327974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfab3c62ac7f9be6c985eed775ddc524d2185e393f024c9d4840e83bd8d52df. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DGA052327975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f86e7628fa0a372b927816c6264ddc1e55f14993f4728790bf2d99d5ae80a28. 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/DGA052327976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fce5392e5cb116e7667e6e4b1b67d1e99f63592e86667be4e955cd932c95c8c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HUA611802655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2761c81ae9eeea567a026e2483000ed3641f9b4a00fe9348b447530bb3129dfa. 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/HUA611802656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05192e1789f3795d752ed11bd3fc31c61f13088cf31990b04c4523c0fc2739de. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HUA611802658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cb213f4ac6970f66543f9965414230136db6ebcde2ce320b99245e9ffd87c6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HUA611802659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38f31087d47aab08429ce1e72e0571a60bf94aabfe9aac0867e669d756a98ed. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/HUB281207763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c846914c03fdb728f075f09dbb4deaea1453da64512a1369b4631c66f578fc. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/HUB281207767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4393426096bdb9fd681593ae01902ea2c86f05649e240c27ab206e9f8f7fa4c8. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/HUB281207769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb159173f11365de4a6036577b640560ee57d9e3be9f9af1c62e983afec01289a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/HUB281207770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086dd78cf1d7e5537ab61c55a8d724bc1dbe045913038ccb7f91420a646e0ade. 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/HUA4F1500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e6b8249cd70bc4b882920b4b882cc3dcd9446e9cfacbc6e8ffae9dd024a98d. 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/HUA4F1500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63f68b6309e0111a9e8046618ac3aa9e79db77cd05edd712c276e12a7ab94cc. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/HUA4F1500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7423372c2b6a521f2ffece4ec29344fb82df54bf886a0fa667e7294c8b02d43c. 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/HUA4F1500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ffa5004ceaeac4c3aa07b7c267d5c85026df512090c38a1677bd6a4321c751. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HUA4F1500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93a782ec87a03c48f088f8d2b810b8ff724c4eae844faef1c53eb688503ab93. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/HUB281208112.