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 0x0d5fdd0ec68f40c297f61030f3e19f92aa75aba33045e22a66317951e02e0a77. 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/902ed6d0-5d8e-482a-baff-e1d79e982846.json and https://artists.proofprofile.net/proofs/artist/902ed6d0-5d8e-482a-baff-e1d79e982846.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 0x710559a17e04ffd34b8020e3877ed3df7e2948a1cb1ed1b07bab390064e76359. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3W72200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b79ea9c0120de2f9b2a7fa49058877072a191f18ba5b3b29f94a272a7de79f4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USNPW2300703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc94015ae55d529c0ca984b7521729379340e6be7dfada59aad327836f821484. 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/QZEZZ2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dda9cd452bf88117a9e293b5dfc87c0477bced0ae7ef6888c8ca460eb775488. 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/QZZ662465033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dfd549e1709f89fb895124578a42df5403eac28f66166478abed6eaa04b25d. 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/QZEZZ2000803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a6617621f5dd6fdd23b89988d1ae4e1947a5a23fe978c058f3115441b59160. 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/QZEZZ1900976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6c079b94c6952c1c4ad4745ac299ce8b453a3cfd6d15e543f6a75ea5fdadc1. 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/QZEZZ2000805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c72dc123eadb2d1dafb3770fdde9d02969120e1b6a1a4f87d2ae3ce6e2c8cdb. 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/QZEZZ2000807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ffacd65ffbbdeb5e586460675e5bd6f012cf2936968dc77282ce292198b433. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZEZZ2000808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45105c97dc49ab49f9bf8c5a7989ea22ee049b411c2cf8c73fe3636f792320e6. 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/QZEZZ2200408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e47d7532ef8553e4688037303644dbdf09f136aa4daefca7bc85da9081853ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QT2JQ2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec89c78ffa4261dcf5faae8288f4f10122a948058b90809143ee6b5c934430df. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZEZZ2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272544a389c8783d77f9813155e9e5a7dc067b2b622c3c404ef4dd92ebeb884a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZEZZ2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f50776d04ad09d6729480bf58353768272f3b74b3b30aa39865727ca295c67. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZEZZ2300348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c447271c6783104766988b8cf06bb6477997bba2867e35a1187c62fc68dbcc0. 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/QZEZZ2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16731f74205e03dc65c5f59faf6d8f20eef951539bba1f1d7ffe081c811e28e0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ662343641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11d06b3aedae6a0ac694740e0c0ff0fa1200b32dc4008c52185768140d9d135. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ662323948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d10889a099f6d7a0ac16e9a9c7d72c68e35da7f664f8a20c9dd1ceee30afa1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZEZZ2200339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9851bf33318e35858730dc0a881d4fcb3f7b19ab5396731b3bdb95a521b0bd42. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZEZZ2200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f80ff3b98a39dfcd51a29b9de7e25e2391ec2f64aaf1ce3022f268007e1ca09. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZEZZ2200213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3040e740b1e9988c010b1003ec718a6ab16441c849c86364604e3ef0f03c99f2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITF252300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7129aecb273ac68e4cae332d39414dc93511ce876cab8c99f68fdd0a955f60. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZEZZ2100689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b1329eb0755d78c1db627719f89b0d7818c21da699cd02c394921a9175b5f8. 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/QZEZZ2100589.