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 0x9c1c787db49699f1c3f951f3ea9b449ce0b9656e4fab4868b1ce0a9e0dcca35f. 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/31e5e4b0-9d76-48c4-a2fc-ffc7069957f1.json and https://artists.proofprofile.net/proofs/artist/31e5e4b0-9d76-48c4-a2fc-ffc7069957f1.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 0x9001aeba5d98e6f7f1a2d71df5dfddff2cacb045b140e21ec8eb5a5ec504ea96. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZH5E2434212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e62140e88a7f0f39b495a3688764f1f8596dc0b69c23d39309871673e0e6542. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZJRB2170866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb16e41aa03e8a085176b36cb9d4cf9aedc0c174cd5619d2a0a7cd3f14669864. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZRPB2101416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefb49d9b1b7a44b230a0375d4c020a7c0f5b9c26b036f66125656aa71fc0068. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM8DG2277128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924c818497812c7fc67e00bf72198b7de83caf0483652165a7e4bb49072d58e6. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZJRB2209219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b9877f4c730951874877306fe6d40f1cfc686c38faf6b5e30069108ff83686. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZJRB2256550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb0b4583be0838d3119842b8997605797e9e4e792809ef4e3db7d98f7df2fe0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZKDK2342926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c30663af488078e2af5b2c54bbafc049c1c1ea916f8da68d631c05959397cfd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTH92349902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc735237c3c8bb682883ad01f3cc088e558461a88b0caf7160f803e3cff26803b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZS652314038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8460b431b9bbcfd76c47cbd93a7df6faaaa1f0db41b12e6e1616b374e2dac10b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QM8DG2369681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972c215aa1c1d807ad18c855580c05153b5473d5f8c5a4cfac87f4a8f98efca2. 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/QZFP52324168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546a324591a69d92d577ec81301bfa6dbdc7bfcbe83e540f1da74fcd5b0f1fda. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZFP52371935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9eed8daf250509f5126f23ea6d8274103e05bb62a83e4312abefd53b25776a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZMHK2490410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f073da09bd4c6b16050d80906fa1493ddfd547fbb504cd42855e53752a87bc. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZMHM2443852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51da40d077ecbbf21bfd24c54d2f8c71cb0edabdabef407c30d571b4934d4274. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QM42K2487392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8b64cb429c57f4894ca7a84219841722676135c934c68918257a158c534502. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFP52239487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e83aaede538f126765ae3d41a04609098955d7b85643dbde1d9dfe479a51af. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QM42K2585616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f33cffa4b6043fb6634d284ebc5850d56c862c9f3126840c3d85b02c0ff1a78. 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/QZS662517212.