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 0x7db4f5ad603d90f2d1089a7e2dd04b485e52e97b26e5c8ad3f0a7bb664a628f7. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c018379-ac61-4183-a911-b1cda954c172.json and https://artists.proofprofile.net/proofs/artist/8c018379-ac61-4183-a911-b1cda954c172.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 0x1cd49f9fba321b043fbe8d8eac8f407416816d3cf8408d6c32fac85c7e6d425d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWV2564904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b9b62b73c466a633f88e0aeea947f4d1d386577f514f927d3a4df7977a0ebb. 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/QZNWV2564913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d53ff788efe85b0bd8f52da1f4565737b5ca70b77b08ac496dd51f75d4cbe61. 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/QZZ7K2516000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb64549787209705347515fc534b2a4614efdfd7315b1dc47ee0aba1ebb26b0e. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZZ7K2516001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b964159a1250f073b00c0d54d31d7cf1aaf697879effca8f7da0a0da914601. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZZ7K2516002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf757969f4e3d15ac3c3b73b67d179206a6317164c60437fb929cbe8f5ab2364. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ7K2516003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e0a9c0e502865bef2fce0b7477dedccf9146432fdd506c71d442a48c4f1c9d. 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/QZZ7K2516004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff146ba0d8015757dbda6063ddff9d13b1bf856c9be47da7964f59368fdde997. 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/QZZ7K2516005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a849c01fc8b9d88d7c824152e91e2509a60d83dddd3ff44e65068112a03d94. 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/QZZ7K2516006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec41d29cafecf1d473cf144cbf9c4187d6ef2f42231b8ca05dfc9ba7913b46b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZZ7K2516007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6eafdc2c8e6c8adf420a4f1c04c4c17a974f7e431bc6e8a16c7f2daa4c7c32. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZZ7K2516008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fd50a9ee5f516a00dd2c77514d304751ee0c6719a97c9b0fc09298b7c4d819. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/QZZ7K2516009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300430577dde2a3e53c2386d93373ec9f06fc9bde40f34f0e4dad04c7b1caff1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZZ7K2516010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246077c3d33614c1c467012315788bfd12188d641f75eb94b5f5016e94227358. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZZ7K2516011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d1dc788d5af8faec86f9879bc35c3c8286c933277e6aa5ba3467f5094cea97. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7K2516012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914f4f9f2e48359182f0e797094fab899d6db5bb46c65a4d085b97c106d03175. 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/QZZ7K2516013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4b665b67d543dd766fb603b4e8e91ccaaa77a37d57416706b3bbf0dd607156. 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/QZZ7K2516014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c4afc091dec2710f7072e220e30f727c8ed53f34aaea18049807adf9a9cff1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ7K2516015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e33c7e7bbf41b7368c91cee3a4b6540c375e076ec3d8f029c3ff47bbe8c90f1. 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/QZZ7K2516016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2e23cc7dbe47ceb4717e60ec6d17ba8614627fe09ef4b46a6831d3bb07476c. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZZ7K2516017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58aba7e16ca6a51219c115439c9f25b8c12c21cba1275eb2b2345ed74364d83c. 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/QZZ7K2516018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab4a4f61f22f04072a632cecefc3c688b28fe51433d05c355731e9d31e5c761. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZZ7K2516019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab58836c95cfaf8df1df057062761b88a324e0a9130eed21c512895a4dde0efd. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZZ7K2516020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a0a0fe1cb617c164b15f2bf50d85062435a102003ec2202b732680ac27afa8. 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/QZZ7K2516021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d95fe882a36c9b14dff7125160668a31ee6b5bdeed25c2e853fde42d436007. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZZ7K2516022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ab8025f22f098595d48b155fe9832aa2923e92f1430f85d31974532f990654. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZZ7K2516023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da299ea5c2700609c0d5ae23cb1aa5d0992943b7190bc6dec92ad4bd97ef5b7. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZZ7K2516024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342bc6824f9e24a3e0713f0088a473d4c50ccb2fd35585fb2e3a81cf56c22f62. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZZ7K2516025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ca15f5554ee4a0cb67ca07c9ce17466a0c74d718910ac6e3559777768fcb7d. 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/QZZ7K2516026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4239d633f98f327db8b6f836b0fa29b2ac402bf76414a25406dfb071906e78. 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/QZZ7K2516027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20b6847819a2d33cc20bd84bc76d5358e9c6518d24d5d5bbddaa2a796665814. 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/QZZ7K2516028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfce39c29594edfea54b4384cba1ef4706b7585aeaa7f949da9ec5175086234. 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/QZZ7K2516029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b7aa0de1aa32a7919b5397bc75b690fbd77dc618dbbca70756898d12d287ee. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZZ7K2516030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f772b120730c56bc9c3a221d0240b86180729b409e07e807c09e56c091cab6c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZZ7K2516031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd29f897453fd53117a0655f175e7491b0227201e1fc24427359b9d0d2c70e8. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZZ7K2516032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727a9d98fa89faba059cbff0edbcaa0203ebb9557aac569b29abedb421cc3ef1. 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/QZZ7K2516034.