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 0x207b12d4a5d36acc63f8450716fd13e852cbc8e30a5dcec808675ed09fcac214. 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/8e590800-d787-4266-b4ef-9672d16e5c87.json and https://artists.proofprofile.net/proofs/artist/8e590800-d787-4266-b4ef-9672d16e5c87.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 0x747eaffee769335784ef5131424da348b8c6b5990540483687d53b5529376065. 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/CH6542205003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e2c2b961e1209c007fd7aef7d43e1ec7cc7d1fae4b35db76efae3dd71efada. 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/CH6542205001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccbade136cd20842dfd75c84c52a0b80c30c816350b192ff52dcbbc5cdcd0d4. 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/CH6541974092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8d7dddeccd5ce69115bcff2c52c4cd6dbf98400c8b27e19cb64ebf8103aa0b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CH6541839984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29773e691c9415bed481fe216b38fc976e8a742c985d5ead346430a16d000622. 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/CH6541839985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ede91327292447dd8a11fcae1a04d25c8eedd1f149fa9f0bdeb3b105da83d2f. 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/FRX282079629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d17512bf216c6f7c50c849a872137ee57f5bf5211b3f57c73f8d47c5774072. 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/FRX282079630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59add566b286db4e47113779ae617cd4b651915d4a56d21c46d97b9712cc0ba. 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/FRX282079631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfebe6252d4f4e9db05c13f3901026062e7878a3b2ae358cc2a9468dad577df3. 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/FRX282079632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522164f5b82390b015a99536cbd5e04a28d26c6ecc9ecde13fed2a4e215a8b78. 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/FRX282079633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62743d5d842cc9a8798ae249d14e41f2b88e3eec29f62b6deddf5a1e0c7a580. 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/FRX282079634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37294564bccd795997d03f1e85da92b4cb9b78933ac168f3aae4d09233ccdda. 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/FRX282079635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6034683d532099f1b4739b35bbcb0afb3504543cf96ffa9657e3b3440ae66495. 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/FRX282079636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0d9ef144a6e7dbf83c62652827b3b962fac94a08a07237e6dae09c053aea67. 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/FRX282079637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ec08b50e34e48b92fb03c5f315b5052b74329a0c35b1df3757357d2ad6b8ee. 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/FRX282079638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7fae954d6e0a4d1e71db98ee7b91fe36080c6441e4a52e7577bdf0c8cc450d. 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/FRX282079639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8843ba6367a01b16eff4ab55a85b0cca842c762296f6ab226b7b9662c8c49b9. 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/FRX282079640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8865122fb70f79e47f766ae958aac48e34b71c8097259e2f8d5f697a8cd23f7. 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/DEZC62585580.