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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a93a81fd89c54d147ea7969862e2282bcc365ae72b5651d83b809c301d4bc5. 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/8d298298-5f00-4bb2-ba72-8c4a7ca5d0b2.json and https://artists.proofprofile.net/proofs/artist/8d298298-5f00-4bb2-ba72-8c4a7ca5d0b2.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d0c1a14b3f03a1cdfc7684f2352295cc17df501034f857b3a0e7e4772ab70d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USJ3V2412080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6107ae7a9019c4e7c4a8b39ddf312ebea7db380736303913ab7ef4fce57c42. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USJ3V2412081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb493de9d4cb3b503c57069fd1f1dd4d311f8c7a5ba93dd84a097cf2d463766b3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:43:59Z), 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/NLHR52138404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c3f35b2494d6c151a464d749e2f3389e052bc610e6c5ce3a983934e7beca61. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USJ3V2412084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5f5f2a26227dba094304f6eb85856e2273c2279c9c5dea062188a13d043f46. 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/NLHR52138408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8bbb913e19762c9607524a5cdbebf55429ce32a8f549be365400741edc4f79. 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/USJ3V2412087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca7a1d036a6ae651507b756c177880cc2beff5b112bbadb73196dc4ceb4eb76. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USJ3V2412088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab7b9c34659fc89b78b956b32ce321b7bed0f0c6a2e6e25de573250adbd6878. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T22:58:36Z), 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/NLHR52138414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa673b45a9da02a4ae46a04da2d17387935442ec1b41682b3806acdd89000defe. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USJ3V2412095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa429728737efa9e17d29ad2e265174ef3aff9293502b77a62e939401a9d39ce9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USJ3V2412097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109ecd7069ec1c19a858d755df5a95a3f3b565c56914605bc2471a69743ba345. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/USJ3V2412098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ff2fee0c97b496aa748fb722a177b33c1d58fbff1a1820df1f43eb4974498e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USJ3V2412103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a888bd70b262d0299817f1794128dc0d6f50bb0ae46bc4a40567221dad622f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:02:48Z), 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/USJ3V2412104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde26edc7c8dc5dd554a65cee897fdec856c308b67456740ff6612859a3ef5306. 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/USJ3V2412105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0d668ff8489406da0a32091809e85fae748473f14d38eaa0375843011fc756. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USJ3V2412106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003fa72de0a1b8890905afa0eb76c4196b910979c7165ef6523b8be118f0381e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:26Z), 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/USJ3V2412110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1022680ce8fb0407ba5a99e16f1662190e027e3a0823ef4fe23a757be1b065. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:56:45Z), 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/USJ3V2412111.