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 0x254a217411d367846b9deb44275bc8e4741af2a1bd2e0b50d3d612d8f73812de. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/600d2adc-e203-4d98-b298-99ad38b53b5f.json and https://artists.proofprofile.net/proofs/artist/600d2adc-e203-4d98-b298-99ad38b53b5f.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 0x599c38855ff63fe4ed61f94e8a050a5fde4be1133ddb707928ce2b961a0dda79. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITB551915515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa863eee1d1301b8ba9c6a3b73205de70a4f759f55e8719145ad68a2277e906. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ITB551915517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6f84e170a6a9e751ee01af07304b065ac4e339973f5d8497517c0dd9bcba38. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITB551915521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28562de729fbfa70502f3ec6db4b1ff3350ac2de9d77b3c21487213b8c7ddb55. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITB551915522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13335e378f1a8788831579a12d7f8b689aaa4573755dadd1990e4b72c1be2688. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITB551915523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229a067a7f20f718e572ece7a18f8cd8571df68eb98098df2f6171a8960af44e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITB551915524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622cfb7650b76912338f93fe2c851db29117aab48e47ce60aa263c6ea146e1bc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR2X41958900.
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 0xc2406c5331220746f13dd7676de7c70d6b18b5b2a81b55505ef1dd280a6b66de. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITB551915518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef6b8a9ecc88d9b95b5b655e4eb1415b40786a1ea4b37e669a6c3b75e096346. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITB551915519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774565b120ae78b7af34dd5dda50402661a256085d3847818b7f3ef40d26229f. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/ITB551915520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb277685b771655da2c0157557616c854af946b9b75b39a473c34032e513bf6b3. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/ITB551915723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d52768176d3059b71420689bc0b5b6425ab67c152556c7459ab983dddcb282a. 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/ITB002400224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea42beefb4f05b41b76cc902d4ad506fdba0f4357d59bf8cb86df83f22b0db5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITB002301026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd4cd7f9f1c3874b1777ac284ae541b327d5ce8687fbed2fb0b432085758545. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITB552216704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d52768176d3059b71420689bc0b5b6425ab67c152556c7459ab983dddcb282a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITB002400224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e952259cd8b7c28e5fb797144ad266a2f39d3e13e961ccc5e612e9d961bccd5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITPPB2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8465661d5a8156b943ead28bdaa7dd73353c2021bc2dbe91609bd66b5bb94a07. 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/ITUM72400762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38603a8dea1ec9ffe244660cb928898c9d8c9e80365bc747829103bf11bde72. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR2X42254373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b65cdd7f38ff490acfaa28968b1292dda1e83ae1f532d97850a26339d9919cb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR2X42262398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c554eb01bd2caa43c74567d1214f3026bdf2779cb99f21e449a28d5ed7a3667. 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/FR2X42262399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f77050a1ef5409cc37ae6e51eec0c5110b522a7c6a3235cb79cd20757b1dffc. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ITB002300004.