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 0x5ef2a0263a99f1526fc511b80dfada6cda5d71b46881016ab93d1d0260bf5523. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2239bdf7-3a3b-45a3-9b17-0b6cbca95d0d.json and https://artists.proofprofile.net/proofs/artist/2239bdf7-3a3b-45a3-9b17-0b6cbca95d0d.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 0x47e224e32143cf8852e79f7d681fd6ee3b183495a67c91fb1464946b93ecb5ed. 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/GBKQU2335178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc528de28ebfedfa0dc12a6f260403a81de494a97979b8ee97edee5bf8a3a6608. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBKQU2335179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d04c12d1587af5afafc3dd7e9d54e887ad24b97dd49ae0d9c4fcc5432fe972d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBKQU2335180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d05f94a452e2540795bf343f979c91fb3c624c880433a21914f448078fa80c. 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/GBKQU2335181.
Get Physical Radio - August 2023 (mixed by Pig&Dan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b8d7874171635fcd979504377f06788f6397711910b14637aa8a61b368b98c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEBE72300779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf208540ab2c003d06e3802973bd1f96f30586f93aa57dcc0b9e8167a3e7e60d5. 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/DEW872306451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2430d0bf7857d42e07c1ed20d14baf7ef40b1056f9201c96efe2d746010e8ee. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEW872306456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9ffe0074c0a8929b796110823a87b998152306015b8c230f1006987c4eee3f. 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/DEW872306452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8fdb0799251b05ed1deba20d1593a121458da794969b8574608f7741c98f86. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEL022320013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064b143c6047956ec09549d66b59546ed60c70b88508b8abfc7025d3f1348474. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEL022320014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2053864ef50154056bf93c07bee8ebf27f46c71936cd275fb17347a455016025. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEBE72200821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8918c18330a06020d801e1e29c7bc34a06cea7390121d1afe27a0c9d5e4516b. 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/DEBE72200822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12801c77aac55f8f746add5986e6aacc8e2e686185d890ab9d897a73de8599d3. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DECL12300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dcdfaad1891aab0295edc715ca23e6eb7c6335198b3928133b8871c11a9c75. 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/DECL12300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dc41958d05721c88f6f4d4b08e610b6a6dec09cbe217057c6a999a77b7d3d6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBKQU2402305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7dd54bc7d275dade742708d82527fb96a8f71f1023cd4e120d7e991ebb6473. 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/GBHFW2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691482eb33b75181b7bf0ba82b61558534627caaa11f38cdbbeb9f8c85f74319. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEBE72300507.