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 0xd9210f14df4bc5bb97b2251be93628e5f786d0ede4de5e7c602e2e5d1a6792f1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9dfa8527-2d7b-4615-9a45-5df9711bda92.json and https://artists.proofprofile.net/proofs/artist/9dfa8527-2d7b-4615-9a45-5df9711bda92.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 0x4c89fd491a9cead637223f8f4f641bc5e5acc31b1bc6528ad6f8750ae8947725. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:14:26Z), 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/SE6SA2247379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc81b89ede50a55d8e5df659e6f74e3936b5c2813b7a2de26a6b94c54810d0b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFYY2358366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf1900e747d0b9c0b5c2804e663ced7994e95ee624e59e5b314f34dd94273c2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA62349686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247d6768153fcd9fb0a443b8008ad9279fd8505f2d9e588fe48980d698bf2abd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:16:21Z), 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/QZHN52360054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbc0548f84c62e525ffe098a8f148106eb6cf8be83e6fe409a85d34f2d5d92e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN52360055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbc0548f84c62e525ffe098a8f148106eb6cf8be83e6fe409a85d34f2d5d92e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN52360055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640ae3b470230133c780886d8a2f74f96cec44809e1ebeee88f81e96b9689992. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHNB2393841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640ae3b470230133c780886d8a2f74f96cec44809e1ebeee88f81e96b9689992. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:53:00Z), 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/QZHNB2393841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4733d31f3e1025eb901533cf545c73525bab8bdf6096131d1868174ee273d4e1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNA2156302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109d0d6bb827df4f5bb38a51fca59df94cca3e19809b4a60ff7c8619ce3c9939. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBD2319001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa528f9337abee2f7fde9d4deb6eb0a754ae6531eba6b0e1d05786aeb1ea721. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:37:44Z), 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/QZFZ32438526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e894b5e84c0892cee989fbf12b404f38ab1def723d38812913d0886f9f20c8. 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/QZES72424275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa89939f9dd638b80f1b75a5ee00b8a68b8907196cf6bde039f2249ac999ced. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:48:48Z), 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/QZHN42483901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe06ea54a8261e7f3b9106fa15d6ead69e72efe8bf4e7301fa85cedd9dd59a48. 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/QZYFZ2519008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df78361895ed98ebba0a0960678a10988ded09ca09510d7e544b96f7c31a90f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QT6E72595991.