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 0xb262360f92b6dbf1fcac4c720348efce1dc41d4fbe1c558302f0c298fe28e217. 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/310cacc1-cac6-4b80-ac7e-0e8f5cd16c52.json and https://artists.proofprofile.net/proofs/artist/310cacc1-cac6-4b80-ac7e-0e8f5cd16c52.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 0x24ea31f2628536e4b4af5c0c7f9b576c05e5c2e6db43c497f44f1fb0e3370ba4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USJ3V1842794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d90a9dc72e3c331201c89b9b63f45b01b06532bfdbfd9aa4ac7cb620b8d740d. 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/USJ3V1842795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91f89b8b97f9997c5cc58646e6ebc76d537acd2d2892b7bd9cbcae492c94e2e. 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/USJ3V1842801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6524ecf49083060cded77080605748f9af1dac59da0de0b3ddd0207cd47a158b. 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/FRX452026965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71095400690a6e917fdd1abf4d704f89c966b853e720e824a1cc518d6502e175. 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/FRX452026971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2808f38b8ec712bd5de95c765d669cf1113075efbabf0ede5709083f93be4d. 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/QMYW20400469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba1f80890f48f5cad59325129d556faf89309eaad337bccb6001cbe2a1db95d. 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/USJ3V1497696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff6b4da4cc2c0020c4a990be6234061384a4b6e247e8308c6a6ac354d1d147a. 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/USJ3V1497697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe959fedc1ca167a0e150fec0894ca3585b59590bab71c52dc6d5bec07a8bf1e. 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/USJ3V1497698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9598fc4735a9485a9566b77f731b4538a07eb1439b30c643a3a8dc31f1bfe9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USJ3V1497700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b545449f1b8a3e0d8f254580186fe713f2e384db2dcba3178155d27226e856. 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/USJ3V1497701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b931bc0c4df257fbefb42571e95a2925fc390a82848b51c1ec49d39c38d3f12. 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/USJ3V1497703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c3add6eec0085ad6f1decbb7391f8555ba00076e004e3c3d94c1f2fa392319. 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/USJ3V1497596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cf5617a06bf2e7b7b1a06842796b46bc028d326145388c77034fd980394a10. 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/USJ3V1497597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fdc009c6c115a91cc04881792220a632b0f011b0b0fc8cfb8d4665832621c4. 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/USJ3V1497599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4070da5e25ba53cfba4afbb19da9a9a093838ef73dc94fce302aa06c053e6c00. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USJ3V1497601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25feb3bea22f33cdf223be1afdaa0a1b5b51893ca3874c77c847b4d0bd760cd2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:56:47Z), 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/USJ3V1497603.
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 0x45d7ca7b227de47ef788ca14c795cf362ce63654c8523786020926eb3274b29f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/US3Z40701035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6741c14d553d3858afe43338020bb85f430f9b82a589447b8bdf2bd600a20de6. 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/USJ3V1497699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6658daf9a5b94766c3ffcf36cac7ae2ab0efc7800f83641e0d9d5b513cdf3dca. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USJ3V1497702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961eaf70f91338b7217ec328adf6b58da58381f2558c766035f9f83f942fe5c6. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USJ3V1497598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd245e02dac0adcd9a2792706908f37f2cc9892c92a3dea390a5cdfef178698. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USJ3V1497600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12219ff6dda36f143aab9d8547b19db225348d5ef08da02ae8dc8f0baf730f4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USJ3V1497602.