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 0xbbf56d326da92b197f53bd9bfa1b89cab67b1d6d8c3aeac637f488cbf74a0419. 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/415f961d-4997-4708-8e1d-ec62d9882b6f.json and https://artists.proofprofile.net/proofs/artist/415f961d-4997-4708-8e1d-ec62d9882b6f.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 0x4a6ae4e6f9d450bd629c77179dcb26d590c8a10455fbaa64fe09a387bbb01f8c. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/HUA611300401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fb5fb42f78d231b90b02c9169be47291a7f5e08a34d3bb20ac8c3b12831e3b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HUA611300402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209e98d0276a10e34f806fd60f48c32d7e752ed3b238e692e61d3643fe4b7448. 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/HUA611300404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bf86491d3178e3c91045197806321b6e08b5c27e7f430f9050cc90d38a540d. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/HUA611300406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f1dda2c8e7452a785a1a6757332d284a5eaeafeebc10cff7ce8ebf42a11d1b. 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/HUA611300409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7ac7906279988548c94a07613992e4e827a98d1bf1cf67919e07ba9b5cea47. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/HUA611300410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b77da261e6fb8f3d98992db728fbfe1e4c5e98307d106315eff0d687ce7a17f. 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/HUA611300393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61eb0881386299f03d93de145f4aa2262085cde23b2fab8967e470d7f4d40869. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HUA611300394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3740e7f7f44e9160cc1088fb66019baa8c393137abbacc9e64b5d32117174d. 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/HUA611300396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51989fce553d36ea9da0f857021758ff2b9ce44cd6fa42fcfba58479fd4bf6ad. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/HUA611300397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508d20c7755a2bcea6d516d01556c3246342029616faba15519e4a921858e417. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/HUA611300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592f2870715f2db8829ec59f50a63a326a9c18bafc5a36dc36658f3f484996a0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/HUA611300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417da004599775c1483fb2a5fe57be5b526d986ed08d4770b9ae12c8ef1ef67c. 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/HUA611300645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd205d45a5754d52e4652b6e5889948fca696655643b961dd2d4531bdda369df5. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:24Z), 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/HUA611300646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6a20e55465b9dfefc5490c8b9e07c01646f77b17e12bd6ea6144911cef3009. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:32:43Z), 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/HUA611300648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a1337d31add406fce5971157d220734ac686ae268a54df3adfe57b8618d15b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:48:37Z), 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/HUA612201172.