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 0x7e9e881967a0535dd62c21a273732283121c4e32415eefbc6a763eed916ec668. 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/12b36f53-6f97-4c24-94fe-e33ebc80d592.json and https://artists.proofprofile.net/proofs/artist/12b36f53-6f97-4c24-94fe-e33ebc80d592.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 0x9b127beccf709cf849cfb538186f70cc0d7cfcab32e51aec59fabc14bd18f0c4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6G2403568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa304421f180fe7c6a5962149ea069e7624ac25d34f5c1c259f7850dcd8a544b2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6G2403558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0234c702eb7196ce8588a0ee780330d14f4cfd4b83225b219ea42d13fc94c5. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6G2403570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98296423741c1631f74fb4dcabc99d52abb7fa142db82bf9e1f72b86d423097a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6G2403564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02833aa328f451cf49fe6aff3426cfd278c7c255db4ba58a4f6dd968869626ea. 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/QZNWX2428538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf79db76524b4c47793fe3c60a72a272b0ee1ea716b7fca53712f64f01d9034c. 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/QZK6G2403576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec883a30287e1f0016350901fc2d9aedd30080ccbb34ffaf2059f380ee8f8de0. 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/QZK6G2403573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db64b6e2f419807db0926978b20a28804c74016cc34466558ac35bbd9204c80. 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/QZK6G2403574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096168b785531a8a557beffe4ddd43f5deb4b46399a91e510b30ac325ca41d96. 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/QZK6G2403590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeff824edfbd23cb2405bac8826ae1b075bba6c41e0cf6857aa1032dedbea254. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMEP2432237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f964b55b1e336ce93754838f0786682351433a94bd836dc131a1b1dc6a5174. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZMEP2432239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c63bb074221f96ae206dc5d186ad3fd0d081e69cd1444c380c37fbdfddd56f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZMEQ2463607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdcf3dfa5661053c765ab3526c47c6fe40decc2129f0109937f409bddd52e24. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZMEQ2463609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01355eb6668a83f181cced46dc750d7029bafba342b076c852a0dc8f9c82dfb4. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZMEQ2463605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1fc57f6a20423c91addd65703d39193261efa068fcd21af79f14b4b351d5dc. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZMEQ2463606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc508857326bb4c28295d6527624866e9bd3a935590743c3c2d272cf7075461a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMEQ2463604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8237d542eaa2a79bc581bcb162c7d1f1b92f2e729fd2f18e064c7af15184a94b. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZMEQ2463617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90819236175214313b88fa9ca84781d1f8cb6e0e286106abd9baa603ee62ab92. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZMEQ2463614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe208a9af8b5cebbc8086ae9ad72ca516a146077f1d419cc39c97f9b2a67e51. 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/QZMEQ2463610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c20061e3b383f8792aca24f7127d01c451ff5015ae25e4453369cdb25ad753. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6H2462074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed622c6bbc196624fa2f290f93fd7100416bdfad84c08c62f3779d571f6f6f6. 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/QZNWY2565258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9ab4eec3e9a1c7036136c26c1fca6c8670a2981a3407e54c083f83a68dc1d8. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZTAU2565478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74978231ed2fa40269de56d078fcb0f22a404ede371e29867ad2185649e74289. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTAU2577679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0857f0c866c674a35943480e63b7813e5680b13875e60902ab4e9aeaffd4a1bd. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTAU2561378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743765317c413ea4ca06890e6d75ebbfb85c27640b5ea5bdddd2c026145725ef. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAU2567311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131a89674f14d200bcf1f0cb883e3b1b67a75ad367a2221f3643b0c2147bb3f7. 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/QZTAU2561329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca460a941e0c4561ac0b2978c7e4f135ef3467973e9e15de6ae1c2b932c98ddc. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZTAU2567315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab27fda3772fe9e707013594b6fffcdc5f3c9858c422503feeb9f4952272036. 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/QZTAW2503708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ceafcb2a5cb1aee386c3bc1d95cbbf5830f6142352a9ce374da29561c6e5751. 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/QZTAW2503724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9744070f5b75c81bcb0918d4bdc9b7255ce288544af7493b22970dc4a1bd48f2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZTAW2503614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654837d7e9267d6029e9521b4650d7192d7ce7a5b973ede91ee7d940263628a4. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTAW2500886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84373d205539056f341ccde3ae1b87c62ec8b23fd134c6122acc2a6a772f3b35. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZTAW2503577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f8ca0c22af1318b0dc417e45bb355afc329a2cd34b21e5ba06aef7212e1718. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAW2503667.