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 0xd7779058ce974caacfecbf0ec396330e02ba378881812819361bd31e5dc478c0. 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/55f12f6d-616a-47e1-afea-a06157123916.json and https://artists.proofprofile.net/proofs/artist/55f12f6d-616a-47e1-afea-a06157123916.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 0xcbdfcb1bc17cb1e7c2932e811f6ec6ab41f944a3d639429f923a344df33412c0. 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/GBSMU9600145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5870aa1cf37292a39f17293d079ef94370d2cb0044911e4ff6b455f35c1bfe57. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:10:40Z), 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/GBSMU9600147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639092739635809aab7cb5d39ab3fad7fd82a8161e88caa337cb4842dda645d9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:38:59Z), 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/GBSMU9600148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae418a30487c99c96039e5d845f02e104c1e76191990ba5f870cd4bed13a506. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/GBSMU9600149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc2ccdbef70c6453768fd73c605edd5cf4ab477483e428446f44834c440efdc. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GBSMU9600152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852fb384e36978c7c86af9304d05b651599c14ca28b7d453f7f5fc9abf8ae407. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX5MY2117524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8180cf216c90ccd70bf74ba47f6c33df61bbcb8262b2531983be87777d24c9bd. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/GX5MY2117527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf1b55a9145cb24fba17bb8298fb4d4e3c49f8447dbdf1d5461a03919e985d0. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/GX5MY2117530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fd10a33810aec8c1f07d14bdff080980f98dd352daa6ca0083c52b485c3e7d. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/GX5MX2228583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ec41bacfa908876b400ca29e47bb10a3a5297b1d6121bbf3357672b2614409. 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/GX89G2268107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe756ef6cee5035967bb093deca91cdf72f7ba56ed5a8df29732c8a5b6a39efce. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GX3HH2347676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64896fb083b30cca0c454916c705dcb985f54915f76c16e55f0d52509f8255f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX5MY2329998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1890266d37878119ec6cc37055bfabe120a1b23d1a7d92aae25dd1c0db2c7189. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX8KD2527158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35bf495273b53c4db2fab53025cf0b302227663b8e38be9d4f54186710bb694. 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/GX8KD2578408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fba053a32485a57518ab2ccc1f6d5332b404e17302d6179dd3a54f64049a5a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GX8KD2510514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1cd57cbf5a3294e4e5f86893c47a6888b20b6737295812808598bc38ad5d7d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GX8KD2509165.