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 0xa1eb18324b57bf0c40a00b2402c3de0a2456e3b89965140e3046444ea28ea015. 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/7f44af14-8bf7-48e8-978c-08865057e518.json and https://artists.proofprofile.net/proofs/artist/7f44af14-8bf7-48e8-978c-08865057e518.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 0xda9da2b6896d93791632ca0c2126ae452d01f68bf4064ee181597327088316fb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA82304253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87970f14d2b75a4299668a1aa440bdcde539c7d65788d2cd9adcf27db53460e2. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZES52313633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da27f3fbe8cb049eb43c9ba16df190c73360456a9c6bb810d9b6e84fe3a3afa. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES52312106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9ce3112dafc0522a8d741a4f22fce1fb96edbb534c18422acb6c51e475317e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA82304520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512acc60dd9c6ff019c5fc46ee2733918d998f0613a72addb9191c007181fdd2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDA82304069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6fdd44ce99b2963ba2102768aa5b8f191d986536618446ad2a7ece013ec510. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZMEQ2265940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3a4aca5a3ab22cd486bad20281d1f458da85ac547e1f235a38087d25697f62. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZK6J2062407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2089e74e13c67eb12d8ec3b90feafe55bfe1df6e8534220255cad7c317cadab6. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZK6J2062409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6080d5330b10b5c5b549d19b6e2ab18fea7940c900a3148420a8dbafb3b7cf7e. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZK6J2062413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1b455584c91250b0a09e7f74f2216b2cf1dc2c345ae2cb8de3c1f7b8ff98bd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMEQ2265958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ec10c438a9294db253f2f45a7ec72482db37620c6ee0628dec3abf7144847b. 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/QZMEQ2267675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147bd075ebf8f900d6d26adc5d849299dc85545e8853fb93cfa3488a0badce3f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:53:22Z), 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/QZMEQ2265938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66416e48708fa5c724dc8cdf52828f1b042c39d51e33852877926ff3c689b96. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEQ2265936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be1b70bffa58f4d765bc0e0aa1a7b3363f2e4de4d555029d85e8f1aa200596b. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZMEQ2265941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830e797aa93624e8f69c64c84fe2342a89659b46f6b83a1640eac4abe2d91a9f. 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/QZHN52330704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c9a4823aabdeafa9abaa3aa04aefccc696d81287b53898a59c4ffe53ef232b. 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/QZHN52330706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4568322631ef642ff0a929e429f1a96d83b569f286ee32baa5b62650e8a71ddb. 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/QZHN52330709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2982b8aa40ea19708ccf51a104e103e7ca8795b2b218c06d65c92cc7317830c2. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZHN52330711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcfb676d1d17476912c32e174943aef003bfb5453bdbb94839638e05f793176. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:03:14Z), 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/QZHN52330713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dc36a853f25a4ef96a440c4a1079143e2ba85af76931deb76ae1349bfedec7. 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/QZPJ32362680.