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 0x1efd84e59ca1225ee8b549ec0711b5aacac7910961da1dd634b98d6243557cf5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60d24824-c161-4336-9e47-d14ac7ba6604.json and https://artists.proofprofile.net/proofs/artist/60d24824-c161-4336-9e47-d14ac7ba6604.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 0xda0410789ed64f60a7dbffa37dba310c2d5660dc2411df3603d0909b13634762. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/COC011228671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87abd83008d473a29e727f24a7462b2ab48c489c4c05c55937a2a851050b540f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:44Z), 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/COC011228672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e238382fc5d413477a7e44fcb3be8025ce4e5548b31bf989b8db2663df4f9b. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/COC011228675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ac0d496e451566ea221e574fdce363fcb900e8378bc424e283ee020e564ecb. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:53:40Z), 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/QZMR82501172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ba1b1cd6e728ea1d94dcb74533b193bfc3615d9ab683b8d57ce3dc75a5a8de. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMR82501174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c36e89f6f1c26521b46fe7c7e82780332da2c5273f99a6a2a33f5cd04ea8350. 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/QZMR82501175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76849fe27268893973b0c8c7b381b513d9a3db5ac2f8b717318cdb77b3e8435c. 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/QZMR82501176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc5643810757eb70cf6ef2ad0d72354f549a679c4789a2941e439df22324be6. 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/QZMR82501177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e48634e985acd9ee53285033ffaf8a39f86733f59f842bf59b1098b2067d80. 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/QZMR82501178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66dc3416542036d255ae71be1547780b07e3cf3fe93ee210deaf57eac0fe6cab. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMR82501180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131f8bf06e5e8075bc2879c7e667c9c686c4888965769f94555c1c20d6c308d0. 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/QZMR82501181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc4e684192c780c80da470ef7444ff10e1fd0ab1531c7e0310af077e0518c74. 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/QZMR82501182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eaf62a7859e60c3edbfb044afcd06d82f5b45959d639ece9cfe63b3f3adde1. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZMR82501183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286d4b6f4f6507ace87739eb2947592f1c9f4262e72bf4c31dba3a4e3f7d738e. 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/QZMR82501184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b28197332a9342be2da8ea7af36efe142a0f2e1d52d5a240df96f7a6b8a4e33. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMR82501185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a79abb03d3adcb3ff4dac0f07aaa883d17c5f5e9fe8c12b94e1091b5121464. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZMR82501186.