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 0x6a83f7a7ddb25f6acb323bea346ce6c2981f6f1ab9e524d46725d4efd98d578f. 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/3e4f4d42-2ec0-4f76-9ba6-4e1a829fcbfa.json and https://artists.proofprofile.net/proofs/artist/3e4f4d42-2ec0-4f76-9ba6-4e1a829fcbfa.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 0xe961cc604fd12f9653512ced6ad57f5281f9b2cd58163d49bf167310fa5d3dc9. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZK6G2276294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efab65a31f3cf5348ffa5f14ccd9ed96198d95c9f45b1292d38c8fd5859829a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/LBA0H1900249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0d3d9db6778419ab0973c8f24a2e0ded0046c77dac9598bb6648a2ca96b5e9. 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/LBA0H1901574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e41a9f007c823c3e9d5289de5d49cd44bac4a1172d79e6d24285097d11a8e4. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/LBA0H2000230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834096840c5b383bf7c80c5f96cdec8b99bbc2c058edf61e095ad2ec4fe0d9fc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/LBA0H2001334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9a5ef5e34cad59b5d53cd86b71a41fe150cff6331db8ee69f965e383e2fa4a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/LBA0H2002744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81b94e7ee8f533c2c5243b89ac0f631150302dcb78c87c9bb2a0dd15c1a55d8. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/LBA0H2003361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6ed6cd8123ca12b1d1df61b769af215ba6d5735c5cfef0787d500cffbf94a0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/LBA0H2006462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92816e1aee5143492bf6559748e630f1c783ee056d7c9465e11a97184ce8127f. 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/LBA0H2006714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aafbff49e71d7e190f9809a5b23fca087f0daeda0fcd56542e5fa65c12237fe. Chain 2 (Bitcoin): anchored in block 957959 (2026-07-14T05:54:20Z), 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/LBA0H2011076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67af6aad6fc10c21381f80ca7402184ec5b13e8c8c0d62a349704a3009360537. 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/LBA0H2011179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c93157da424296b26523ebdae995c4b75c747319147755517254372d631c77. 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/LBA0H2011731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71720dd782f16f42946950146120b0610aca7c2101ebbb9750fba65f4d3b9e1f. 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/LBA0H2012013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b384c9e5ebb8e778734e1410d9a3c31c2ba9bb4829926f904019e05aae045ed. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/LBA0H2012361.