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 0xbe7c70cab91a5e67a71716cbe52a2c2e3d8f9410d5a3cff039ac56b22e059b60. 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/a66cc33c-de59-4a07-b59d-150ef07f097e.json and https://artists.proofprofile.net/proofs/artist/a66cc33c-de59-4a07-b59d-150ef07f097e.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 0x839508e66e566d630b0a8c446b18d77eb761fec8ab73264ec8ba119140bb0847. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QM6MZ2203675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e58eae3bd56289d8438b2ea365bf8ccd833af8dae441bc56c117e9da4812db. 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/QMDA72239942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682324bbf2c89faad87089e76f49364f1bfe3e5bbbe69cd3c532d82cf170216d. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GX8KD2301231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b037eefac2d0497bf3a08b0cc64093b10d74f83755f706d5505b79c8b0d34bc. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMFME2313478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32e8f56e362b4bb4b1784ac75ba1d9d9d800deb27ce0850a93f031e81937e03. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX5MX2311971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc662115e84a22ea47fa58f64eecbc47804f4af6af916949153d4180055fadc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEA622400537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bbb5e6dbde8ffc77505dd907b1a6c0c41efd50ddec7d460edcf631a6e5e3a9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX762467982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d0d25ddf43b63d9d4395d42c06c5ba12de51ed3d4d0bf086b2f7087c8c4d1c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TX2110230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf53eb20643b864b4466664f37fd7cfaad18c00a1deb7194f1dce3d091d3fff. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SEYOK2006650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518059b7e2c9fb43a9029144c56c13bebadc41b539e46899c1352353fd1644fd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6N22288723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee0443b1ef1478b6467d73969f3f13e5cf5630167893ea7d5fad2e1419ccdec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEPI82326190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0e74338d9cccef482c238799cf65a978fe7f9c2bfa89f3d8323c01e2e9e79e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMFME2165376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3375a369b7411c61c60a691f4a8f1a5dc6acfb42d0ef8f833e7a69e8df22c5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM4TX2196290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431886072ff3dd8e248d924acee818b802272c459591cae948a1e5c8bc2029eb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCAZH2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68eea4675bac88d105bc3b94800678f229b004985b9e2aabd038ec91cf66bfed. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEE862300554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3055a6e9689760570fd38f9cf3d96348a0f08edd3f252806ac60607638b4b5a4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX452403962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb585f2d1285631a439a0dc01255be87d06c5e45bac90e27acb897f2164953f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL8NY2400181.