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 0xcf0c46f3dc2ade4a580d5db68ce2bab0234ed0c78b1461442deea69faabea039. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f48a2e12-cf75-4b03-a216-405e4ea17540.json and https://artists.proofprofile.net/proofs/artist/f48a2e12-cf75-4b03-a216-405e4ea17540.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 0x7a30d794dc591f0176cca08db22e7636248f9e17c82251712228afac4b9c7eec. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCACF1566628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb642dcde457b59fea2a0ea86ecc6829536483c7182bbc94b76bb80a4dc58264. 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/TCACF1566631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea76b0abb47b739245a7af472cc8147ebe98cd2c5464fb2ffd4f92d8564ae55. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/TCACF1566634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579f2a01b6195cd301bc104d17b8c793abef1e82444f32c4c566a601e17536ef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCACF1566635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3327dbffa167219720fe1ea91e5f1a8dea6147b31a05d0c98f0866d63780e226. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCACF1566639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ead65df6ad490bb0bc0e44b57e5816e09a503d64177789cb7066289d74be71. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCACF1566643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa187f2d1690eb23c05a61b98266456ea176949e40133ca72935686178eb6b59a. 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/TCACF1581815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29df3c9235223bb10468b93db7ff1866443d07e307c317c9f080bfc0c5c7de2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCACF1581821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729a5975b343327a31c941490805b4baa6d93c92d221bca135d22b635174e8ae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCACR1615527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbd35a2edec09e0ac7d01a8cb4b7f17a3f4b54c92a37939df525682f9205709. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCACR1615531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0854595aa1c14ea6c65774a17fca1978efbe16c1f8015aa173bd7de490f42d8c. 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/TCACR1617663.
Daydream of a Killing (feat. Funkoars & Vents)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16da271e588f94f4a28d8a12c0627fe9aa8c7b05b1058ef1614907ff79385a37. 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/TCACR1617665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6ffdcb590e6e8f1e5b28a3bc59ce919dd489855068b392e665ef9120c6fa6d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TCACR1627524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ef4725971d3242a44fd9c472752780d6970995db20f51596f6f26e318275fa. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCACR1627526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469287e2b055505ba1e8cdb5c8f9f8b29ea44a56cc3a6ff5312b972211b90fb1. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TCACR1627527.
Battle Hymn of the New Republic (feat. Ciecmate & Maggot Mouf)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa2af6e1d8159ab4a4f5d06206604b38d286eca9e8801762749767fba69a8bc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCACR1627528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428b1678d7ac732959bc103f8eb98be017a056e34ba610dfca6b221b4c4c21b9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCACR1627531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0528ae214df9305a695d979ab0f338c6aff622d3c95a00f0efec43d4938a2dcb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCACR1627533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65f78494cf5357566027a0bbfb891b87a4949cc369e1e6d081e51e0ac13b138. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCACR1627535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e5381b3af688c23a7b4c92d34124f79689db74e41e08eeb2be50f1b46cc325. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCACR1627537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbe66acba3082e3b4073b7c81c76803f1944d13addbf4beada5d91b656a911d. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/TCACR1627538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d8cf46528465e9af8b91c88076a5fda9ec975434a3e7d2d1923fe5041085e3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/UST8K1620927.