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 0xe14ade208de3a2b0d089d72eba18c221797c300008edf8134ac4c2096d1f2ceb. 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/b3a3e801-92d9-4612-b550-cec2f5122efb.json and https://artists.proofprofile.net/proofs/artist/b3a3e801-92d9-4612-b550-cec2f5122efb.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 0xaca10992b573ea9fcff71b8ed325250b5af0f94c4148d5014ce77e7a90f393c0. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USLD91769202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f35094cecc97c908ae036dc2b0bd0396bd17fdb1797f3515197c2187203907b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USLD91769205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c7eff28e7ba45c96b661b31628fa0ef2cbbeb4c9155bb9d56d3b86702f7048. 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/USLD91769190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e051722ee907e29d7d001d103c2e538f6e3bd007dab3592297c89f2daac0908. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USLD91769194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600f76ff9aeca4a4c7225562c715c0b4a91ad0b858b9f84807465704fe15e13a. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/USLD91769195.
Ballad Of The Brutes (feat. Cla'ence Jo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3d90ff0482f58a24ccf44285ec9310795ebd75062ea679a43d923c96dc565e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USLD91769196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d823c588ae9ec7f95784ab7310c3d119c337ac1c075764e73a5ae4008116aff. 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/USLD91769198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c74fa781a2ab73e0b3f9500a532a13829e7900581389e1f0fcca9a8225edc66. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/USLD91769199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bede20cca206e99168f1164c88802da46790440536bff64dea110f2d79ca03. 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/USLD91769200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa8228d5ee533dc1a0288ae1e343d482c8b777ae17efbaecd9a2d573d02edb1. 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/USLD91769201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca10992b573ea9fcff71b8ed325250b5af0f94c4148d5014ce77e7a90f393c0. 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/USLD91769202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc371bd3b3852523ffeb75821fb67150f58941ecfb57e79f090d13d9693a62ea1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USLD91769203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f35094cecc97c908ae036dc2b0bd0396bd17fdb1797f3515197c2187203907b. 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/USLD91769205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8464e219b37d7ff0b21fadfc8ef05ac97a530db2c539d5283ddf1bf8469c6b7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USLD91769206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3d90ff0482f58a24ccf44285ec9310795ebd75062ea679a43d923c96dc565e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USLD91769196.