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 0xfee57a214abf90ec8e11b414b2eaba5b1d73945c46caab3d32ba494bf5a37155. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/074ce1e5-ec55-4f27-a36a-b525e22cbe22.json and https://artists.proofprofile.net/proofs/artist/074ce1e5-ec55-4f27-a36a-b525e22cbe22.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 0xbb3221ceda7fdf291548683b9455c0d3b36f1281f9208086a10074bda75a728c. 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/KRA491601066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500b32cfb29d9154236c0b705a777452f398cdf84fbdf6c7e376726dd7e78d2a. 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/KRA491601067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bc1febf7b6bf7e15dd74d5160dcd7a69faceb31563c280e3a4f7452f4626d2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/KRA491601068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea68829d96ae784d537cd422393cb6fff08e009297e9517d68666a3c88582405. 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/KRA491601069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65998db106bae375e66103a9b9c921405f3acacc4af56090b6f726dacc4a09ec. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/KRA491601070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ea10f0c3c112f546769faec261a332207e7166f3979c64b7561b358fe44083. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/KRA491601071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27b9f3f42393de330c7b38868fa85c4bd29f79a424f25db03256bb13071c297. 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/KRA491601072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a87800f8e1193b7b09bfe4db0420ba45bba658e5d71dbdee7543cda8be74146. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/KRA491601073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd141f83fcdaca1b4bb6035a35e9cf08e100f7cd55877d60f22e215a1b6a0a2. 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/KRMIM1903454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a86ece536ae96fa28e1416c6235bfbf02aefa40470658b97168bcd3a70f55fa. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/KRNAR1803460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba21a2b92ff0d1f14528ce7db014a11d60abb09b4df64b14653aa94f098f56f6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/KRNAR1803461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5130c71ab536c1683d8d2ae6fd1cef5a686f0c206a5bbd97387c3350d9f6feb. 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/KRNAR1803462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aee1c863fbcdc73c4e0245079e010ab5136954492564b4031ff895c0decf622. 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/KRNAR1803463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b3e97c07771ee76e6b7b985514dba779c89adcd4f1181ea684d58c79c26035. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/KRNAR1803464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b45a8677ef8ef27076e7fcd4e485361f0a5421d3e9e32b9c8ff8d7b0a485427. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/KRA381901549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85cfa0c58c3c0004d7cdfea2cf507f1d935b5f9bdcba7b708b13adf422eba03. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/KRA381901550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bd2145fb66b4fa901b72d81a550822fab09f23db97e405eec821bde49d7176. 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/KRA381901551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49dcf3c32d06be50e8a0561866e8df25548caa07eeda5ddd11180c78a90d837. 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/KRA381901552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e68cec55ccc4587f45bdccb0422bb1feae26bafa405c2d5809ee6954080bc20. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/KRA381901553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2250bfd5a4cf9e5cdcfd5354393dc1739f7127461e5b050b593eb48c7f9cd4c5. 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/KRA381901554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3f417f98fc7bdc7a7bb18c5aafd3d4f1056f63f8db4982ea5c55ad2ce641e8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/KRMIM2461484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46708951c18c944060446c219e488b51ef2ccbca19a2f0cfd350a5fd94b17495. 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/KSA002100378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cba1d44b427408e36b4792eb2e8d56966e2903cfe07eb4b2a3aed40fdb3e548. 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/QZF452004849.
B on my mind (Feat. Leellamarz, HunnyHunna)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c438e56439207707da5a2abe75569c7722d6c05cb4d9fcb2c64be42dc39df3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZF452004850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9ae9481d3e8d7c16e6310e91ad44af629f7a4b32bb644851506b566dc64b4a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/KSA002101119.