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 0x61d2ad8658b71b2b793a2468d42e24c8b680e5ef6f60d20503081213a624dbcc. Chain 2 (Bitcoin): anchored in block 953975 (2026-06-16T16:53:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b740ef0-c990-4ed9-b4b0-90dd54086991.json and https://artists.proofprofile.net/proofs/artist/2b740ef0-c990-4ed9-b4b0-90dd54086991.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 0x4bdcc9ac82485c6b568ef91c4d08ca2f345e083af7642d33f96e7ecd90c3afe1. 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/FR2X41801576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb05a583fa71d6a5989b48ca4cd8bf4626dd6e4bbc1ee064a360748c93216357. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/AUBEC1890015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdcc9ac82485c6b568ef91c4d08ca2f345e083af7642d33f96e7ecd90c3afe1. 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/FR2X41801576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1410516158a521e94a97b4060b213a1ae66aadacce3f7f71af086db8e6d8d9. 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/UST8K1788713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2ef3951a36fb2cf32b6926f404a94faef488da40b0b097e4e5975684446c67. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM4DW1769997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8535c1160a13770f9308c17bdc88c4b25f75c61902e25832f5965f320656ea. 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/UST8K1684821.
Intellectual Property #So12: 20th Anniversary
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c24980fb0ca0de4c601676f67fbe4c9f131e10dca6101acd3b74b52e25be44a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZ46Z1600301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb789460dd5f7b9cb19af3953c3a8ce55cb88f78111d35eed5d79da004a4470. 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/QZ46Z1600302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc996f7cff9d7d65b3c228e922ff6af63121eab9be3f421d0da8175e0e7e26f8f. 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/QZ46Z1600303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea845c91c7a219b1e297c05eddf8372d69f21a58f5d8f2fbea12599883abbe35. 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/QZ46Z1600304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d3fed707cf6a7c858be4ac4c071207000e360751d6f2cfd4da21bccdb16b91. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZ46Z1600305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46719e50b378abd3719356affe6755f8c1ab9dc758157ea829047028738a1a4. 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/QZ46Z1600306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a1ec17569364ec09571b02ecd8fdc8575c02486044e434bbe8bb975a0180e3. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZ46Z1600307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afa738b9a1245b469ad4a695eb0b919f8c2fbd10fc0deb1f5e6049edd8b105f. 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/QZ46Z1600309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44f3f2375fa9158126b2a1d64da0bfdcd546302d60fb882364b8783d4c2a294. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZ46Z1600310.
Paypal (feat. General Steele & Sean Price)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf198f46b7169ba948e766fb8842ae85ec63fb0441c92ab11e9d69fe4fba35ae7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZ46Z1600312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe138f0cbdecc95e2ff63fb2afecfbc92c8438aeaac19821e108f59248a48bd. 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/QZ46Z1600313.
Downward Spiral (feat. Bumpy Knuckles & Onyx)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc583ad8d6ebb964dd56c684300d606b1a656343ec7f4d66f19d1f753b29c3736. 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/QZ46Z1600314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e537bdbf23c9745dd56c1436b5273b21b6238d3eeaeb42e5b46a537b542dd9. 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/QZ46Z1600315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dad10193b456864a5d046e3793e1bbe24cb0784a30434f5fed9055efab8a77d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZ46Z1600317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf3cf5837cc8bb09f623fe8bf6b86556e5bb53edc76984c72b6ca9ccce19268. 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/QZ46Z1600318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749ef0c292100a8a144503f9c1d5ad13898d3be91a80b991fd976a42074c7179. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ46Z1600319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872c93219f037fdcaf5ec4263c476be36f0714ce9280636318b3d14e4599706d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZ46Z1600321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f38b44446901a8ad6b3a96596eb4fa364b0abf45f5f83d7f1c9eb80f890315. 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/QZ46Z1600325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c4acd27fb142d8ee8cdca698bb529affd098ed8c9518c858f40d0ecd50a1cb. 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/QZ46Z1600326.