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 0xa8f1e28338c0ce0dc4644f6935c7ffab0488008e9e448470fa7c62501283e71d. 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/3e4f680f-12a1-42bc-997a-3645018c3326.json and https://artists.proofprofile.net/proofs/artist/3e4f680f-12a1-42bc-997a-3645018c3326.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 0x9dd519a41f0f9024964ac1af5d86b845694ad45a5cc869cd1e03acefe2324e5e. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/BRC1G0400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a45e264e5eae8b06c6f4fae8ab5a6acda2a0ad6b64c1c8ada6a12af0df278e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BRC1G0400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc31fd4cd71f670df3db94a60d565e5587c271fb8fd6c2ff373d79a172ef48d1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BRC1G0400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ca38de8161233d3b8d563963dbb3e9b07512d0bdcf86c49ea44d871060c9a2. 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/BRC1G0400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dd4d4cf2c47da273cd08272bcdeaeb884159923b43e90dbef37921f434012a. 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/BRC1G0400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4770927b1bb696a6995ac0d13552a1c0fe0f2b1796e08d9152257d7a398dd4fa. 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/BRC1G0400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71adb5a00a91e0bac9d27c4305243ac30e00d2b1c602716513f0bf11b068311. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BRC1G0400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408ee7b30f3775d1f84ec3b15d7b66f4dd90011094102b5ed2e110418c820381. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BRC1G0400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e8224b7eed47daee3d880ed6ddb9d1c394e2411c7374bd0ce178abd171e05b. 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/BRC1G0400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f94a6fb4b6f99896b09e9f549df209e413a8a48794d7fcfa65d0b87ad761e97. 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/BRC1G0400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872b22193f1f08c7b15ebecdc91f0faf129f9d2f781016d67477bc8f8449a120. 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/BRC1G0400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7bac1f556cdb53b252ddb27a4b6095e85a6484cf3eccaae0c404e5099628ba. 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/BRC1G0400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38b21beb26a48ea37b98556adf3b320d9d5b13585f5edd450277a674948cd50. 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/BRC1G0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9af9e4bb1f2839d8e1190eb4c785fa1473385a446b53f68e68a04315f7c4fb. 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/BRC1G0700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d71504b348c5e401c178f06b3730165b6ccfdc11523e3df5b5541943f9cc480. 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/BRC1G0700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d4b0f9898ec52eb4ba0631a75a474fe4a1854cc5a8ea3474c03ed433525f55. 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/BRC1G0700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a41f64becc54f158886d5c1f77f1add178c03eaea343af7a32b6fd38493ed6. 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/BRC1G0700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eabf4a7dd1312abf677afd019cc7320846906ea2683d7135763b9e09301a4da. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BRC1G0700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b04ee5593db323b9837b4b6c71cc5892bdc3cc7ad9cf53ec45b77fca97ee77b. 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/BRC1G0700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9894ea88f35d5ffec8e957d7025ceff3902fce0e7b078da3160c89901a61daef. 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/BRC1G0700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeca84a6cecddfa9bab1c1c378b3cb5c49f8436b61b821a9b98b52b115f53541. 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/BRC1G0700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b62d20b7772d215f491e68b07c8e08ea801c297ebc446074f966149a2594b6. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BRC1G0700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d9ba413a5a7c6c20bc10683d226b03eaa59aab6b54a4713b8be32800087ab3. 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/BRC1G0700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af28d8c18862613e2b41ec4cefb1dc417ca1853f820df1999a1377fd34631aa. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/BRC1G0700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f58511771b316c86b1945ecc221ca71e6193d2900d3a4f08acb8d2e7b1148ee. 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/BRC1G0700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9e8a65ba2ff2e3e2ae7c92da7961be4e6b5ee069a3db0a0a19a8ad376122b8. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/BRC1G0700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684cd2c6536a43513d3f76a5a69608cb3b5ffb37ad35d337680faa3704734d0e. 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/BRC1G0700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3434d7d3498c1079c788b9927e972824edabe0f2ad2f2a5eb522d9a4828aad4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRC1G0700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb660d22eabce7ab0b38b21654c3ad82b65ea998e5153186ce3cfa0972834a1b3. 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/BRC1G0700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d13dbba460e3957485779f757f8304f2cd41591889f2d21e79e7f217d95328. 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/BRC1G0700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385a1124323d1081bd0653d2e4dac29fc90ed5c05ac1b86e7cce526734c2c79f. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/BRC1G0700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8febfa0cc196f314ec2bf69782f2bde9755e4ccc5b4c20e25390db8aaa291f. 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/BRC1G0700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a75256e48bc2fd90f9b75263834c08e7e4f4c91c88b129b7dcbb021f6af4f51. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/BRC1G0700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86539589d3da4add9fcc38fbeb9e965f457d729b5d1ad9b7df6c72e3864a3f0b. 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/BRC1G0700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1c74d4edbc3e1688b6867cacc8546cdeb1781efcef9af815ef2679cd5d08c7. 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/BRC1G0700041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc900a439ffd4ae7815d35f54a3604a3982051296db32804872788a47f9609367. 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/BRC1G0700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2799786814e1d393e3a19a735b6ddb374258e61629efd8bd2f173ef83af0492. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/BRC1G0700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b611f21d7949a421117c125fce7d6e2f6b5e135c1e42ec38d76553845567c2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BRC1G0700031.