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 0xe56901137d6f0558e6814e5c462bfa8aa9b2e912a651594d71481a6755b28e35. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aeb6f193-e28f-4eb4-b52c-934fa2bbb14d.json and https://artists.proofprofile.net/proofs/artist/aeb6f193-e28f-4eb4-b52c-934fa2bbb14d.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 0xcb34dc8edfb3f222ceb70e5e2e8dbc5a1cde744f2a6bd3bfcd5c0fc8a747a731. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/IL5842341135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1449e8032a061e429ec49705511259088a81051d05b707be0bb617851621ec. 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/IL5842341136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb214d2279406b929ef5141c1af77cd0493b86f5f77c23c990c1780715303dbb4. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/IL5842341137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29df22db586ab409fe0b8a7612542815be9d4c9d444b88cc32c0fe67eac0256c. 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/IL5842341138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6782dbb2c0334a9944b82e8b2ea02d16c7bb52eba44cae4569cb58aab72768d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/IL5842341139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ca47090009322e7b14f2b79661c178ceb6aebe3b67975062df92e39edd5294. 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/IL5842341140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfd6528d45ab88f7eb517e2dd4f6c456326b1b07537e9764273d6982cb7e4a4. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/IL5842445815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dd12e27162031d4ab46627f258adacf6141f0492f30e0858e6f8e446209d59. 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/IL5842341091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ee1213451c546889662ff8fc959e3f80d2ad2c061af4b1ffdc514845eee95d. 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/IL5842446932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5e970d93ebfcd64ebd2a79f70b90664458927f03d3f92e8515c2f6e8d3a311. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/IL5842550563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929f79457723960fb456d7a1b202f28cd43ffaf256e1efb159a611c76b69850c. 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/IL5842550564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff853448a517b697ff39257100c533bc5a07b28bdc86b6b838c4d93700c113cb. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/IL5842550566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e07ee9b39ac590ead2401ae92bc553ca826f853903f444a53309213032d786. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/IL5842550567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ba665aede58f5594e94296cac0c71a30696ef559f51e664cd5c602cb48dc8c. 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/IL5842550568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044612a02c0f8631fa1e50f660f9411a5dfc2958028ce29317f752dc0b13405d. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/IL5842550569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d7f544b8ce0eed375194bcfe0637cfe3b70256f1967035120ee188226b3630. 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/IL6192000876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbae5a8c5805a130c1c81e221d17fbc4a63a5e091c9aa21e381404423f5c813. 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/IL6192000889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552902b294667247ff79db1bbac3e84def84148b6d12c514f8651e50c24aab15. 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/IL6192000901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ecbb9c22d79dc07bdf30ef18885f27bc94e57bc715772de18b00520b1bcb26. 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/IL6190900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed0e0e0150c61c401587a91994d97c0df897c338df9a2b9cf64b550cd3eb10d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/IL6190900117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7eca746f58c66939d820e04f0ef595571ae243e85fe581e20aef8f7b7b2b872. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/IL5842448475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306dd82096cfafc3565a1c948d524a18b507fc6685858f5d607027a6ea2f07d3. 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/IL6191200337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cd82824f682c55d4bd7f502486be2dbc3aebe1f29b06660c6b029e9b134d8b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/IL6191200338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87ce0bd17e166391ec3f9d3ffa7f95ae18739ae534ac138affb90c15f6435cb. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/IL6191200340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11307c70151479b9c29573ed5033656b1a77bc7e68ecf32f85c987d672b8bf4. 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/IL6191200333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e38537649afc9f554334a729a77205c373afeae81269269d9249a30c13fc3f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/IL5842449316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b9ed0dbe5b2cd2cde2fa434c06e14c3fd6197f2a5e658d56d1c9de725a1398. 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/IL5842449317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8e67aae6e582422fe872f80629befa94162de8ac03ef71a3cb57cc2aff7549. 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/IL5842449318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0862a8c8013cfd9ed26c2923db2e3590327b6a18d3534edfae883c1f050d1b. 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/IL5842449319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89aab7a0edf5aec3015d046e8f3adb6497a6aa4088e63269f67615e8c037191. 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/IL5842449320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfb4e413df9e38a9ad1238ebcaaf030684a04b589ff7bfc902377335d252cfc. 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/IL5842449321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382caec45bf639cab1896ed711181eb067126f5c38c23a6e4146e05f807a8704. 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/IL5842448872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2458eef5102ef43381e30ec2b9b9e455536fcf3dc504ab8217f660d2c51518. 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/IL5842449323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bc39b08f0c8044d8708fc632123a36ef3c568702a7c7f42a28df69008fb982. 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/IL5842449324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edcaa531401a9f226744c06d835f6e0435994e8b39b535ca5a2359725dcf93c. 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/IL5842449325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cfdca642bc13d3e08f616e2d5c04d3a1bdbd61f58009c22c668fb7fa44349f. 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/IL5842449326.