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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 0xd101d88741805107225d61c8a6954d5c11ae2cbef4c14938b4c4d9b7c5c58de2. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c31cdf58-e4fb-4872-a931-7088bd1a3477.json and https://artists.proofprofile.net/proofs/artist/c31cdf58-e4fb-4872-a931-7088bd1a3477.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 0x25990f30610a2da5c44038e5e12de7ba0512097db2764d451c8a7c237d932145. 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/JPH961200264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1f284e5f48fa5d395e476f4c3c1260355e8489355447783d44ad8594114e59. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBKQU1791083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc863b0e58a607072b09e53558722bbc04ce3b6887665f658b870eebfc250dd. 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/US57M1598601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadce506376be8ea7334cbd40620d273f17389192419614e5649ba9e691ff56f1. 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/US57M1598602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da5bbb49999bd1998ccc06f6efcfb89f21c0c1814a9ca75097ca07fe0267951. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/US57M1598603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ce61bd72bb5378f1d95cdc4d275d1442891a7840061bdd55e2512372c50da7. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/US57M1598604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88551cc486ae6a1ce97d614f8a22c8b936dd961d53a98e5f94682841b1518db. 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/US57M1598605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da6882032bda26bb18ed2623c9ac4dd95d71594dcb1d8e6ffacf538ab64de0e. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/US57M1598606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abc8a6a69559d98d512cd3917f374c837830ecbcf9906c9ad5353877c7079dd. 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/US57M1598607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57edc6965a682d96bdee23698884642657481a6bd0e1f2c235c51a8aa5c41ff6. 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/US57M1598608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4e0d5e4bbef4a3908a90c1e888b40504d0590746be40bdbb18d7d8e2df493a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/US57M1598609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a59a16e374081f2eada7233d30dca4b000cdafcc2714aa3a7d9371149e03545. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/US57M1598610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934dc4427a333a0a2f486839f9dd478683028b699091af6728d18954b79efda6. 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/US6DR1902663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e78757ae7d5aa24dd272e0dd7a452da666bbf80383b2cb8e92ce22da32f2aa. 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/US6DR1902666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13d70262b1ae7934b8feefe03d8dd274832b192872f83d247cf9e471817a2a4. 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/AU3S11900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694326ab50e6a3e6135418ddba5c804a660b72a595535006ffde4147b0875669. 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/AU3S11900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca0f95aa8017e98cf4b1457b20e820f0cd2ab6f702855b251da2162ff78998a. 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/US83Z1656648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9c936ec4e9b32398ba662402aea5a8010fcde38e1a7dac116c02aa347c7c28. 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/ING602000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ab08d95995df279591ddfeee667bb0f925e7b09f55859db7f3e038bd2f7499. 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/ING602000003.
Ups and Downs - Perfect Stranger Re Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cac1bf4e4ea51d070e2197930dc0db82af637da7eb7656790a88a4b4508077. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/US83Z1914890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f04d6adcf413fa4ff335cc809caa24e8b608a476fe961e81202f285828c8d02. 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/INS2B1300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf483720b208e9d7e583a8b6ae0285a8d6466cc12bc7a4bdc39777e5445ca8200. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/GBLV61702978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa755b274145548c68fbe80dffa29ca5c0ed5367c50331d95dd70b4001f42d584. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/INQ011500033.