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 0xf9406efb977c35ad93d5b4d0710f827cafb88ca184b38bc98e74c22c239076f2. 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/536cbcb5-718d-4acc-8135-2812ab6a351f.json and https://artists.proofprofile.net/proofs/artist/536cbcb5-718d-4acc-8135-2812ab6a351f.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 0xa1738279271329cdda730ccb5d56a548717e322820ee02ba8ace506e998719c5. 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/DEYT72200547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd15a6d611d23b9d26cdd96e65356c47ce4e2fb5fd2f19655b6ccdd09f4ec73. 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/DEYT72200556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bf8cc5c80b252d5e440703bf70e6cddfdf046fdcc72b30db4e4e67512d8e2d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEYT72100558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4141cae7baaf8593a18d6d6fc3f213ff49c7210cc2585fc0f9795bdc71f7243. 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/DEYT72100486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ffea41fee4fe7a470ebd0887d919252c2303cc8904d39c360c466c76b27437. 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/DEYT72100374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf126cb86ad7709e5bb43a7e30721f56c9a6e6d033ef92b9e4f8c69bfaec7663c. 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/DEYT72100595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9793eb470d91dfdcf4a01bb35c9dc6fb99cfc8ac8c6a80f2886c8c733b202736. 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/DEYT72100510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8658f2bb659b5215283413c573ade6c631c2e6e21bb92750910579ba5e21d117. 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/DEYT72200374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d23e68566efc72a213666602ec02fd4528cd4b29deef57bb9c95b599e4f2361. 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/DEYT72100685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bd34d808a8870d93ee61c0bab1ecab16e0c0f21377dea75f515ea116dbca94. 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/DEYT72200426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281a5998174663e14111422f7f00145cb908b7acac3f8bebedc6d3b2f4abfa36. 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/DEYT72200410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9cf7ec1bdae24c3629c3511fcaa9bca6aa219bae707155aeafac8938bbb619. 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/DEYT72100368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce54382d9442d40141527c2754e3d5ba6d654ea2dd287bd5324891f7c34c3e63. 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/DEYT72400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505b4cc28f2b3a6be7e296b3cd36ae56f5a4344211b5d048c0ade01a7afbb046. 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/DEYT72400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac217ca8bae0737e9b7d85a77a84dc3dfd5e0e5db14766b09a0cde7200a57eb. 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/DEYT72200504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c582fc8740a19eb03dadae3fad8fec939b682ff817c0e2ef6d6d67136637efd. 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/DEYT72200502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb0913262b943680a2d93af20751efcc38733ad23067cc8f5d1bc8494c6b91e. 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/DEYT72400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a3208c15cac7eb240c837a0da997c5cf7c13411bc0abe68f3c15856687dfdc. 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/DEYT72200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867a0186d9602ce2fe7d641cc26e06d34bbd9e238ddf76b39d008c0f828cfb07. 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/DEYT72400079.