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 0x45d6f0c6904def7b9d45a3a27051fc1b8ca959fce8d976e9e293e100a83d3cfb. 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/34047cc2-9c7a-496b-9a65-b19925de9f36.json and https://artists.proofprofile.net/proofs/artist/34047cc2-9c7a-496b-9a65-b19925de9f36.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 0xee8c52da329b924a129593440e7d7bf75f78579cc3fcd756da521e7faabbd01a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHN42450320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa500d7ade29f8ad32ad2bb2e3fcfc288a492c92aada9b982dbee533cc740b848. 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/BXBGP2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa259794c04022c498071b355e5cda3e02093b5b68dab92944ddbf05b4156826. 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/BXBGP2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd03c6b93d6446784e54032c179bb02a674faf8a0bcdde35343ead15c4b08e3. 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/QZWDD2287261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3aeecaecc001db7e405ea65c33fcdd55b45fd6bc4dbfc0d3866aaf1d599c5d. 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/QZWDD2287348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d94e91192256e94523c0f7744e2a82a04272d5947703eef61fa1e2287b21a1e. 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/QZWDD2287370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f5ccc150685b766e48fcdcc8eae80e5102ad6e3865cb7acd219255a22b9c6c. 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/QZWDD2287331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9536e533e931d4c0bd65318ea233ba01146b51ce5ee07d8ce38bb7e8e1bad88. 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/QZWDD2287267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54218645072443fd5e2ada3bee4c80025d6e50ba4e6a3888dbbf8fff535a15a8. 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/BKM2L2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e945693a14aaa65ca8679a9bf3b5d9a3165ae530ddd28184c07a07cad42af8. 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/QZWDD2287323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089eb6cfa2dac0fdb75de11ac30830cf864be5f70897e821d5149ef159a01100. 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/BKM2L2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d82c2e683401a2642d71528ace6e42ed68ae9134a4b14f9a42263d164b6c39. 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/QZZEB2420528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0ffc28147f71839fca61a3ada600152774b26df4f1db95f280b5fbef7a2e15. 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/QZZEB2420518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3facd158cc2b9d691a5f7e96bd65482bed98d079501d09050ac8727415c2c994. 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/GBWUL2350374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991ed247ccc61496daf85b45833f747fab046e1e4c2c09780f023d31ca8e1470. 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/BCE7P2301396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ba72e1eabe508c683ff5946cb54ac4e414e7aa0a17be60faa96bfa4de24846. 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/BCE7P2301398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cb521bea1285033e17695d03d2d050677613b4bd1a2f628b49f67f67913ab7. 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/BRRGE2300587.