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 0x32ea539b388ac8a6b565136fbdaa52eb8bda45de8748ab12657074a17e161073. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d97e1cf7-3f3b-4305-bead-4a86d56afbbe.json and https://artists.proofprofile.net/proofs/artist/d97e1cf7-3f3b-4305-bead-4a86d56afbbe.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 0x33e0f5508aee50d581f4c0371b8afe872cee498f3bdedef3ca6ca88c5a065d5e. 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/USEVP1600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b06f9b554c36fa5cca3a4d191791a06a117b2fe98ecd993792fd923dfffb112. 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/USEVP1600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bff3ca94d91e731bc660c978fdf1203be65873e80bcd8ced92298c505891c0. 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/USEVP1600041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f2402f4f921dd4a48747dfcab30ed78de92a5ce128d52c3ebfe29fcc1e8d23. 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/USEVP1600042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf31c8c6dcbe55e589d61dcdc13b474d5cf147c78b3568acf98e66d3c0b232b. 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/GBCJY1800000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f730b87e01dab73a7cbfc5a8d25040e41e67f342b0300d6974448eb3759d04. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBCJY1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910ee6c6250a57bd878f4ba6fbf72d65fed9cbbab669149de902ec172986bedd. 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/GBCJY1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9eab40864b494d660f00312cc4ff3f90100f7cbd911080f5d84ffc969a9819. 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/GBCJY1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce955be42bb4569bad65ee809dac9dc0dd5f039d0ff4dc3821b1e69e19e68506. 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/GBCJY1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f2b4ea2712b2cba723dadb75334c5c2ef9d112d3c282b486b29d6dafd646f8. 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/GBCJY1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96165a362c80e6a13efa55cdee86370dbd76ceb84948df79bb9d3ae30c12c91. 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/GBCJY1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e2dee26c07e5a93fc4f218bce039d0f276a6127abda447a161280055014e7e. 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/GBCJY1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a74a1950005b9cdf4ab1418e6fad1f8ce874677986667f74754a5274df7527. 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/GBCJY1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87263cc0f5fd914d2844ff8f2a11833f951865cc468529716afdd9975c02c0a9. 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/GBCJY1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2341a602a794c57d0d156b3ff3b9e75b6fcee6338956fa508769221bbfa811. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBCJY1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e4868d2f87ecf0777f42c658ff2aeb9027fe97bca0eff2dec882a707f704ce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USR3R1400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ce3e8180c2b6e4a64bed0d88c2a1eeb516303e7716e0710db1b3fcc67e4f27. 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/TCACI1510178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29768e4ef264ac48b242bc4cab77022c1f73b336232b9149a0530126d604edac. 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/TCAEA1962953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5456b4213678082afada605632548d7468500353ddb2b32a0b54c66bf7f4e313. 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/USR3R2400184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f812f0e85e46f0427ede5096b38ba5b270c8f3711423b30bb0c04ba54a06fd4. 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/NLE802400453.