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 0x08fc7af75b76ae4ce684df263563747a555b1bed2eafb1c5c266d506f3809d7a. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df58ba38-36b8-449c-a033-d84cd1efde92.json and https://artists.proofprofile.net/proofs/artist/df58ba38-36b8-449c-a033-d84cd1efde92.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 0x9bde3ea5c8a56d75e900104140d20e59aad85eab0fa6534551efb45a5b811cff. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GXF9Q2539320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865ca4966622608359a35ee91dad740b400f20f36749a735ae8e47ac98bc0c18. 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/QT3FF2510408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ac503c012197c8ab309a13c7fdc5dc6c3c0bedae53daf1b61c8558fc58db8b. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QT3FF2530522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe152ffa1c1d9e8547195e27b2bfa9dfc5db05e4c0d378ee5164e46337e6020a1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3FF2575246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc638bb6767eb2111564806b8bffc24b1c7a42c587bac7c763dff3826d252c76e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT6E52538860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec93cc6801b26a9905537cc0a6d7f5567868855917d192282c5e0dc111ce83b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QT6E52534034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdb5abc0e2455363977f5225c0e13769dbad3d98adcf938bde4b03a8b6c7b55. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT6E52538861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d0d3cb4c93f2c26a7b6bebae574399402dbf46354292593d2c5d32bffa18e5. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT6E52538859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603bfd17430bd8cb2443237fd19df9f556312780448498e34ce3de2ae47fb221. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT6E62578213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311219343213b6df8646ec2994d0bf1e02342a381f179b2cf9dfc1f37599e0fe. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT6E62578251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45df728273d4e603dc5ffd090304c4dfcbffe8d5bcd3b767b42a46b9c84ffd4. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT6E62581089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997df48aead8af909254383c07b58eef86c29aae24ed1efe3f22fd096bdf8905. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT6E62578138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c106d7a274b1b81447914e01361b90b2c0299bf7f2f193fa6fb9e29d7cd7bf. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT6E82530376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e52b65f6e946137ddc136d35d9ff273df8c247bc52f5a0b5cd1f2c33668f103. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT6E82527324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354d4c20a7af862aafeb406ad7edeb894846def185074a13f28c87b25c568a03. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QT6EA2567627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab30c90766b9e665ca10183ac1c783674a5b573a5eda27c53e86430cbca2dfe. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QT6EA2567633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bedb0d28dd121bc0e358dfaaa2920f7a2ee99b60f9ca3a7bf8280ded6f352b0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT6EA2563082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f25fa540e457b66e01816fff6686707d2ea72d9f2bf4e9f26b4d4390492bd70. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QT6EA2567632.