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 0x894f5c320cfd485cfc12c3e2b3c2ea85272f2dc64061995dd0bea9e52059ee44. 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/8c998be8-b70b-4935-8e18-4ead66e4bcab.json and https://artists.proofprofile.net/proofs/artist/8c998be8-b70b-4935-8e18-4ead66e4bcab.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 0x67c5e95b3922f31e64c41a23b13737583fbd20ba5edded0315da999f366ba7c5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEC610700366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221d6a3c95833a25fc58e64571d23a20d589fd00bfd2292bd6e5b26e5c22ff7b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEC610700368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ec6edc53eca7524ad02a2c79cb492a6f28ba88fefef34708bbcaa39b3bc133. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEC610700369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd233bf5fd9dfd887cbe9011a3637a8b7cd5a06ba562de3ca671bd933e6683ad. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T12:02:15Z), 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/DEC610700370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32c8ef83d4cf74da774ed11ab8bfcf39b5f4cdb3e45dfef1d72fea4c24b3605. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/DEC610700371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac075373fcdb1989569c2a4f9856d097b69904469df48316b93fb24c7124683e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEC610700373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c5f598a2b6a298f23b03723f79f951214713377c8c5a1aec79526f58e866e8. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/DEC610700374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30f32e270934e171a9853b13b6bc5e60be9e69cabf2af42100c25d69d805e84. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEC610700377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058d7cd79bf1a26b2f712cecaf487ad542cf2205b6a8de69e0746da6dac67cfa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:07:42Z), 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/DEC610700379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a42304eb0f90fe2631be49f4636feef9bcc5f648889ca00c032fdb5cfbf8c9. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEC610700380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97de6b7853bd24ada6df66df61e2d58f3e4f4a064bc4e3c210034cbeaee02b1. 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/DEAH91600031.