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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac8197ace52a0b3611507684726f8dd658531067a47b0c8c4471601dd828f8b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/004c1c19-b158-4d0b-8a13-a32c8b94b9a6.json and https://artists.proofprofile.net/proofs/artist/004c1c19-b158-4d0b-8a13-a32c8b94b9a6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a62922fbf3333f65edc6933dda80b756603cd3fd860f129003daa8bba32a43f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE5Q52000375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684f46b35b15e68484644de609056c2dfbac80e8395b69cacfe0b9a27dada457. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE5Q52001746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340b1bfc45710657d5511dc9c9f1c7960feffe99c963346e3b45d135e0659667. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:55:14Z), 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/SE5Q52001947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39645fcc6afe9525d4b30b84baf6d2d3fd180fcae73301756053ef090c744a3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/SE5Q52003390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9e48504135ed6dcc2d5016b6fc52745ea910947c8fb7383bd49ed2659c5bef. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5Q52003399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8726c3d8d1cff3b6e6e2ae8ab1f4835578b560bdee8c389ea4130ebdafa4e5e4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE5Q52100379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce69a2e8dbf1782894be5f18c90aa68079f71560d5695a8ffd2baa86046a2eba. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:30Z), 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/SE5Q52102281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f5197f53648622c4bf94fd10f28cbb37784d80ef97954e4f7e8acf63180899. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE5Q52103323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03515afb01c07985afbdcf4144ba2feb24534776635dc33bec25018fc09ba51a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE5Q52300550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b5f753ac158e67ee6340a8ce210f13c5429f35ddab30a7d75bae518068abdb. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/SE5Q52402922.