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 0x7cec71e6ca725835b15dd8c842083eeec32bb02a74a3a21599a49c7bbeed2ec7. 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/f6077821-d366-4b23-a5d5-0411250efff5.json and https://artists.proofprofile.net/proofs/artist/f6077821-d366-4b23-a5d5-0411250efff5.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 0x6a164c05a3398bfaccbad105e8e4c2e063d3e25971fc4fbc080773e5eea902d3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ72224280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbbf183b230f100933a85c66e863a89806dce412f5e97322ed10d83a46961c3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZDA52392774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9925162609ff3083b88ac67e73165b4845f96979690149a697f8588421b006c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAY2359592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93b1d74ff4057e8d3de22859b01ca9cd47271e04a7112e4b8eb1a272e7b23c4. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:55:41Z), 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/QZFZ62564490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa9599fe2d98e436d150b863d900fbd9a7e56aa36e796b9648de1423c1eed61. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZDA42529193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93b1d74ff4057e8d3de22859b01ca9cd47271e04a7112e4b8eb1a272e7b23c4. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:43:55Z), 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/QZFZ62564490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66181628bfb315a58fbceaf7987267a57f06550f07e1904eeb04507ffdb9e0c. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:04:49Z), 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/QZDA42529194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7651f74b053a432c3bd8afd675a11bc1a9ca390d1200e32b36d8228e5ebb1518. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T18:21:19Z), 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/QZDA42529195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90cf68b609989f4f54cf701e8b910499870cdef91e1624b6eb9e96dfaf1e40f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZFYZ2560672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df9ccb2acf6572e071c3e1b955eaf57ad4e511260d90d53a5cca5824b07c078. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ATI211911711.