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 0x758f281d0c9e2ccc9668501e0b55290d6b299cc20f707859669f5d152e75a7e2. 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/5770327d-dac3-42c7-9532-1d1c1ff3e5de.json and https://artists.proofprofile.net/proofs/artist/5770327d-dac3-42c7-9532-1d1c1ff3e5de.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 0xc65ce92c01d3f77d0892e4101ad550be1fb48965cd41f1f36dff48ac8e0e739d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ZA56E1402443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9e229e445ff727a51e429d2145a603e3dbb403501e74f405b0130e565017cc. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:38:25Z), 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/ZA56E1402447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d7e143a3ef0796df59b11375a65fd22dd9d5552920b64c4fd93893156bb15b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ZA56E1402204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fef7166e74d413bab632ba5634fc5f1897aa7604e63fe5ffef4c4d04d6cd2b. 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/ZA56E1402205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e571db20d70f450929da7fa90ad50208428583ac9ec61b610fb45db192b5848. 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/ZA56E1402209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e75b98d860d9941a0e3ee4bf2ca6775a7bcef769f50ff8abf4820c6fd768045. 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/ZA56E1402210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0271ae54f0faa87aa4553991e626a195ea42357609bb458a8f4d8d10877a6199. 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/ZAC930500384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5d0ab3bf83e0b3cc7a116e2470c06d0d07d6360f053687d2fd05d10159b2d0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ZAC930500390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1644da2d5c48b4920f1e15616f6cacf2c1f156bfae3e6ae82f266c451ca859c. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/ZA56E1403259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d125a3d4dad9a26da68031776f6be2db74a35815b618094f1728f2ca94cb624. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ZA56E1403260.