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 0xae97da7fdaef3310c8605da0360d6ff98bc307237fb84d42f01f6d9c4e82fbea. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9600c50c-e8a0-4186-b009-e5c837b17f78.json and https://artists.proofprofile.net/proofs/artist/9600c50c-e8a0-4186-b009-e5c837b17f78.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 0x4124d4b8d5905738bff5cf7debd30df601197ca1b7b65d4fab0cc51dd7d01fe3. 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/QM6MZ2541875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81aa1e186591b583cf7c16a0ac8a6e55e8a59e90da36f18557651a648de4c29. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA62480262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee206af4726ea3afffc2cc62adb415c4a83718195efd7d0caf4b3b3068d91b3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA62480263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201a1f61ed21b8c23cfe9242c5250f777b2c11cf6d7738aaa2f1cedec5769f3a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA62480264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd9eeff2fa8f45e36e1d4d670734c8f5b42f6f92250ce074a8b214e35a841b5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDA62480265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4861e47f21e7ce733c441fcc3deee0676d9b908769045a6a689c0c5ec7a750. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA62480266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f36391233760f42beba8d25f9abf9f62b23089ac5954492aa05152872e24f8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA62480267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20355ec42a0281fec5e2d2c98b977f637f4e297a4af99ad18a1c5df6db844fac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA62480268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787ae33481594adc9ccd1a3d458efb6da10f30d53c7427db505aba6bd5d2788e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEP2370672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c85ecb1e40d8853ac45fbe268d3bf067b15e383f0713612e2b27ca89371e953. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEP2370674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22369412f71da1957985877649b8d5d427bf325b78bb86ee74537de2cdb65f2d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMEP2370675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb413ab0b557542f413f731934fcef1f4b3951687d551c8871e300a8a3bba0f77. 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/QZMEP2370677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e862da58879b8f7e5183792a06fdcc9b9d1374bbaba97c58aac81d4fda8a55. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMEP2370678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33181e9a98233b1ce169feb043af871d34238fc318846a539ac988b988ca30a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN92317933.