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 0xfe0d13cbbd0dd8005beea0dec2180ea590de903601230e636775621380c1ca0c. 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/61056f07-8faf-42d6-9019-e2f5266e7edf.json and https://artists.proofprofile.net/proofs/artist/61056f07-8faf-42d6-9019-e2f5266e7edf.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 0x16f247ac378b85301a2e41dad78885c9a1a2513c6b8e606267cbc9d0450678e8. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCJPM2087957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa812d30d8067907acfbf3c616b464c92754973a1c935f2a013d36a142dd83077. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCJPN2166820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a399641e552da8d32e7baed3a220b12721425549c8ddf6f2ea726b45ff67ec. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:56:14Z), 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/TCJPN2166602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32b1783104d520602c562acaaaf566a8f9efeeffbef03074f1bfc27e47793c3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCJPN2166776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4059c72fff7ff51696088426a8174003c4b30fc9922f70fd667fbcaef12778be. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCJPN2166780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818e4328fc7051956ed6c59bed383cdad72af8fdbcf6005131c1ab5f8a7c6b99. 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/TCJPN2166215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a399641e552da8d32e7baed3a220b12721425549c8ddf6f2ea726b45ff67ec. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPN2166602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7c39f3fdc1f2f39e06bcea199a6765b17baa2be587b5688547f11f6ba2d742. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:12:20Z), 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/TCJPN2166770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4059c72fff7ff51696088426a8174003c4b30fc9922f70fd667fbcaef12778be. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPN2166780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd27ea00493c345f72c0856e6c6d4a772fe23ca447edebe4125f6146bf5857bb. 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/TCJPN2166987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1370d9e8c40dc6cfe10b60201127a5c706317dc9b09ecb46669725e46cffcb0b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPN2167015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27aaefb0d18260b0f4b47f0f650c52f7a882ff43dff90ad160dfc9ed7a95cd9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:43:22Z), 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/TCJPQ2111782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78747633239fee175634be3823ac4ca0603f4f7264d30bfda577816c2da9121. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCJPQ2172428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce8481c02cbf195ee113e3d593c63aaca1854d1d8e8762008f0577578ff2248. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:38:53Z), 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/TCJPX2382708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0d11407f84ab1f56625f9109561cf50507de0f1be3f1fc0d42fa09b4961ee9. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:37:14Z), 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/TCJPI2542069.