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 0xfa906ee69b05102ca196acf58031fba92a28e5e2f27362491d6d7bf8975f5fb6. 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/e757e82e-b300-4b48-b227-a1c9a8c6d53b.json and https://artists.proofprofile.net/proofs/artist/e757e82e-b300-4b48-b227-a1c9a8c6d53b.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 0x801cf833eeea7c0ff92fbc0e700213cb6732cd1d243a2c2b752b6101cad9fcbd. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/ESA011753974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263ad9d7ec784cae64e42f6b22f1fdf97b770015728e235cdb68611d647b40b9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHZ51934169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55fad7f1201085532bc4b03436adf5a1c0eeab9a719e74077d85bd988c964b8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AUMEV2344192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361eba7c42b965d768aa2840b68af7053f634e88cd189a97a1cc8bf0e02f6df5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUMEV2370222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00deed9f4882664281219ae2b54626afe990474f992e434c6b89b2f36ea74a44. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:11:27Z), 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/GX3Q92334298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1a69f304549587dc4589cfc4db2d90606aae03552baaaf32595bd21ab57bbd. 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/COAF42290203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bd197e0339b095f197e7fc0ef5953b35d926ec95c22b1cfffd5f99eab86060. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/AUMEV2370228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55fad7f1201085532bc4b03436adf5a1c0eeab9a719e74077d85bd988c964b8. 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/AUMEV2344192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c02a65543aa6794d7bc5432f4b1937699e0e0b81c3bcb7cd284a6e8243ed7d4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUGBT2318846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac44a3cc17d1173567522f423c6bb4e06dbdded8998c461f55d28c15e252819c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:45Z), 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/AUGBT2341202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccf70e8065f1618002a7a73f52bdd10d35a004be18012af7ac50c258b958809. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARIXB2403304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0ca34cb4c0e4e33dbb5176a6cdd6c7685fd7131458c263af3816610fad0a4a. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/ARIXB2403306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1736f04b67725385496b139b5b814329a5f1a4bf7cf21a0e3fe73570520d98eb. 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/ARIXB2403307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ef095eb0e9875dfb6a3e83868f5b6a8be4c5ed0574409c3c52e324ec59a9af. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/ARIXB2403303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccf70e8065f1618002a7a73f52bdd10d35a004be18012af7ac50c258b958809. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:58:01Z), 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/ARIXB2403304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0ca34cb4c0e4e33dbb5176a6cdd6c7685fd7131458c263af3816610fad0a4a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ARIXB2403306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1736f04b67725385496b139b5b814329a5f1a4bf7cf21a0e3fe73570520d98eb. 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/ARIXB2403307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecf55bce0aeb04951b31d9fd55dfb2e66213e19147b0ed398410405613e5214. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/ARIXB2501774.