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 0xe78eff7c230d1b094b84f346d87de8daa0f2b1a54643b1c5129a67d5c695f8dd. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ce70ce5-1fc6-4960-81a3-3be1133cfa4b.json and https://artists.proofprofile.net/proofs/artist/7ce70ce5-1fc6-4960-81a3-3be1133cfa4b.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 0x018d7783c2b84a1768c60a279f19a048ca1768655ca37c70fa12265969f775de. 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/AUMEV2573332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbae4f439b4b69ee04a7e49492357f0c49b8221246da625dafc07b27c4b3c464. 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/AUMEV2573333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61da65dc20f446744b4c50aaeddd0aeb6df794dfe9f20fd20883ef08ee16d1a7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AUMEV2573334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4309ee919b098d3a9250d68d553af2d03717971d55870ec8757dcf455fd774. 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/AUMEV2573335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d50a016dd443d85f9c812e8065908812879686b7147c839e54a5d7824706a14. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:21:56Z), 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/AUMEV2573336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b67ea5c1798ff1b31cf6da1066d49cf186b57dd62a5c4ccec064337d33ab00d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUMEV2573340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab94fefba9d12ba49fbfedd35d8763d8ea1703c7793736f3cd730c0e5032651f. 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/AUMEV2573341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb474f3879e9f21257cc5ea58af2231bb0d39161f9f5246e0f9c299888ed8d3b2. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:18:40Z), 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/AUMEV2573342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd4731e8cc2e82943a8fa1eabee1d23574710dedac05b4c84a62431803153d3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:46:41Z), 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/AUMEV2573344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1546010b651daf4410fdf8d97e8f6e33f931c2ffe8c0142708b6ca3df34074f5. 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/AUMEV2573345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e653e38074c1609f115f2b04d0ec0430b0c1c3af50e21245765c1af8704f83a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/AUMEV2573346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b752e12f86c5c0542f133e284de08d824b2897dc7d07c3576511fe6311b665f. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/AUMEV2573348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16888a4312365f1f3da3c9c9eeed5b8089197cbfe3bf4bfc074c27917d957269. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:01:52Z), 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/AUMEV2573349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68794f38a17d6e238d68e3ec13c42ab3ec1d897d0dd1d2f52ee53af30d5f5175. 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/AUMEV2573351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfdb66c37152a24cf2be6f5d67e3801a7a724086fe337eae4c2f22614b374ec. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:50:08Z), 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/TCAJW2548608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e02ed678470474dd34d99ea3867b52539cdcd84e7e66e3816de7e4419c76008. 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/TCAJW2548612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568d025929f1f6b3ad717f4612aea52200cc054348d832cedf3dc98195bd9629. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:15:34Z), 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/TCAJW2548617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b55d31c4cf598d146fb7011af05923a35ceb3db61f68120591bb3e32470610. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJW2548629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4df6bea2eb1c0e61eaa76ca23d1a94b890c5975572f92f300605f9136ab547. 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/TCAJX2548645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69b1849aaa503ef3f317691b8f2c7f889e51b054529948c872bc1310e635a66. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJW2548653.