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 0xd21b826e0e3fc9631df35d2ea9210935e7f30e1ef5aa97f07cf574d70a87568b. 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/458ae417-cc47-4f40-9ab0-f3a71241c9e1.json and https://artists.proofprofile.net/proofs/artist/458ae417-cc47-4f40-9ab0-f3a71241c9e1.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 0x400a120c08407637eb0e52b65da55bb2a45d05331c6bce4070992f6a3c8c4954. 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/USHM22039475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1075ad23425b2f47a233c8f586189ef65d1542d8c9d3c5c94bbed2f2a83a767b. 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/USHM22039478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f10ed6861664fa02b105e40ba09910f87f1866810c60220bf201da153d64322. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:25:07Z), 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/USHM22039488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f5b347510778a8d36782b024a7cc9dc7b9fa76220936d311ae486bbb36f273. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:34Z), 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/USHM22039489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6992a05a6c5269cf5bfd26468f287b3bd7698f48b1f494ffb030b261bce37fbb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM22039491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3149ebfd16341e7736719adccb4a8c60c78500c78fabc5f3c39833ef58f634. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USHM22039496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f819951df5b61ac31255907e7386b3397f506431b049055e21a1c2194420dad. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:35:42Z), 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/USHM22073934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a65cd5620095df2d862c3637dc137c466954d4ee5f92b02de5b7336aa82859. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:56:53Z), 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/USHM82061266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c3e5770d748508eb5a1da57663c8f30899ecc08c45ecb0035c76ea9805a9d3. 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/USHM82061268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc4d6cf24db18840173aa55cb0147c28b595bf21c2840eed9df46a2b089037c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:43:30Z), 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/USHM82061269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44e76905f56baec2f9eb26fd806ba616e9442ddfc7843991156021fd69dfc2c. 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/USHM82061270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7174358fa5ac87c98fb9a959afc4b7d1de6ad1cd10b6012ae90c20af37b0a0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM82061271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8188f3c8526ce4d0eea6932fe47896ce971cee3491bd64a788474e40bf0af4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM82061272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1cc01bc24988f3c171725bd6a95da93689061c282fab5a2c6a60f38da242fa. 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/USHM22039503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cf1cd80d1633495a5d9535ee6df4000ce240bd798f9f8ac2394aadde50ba59. 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/USHM22039504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5910836820721cdfa61d51172b5b7fa2bd2d8c053f185253df95b2f4f8167680. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USHM22039506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e100318f5afe3e42ff9df9722f6acdb5becf320317328a091e2ab785fe8afad. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USHM82004402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caad14025764314bfc209fb57198b20e9069d24b14d31f13cdf3521fd707e36. 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/USX9P2059817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc60d61bbac908b99e0f01fe9cf26e8323163c34628a12afc165c41ec2ca5ec. 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/USDY42166661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8098d7dad66b62641dbdb97d7a13cd8fe6713f75463fe7ac59d6177676eb402. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USHM82415497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57e8afc5900de679cde43111ef395993a4d06398958053f6e28812549cbea34. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/USHM82417496.