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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9ef394515fef5d6c2ffc4bb86d75fbc1da443d59ede230897cee73b95dcf6b. 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/a684c8c6-2879-4799-beeb-217c80f7789a.json and https://artists.proofprofile.net/proofs/artist/a684c8c6-2879-4799-beeb-217c80f7789a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad9c05dbaff36f228b2bcb6f5cbc3cf8a0047a95d2aa15fcc3522e79a831dda. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/US83Z2146296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c9d34d33278b75c795ece71a8a4b4a34ac02c7caabe4c567ddc139f8a20802. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US83Z2146298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44699b6d5722395444f8bfb82bda05ddbc9ab6bcab06b57a151ff5635f67b14c. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/US83Z2213459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40a222bc63e33257a3798361a6ea63a3ade1975f9aaf487389a9b3eecd95c20. 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/US83Z2322292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6755f8e1b8e14238f3eef2d6cf61c1324ff90fd91d446f2e9e2616a6e00c7bbf. 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/NLUP62300227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2138195d37f00b0efd041bb9e06be7f21bc21ab951af11c6933c1e4cf51eba. 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/US83Z2350599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ea2f1c3c91ecb99f0b78c6dd88daf393aab7c15335dba09eb99a683a8d3fda. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US83Z2350600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f8cba6d2c6088df7b6008e71c95bc11a56842d65d70e1baf86499fac5ead04. 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/UKU932400352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fd7890635629dfe9f1b58a9c1c600d2a06f74b0ff9b2201704497b70644913. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEH742409715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa285228fe685882421642f75867555111b783d0c39af58b4611fa699fd6d26d9. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/UKACT2401071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf8baa19499fe5df675244b673a54f260c406bc8dfd0638825d1c6655dde7f3. 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/UKACT2401072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a358a9fd7a4089817874034a07c6df7531c04e7fcc7e38cc88abb922d89565. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GXBNP2502642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabca715ae5c7c8cbd47bffd4830c0a1ec25f7506e819731b076c8d9ee88f0d5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXBNP2502643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7711614bb977974ee1f9dcae602bc2312c51ff620c7ebb41b445353e4b5a60. 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/DEH742519275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f8ab471bf415b3d7de59b64bff235e20ab3e66233730c78926d0bb2e0432b2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GXBNP2552787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e89fa227fc5cdf79d79d90164ea20b6fc129a5573baeac421b7703b3764d5ac. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GXBNP2552788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6331088cc75eec604940169253309809ce69b7fda6240a933d6107a45643a269. 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/GBKQU2310863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f9222d4c1c800cd26bc3649c2aa07801c9a5622a34507e86b6583fa1db65fe. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKQU2310864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9f98fc3e5e51ad39b1f39c3888626fe7693147dac0066dbc5c4fccf79e7865. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBKQU2310865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3afa6090800271c8dad9e941ebfef0eea199b9ba5482abc730ee8092422648. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2146299.