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 0x250ccbd645de8110be834b25068e54a1a2f3395caab1f2ba6da107234e7d9cf3. 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/d86d5226-0735-4cf7-99d6-7b4dca9e7b88.json and https://artists.proofprofile.net/proofs/artist/d86d5226-0735-4cf7-99d6-7b4dca9e7b88.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 0x2adb6f9405646dc338927532458bc8a460019e2b0140b52bf8c97da12ff9e034. 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/GBR9M1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adb6f9405646dc338927532458bc8a460019e2b0140b52bf8c97da12ff9e034. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBR9M1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f72637ce13951783a9e69e8b949fdadf621afb11720f6f0187aeda4608cd67. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR8PO1800200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df65a45e2d7e89c7f2ad40d26ba3a27a16cd56e03ad8344c00f63a2a631c1f2. 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/FR8PO1800300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126cd9062ac3dd9233b49a2729cab276f1a944b8ea9bdae743b7c9f769b0d641. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/FR8PO1800510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c9633680e77aac683603cea12a457a53fc31a22e5d0192e2e81d1d22fcb81b. 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/FR8PO1800400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d317aa07b75096131896b46d99e92e2922dfb1549dfa111aeecf8041c60cb5. 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/GBLV62108149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c075a213b0a94c2b3f8877a09a4d899580d133c247552dbbed74b42342f0f9. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/GBLV62111220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0fd53502a258949fd078ed63a253b2fcf62c35272d12efcbd29c82c3b59139. 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/GBKQU2182484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad8faf16015b39c15a3ebc1107d3b3ef75ea34978b4b494193482e70aa3c237. 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/GBLV62100797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d317aa07b75096131896b46d99e92e2922dfb1549dfa111aeecf8041c60cb5. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBLV62108149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae49b1419118166092ec3ed5a0bd7fcf1ab1d71e2f9558fec7102e91a4d78dc1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBKQU2359639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3b80052b3559e43be3804d8d8dbbe573d250d3e0afa6a4f4dbfaf632b10b64. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/GBKQU2428389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374426158545f0a485d84999317dad19954d1ef6f6b12f9aa032b38584bb7adc. 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/GBKQU2493141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30886062b765e994f7bbaafad88c505a6475ff0db00a9638b9bd33e92c85663. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GBKQU2500996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc2ef468e340a4359e6cd999fff40578b213966c80e73300dbbf18294564385. 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/GBKQU2500997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374426158545f0a485d84999317dad19954d1ef6f6b12f9aa032b38584bb7adc. 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/GBKQU2493141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e48c2349973f0f933e88ddaed9944d524497e39bb25dcd15e3f24d21197fdb2. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBKQU2539991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0023a701e53fed60ab11871923e83492fb72cdd36457a7b2329e68c1ce4400bc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBKQU2521240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cb95f42f77a020aaba5556a620e1c272552b2618a46834d9d8e11a1a751927. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GBKQU2539992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fec683ef5ddd105b5c24784f4c4177fc3d25825b2bb988c6cc479bc8273602. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBTDG1301852.